mirror of
https://we.phorge.it/source/phorge.git
synced 2024-11-09 16:32:39 +01:00
Implement a more compact, general database-backed key-value cache
Summary: See discussion in D4204. Facebook currently has a 314MB remarkup cache with a 55MB index, which is slow to access. Under the theory that this is an index size/quality problem (the current index is on a potentially-384-byte field, with many keys sharing prefixes), provide a more general index with fancy new features: - It implements PhutilKeyValueCache, so it can be a component in cache stacks and supports TTL. - It has a 12-byte hash-based key. - It automatically compresses large blocks of data (most of what we store is highly-compressible HTML). Test Plan: - Basics: - Loaded /paste/, saw caches generate and save. - Reloaded /paste/, saw the page hit cache. - GC: - Ran GC daemon, saw nothing. - Set maximum lifetime to 1 second, ran GC daemon, saw it collect the entire cache. - Deflate: - Selected row formats from the database, saw a mixture of 'raw' and 'deflate' storage. - Used profiler to verify that 'deflate' is fast (12 calls @ 220us on my paste list). - Ran unit tests Reviewers: vrana, btrahan Reviewed By: vrana CC: aran Differential Revision: https://secure.phabricator.com/D4259
This commit is contained in:
parent
62bc3373e5
commit
aae5f9efd3
9 changed files with 407 additions and 13 deletions
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@ -1130,6 +1130,13 @@ return array(
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'remarkup.enable-embedded-youtube' => false,
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'remarkup.enable-embedded-youtube' => false,
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// -- Cache ----------------------------------------------------------------- //
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// Set this to false to disable the use of gzdeflate()-based compression in
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// some caches. This may give you less performant (but more debuggable)
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// caching.
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'cache.enable-deflate' => true,
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// -- Garbage Collection ---------------------------------------------------- //
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// -- Garbage Collection ---------------------------------------------------- //
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// Phabricator generates various logs and caches in the database which can
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// Phabricator generates various logs and caches in the database which can
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@ -1160,6 +1167,7 @@ return array(
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'gcdaemon.ttl.differential-parse-cache' => 14 * (24 * 60 * 60),
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'gcdaemon.ttl.differential-parse-cache' => 14 * (24 * 60 * 60),
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'gcdaemon.ttl.markup-cache' => 30 * (24 * 60 * 60),
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'gcdaemon.ttl.markup-cache' => 30 * (24 * 60 * 60),
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'gcdaemon.ttl.task-archive' => 14 * (24 * 60 * 60),
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'gcdaemon.ttl.task-archive' => 14 * (24 * 60 * 60),
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'gcdaemon.ttl.general-cache' => 30 * (24 * 60 * 60),
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// -- Feed ------------------------------------------------------------------ //
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// -- Feed ------------------------------------------------------------------ //
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11
resources/sql/patches/20121220.generalcache.sql
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11
resources/sql/patches/20121220.generalcache.sql
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@ -0,0 +1,11 @@
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CREATE TABLE {$NAMESPACE}_cache.cache_general (
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id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
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cacheKeyHash CHAR(12) BINARY NOT NULL,
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cacheKey VARCHAR(128) NOT NULL COLLATE utf8_bin,
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cacheFormat VARCHAR(16) NOT NULL COLLATE utf8_bin,
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cacheData LONGBLOB NOT NULL,
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cacheCreated INT UNSIGNED NOT NULL,
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cacheExpires INT UNSIGNED,
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KEY `key_cacheCreated` (cacheCreated),
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UNIQUE KEY `key_cacheKeyHash` (cacheKeyHash)
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) ENGINE=InnoDB, COLLATE utf8_general_ci;
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@ -505,6 +505,7 @@ phutil_register_library_map(array(
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'JavelinUIExample' => 'applications/uiexample/examples/JavelinUIExample.php',
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'JavelinUIExample' => 'applications/uiexample/examples/JavelinUIExample.php',
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'JavelinViewExample' => 'applications/uiexample/examples/JavelinViewExample.php',
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'JavelinViewExample' => 'applications/uiexample/examples/JavelinViewExample.php',
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'JavelinViewExampleServerView' => 'applications/uiexample/examples/JavelinViewExampleServerView.php',
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'JavelinViewExampleServerView' => 'applications/uiexample/examples/JavelinViewExampleServerView.php',
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'LiskChunkTestCase' => 'infrastructure/storage/lisk/__tests__/LiskChunkTestCase.php',
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'LiskDAO' => 'infrastructure/storage/lisk/LiskDAO.php',
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'LiskDAO' => 'infrastructure/storage/lisk/LiskDAO.php',
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'LiskDAOSet' => 'infrastructure/storage/lisk/LiskDAOSet.php',
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'LiskDAOSet' => 'infrastructure/storage/lisk/LiskDAOSet.php',
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'LiskDAOTestCase' => 'infrastructure/storage/lisk/__tests__/LiskDAOTestCase.php',
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'LiskDAOTestCase' => 'infrastructure/storage/lisk/__tests__/LiskDAOTestCase.php',
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@ -835,6 +836,7 @@ phutil_register_library_map(array(
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'PhabricatorInlineSummaryView' => 'infrastructure/diff/view/PhabricatorInlineSummaryView.php',
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'PhabricatorInlineSummaryView' => 'infrastructure/diff/view/PhabricatorInlineSummaryView.php',
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'PhabricatorJavelinLinter' => 'infrastructure/lint/linter/PhabricatorJavelinLinter.php',
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'PhabricatorJavelinLinter' => 'infrastructure/lint/linter/PhabricatorJavelinLinter.php',
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'PhabricatorJumpNavHandler' => 'applications/search/engine/PhabricatorJumpNavHandler.php',
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'PhabricatorJumpNavHandler' => 'applications/search/engine/PhabricatorJumpNavHandler.php',
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'PhabricatorKeyValueDatabaseCache' => 'applications/cache/PhabricatorKeyValueDatabaseCache.php',
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'PhabricatorLDAPLoginController' => 'applications/auth/controller/PhabricatorLDAPLoginController.php',
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'PhabricatorLDAPLoginController' => 'applications/auth/controller/PhabricatorLDAPLoginController.php',
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'PhabricatorLDAPProvider' => 'applications/auth/ldap/PhabricatorLDAPProvider.php',
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'PhabricatorLDAPProvider' => 'applications/auth/ldap/PhabricatorLDAPProvider.php',
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'PhabricatorLDAPRegistrationController' => 'applications/auth/controller/PhabricatorLDAPRegistrationController.php',
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'PhabricatorLDAPRegistrationController' => 'applications/auth/controller/PhabricatorLDAPRegistrationController.php',
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@ -1789,6 +1791,7 @@ phutil_register_library_map(array(
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'JavelinUIExample' => 'PhabricatorUIExample',
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'JavelinUIExample' => 'PhabricatorUIExample',
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'JavelinViewExample' => 'PhabricatorUIExample',
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'JavelinViewExample' => 'PhabricatorUIExample',
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'JavelinViewExampleServerView' => 'AphrontView',
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'JavelinViewExampleServerView' => 'AphrontView',
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'LiskChunkTestCase' => 'PhabricatorTestCase',
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'LiskDAOTestCase' => 'PhabricatorTestCase',
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'LiskDAOTestCase' => 'PhabricatorTestCase',
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'LiskEphemeralObjectException' => 'Exception',
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'LiskEphemeralObjectException' => 'Exception',
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'LiskFixtureTestCase' => 'PhabricatorTestCase',
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'LiskFixtureTestCase' => 'PhabricatorTestCase',
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@ -2118,6 +2121,7 @@ phutil_register_library_map(array(
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'PhabricatorInlineCommentPreviewController' => 'PhabricatorController',
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'PhabricatorInlineCommentPreviewController' => 'PhabricatorController',
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'PhabricatorInlineSummaryView' => 'AphrontView',
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'PhabricatorInlineSummaryView' => 'AphrontView',
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'PhabricatorJavelinLinter' => 'ArcanistLinter',
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'PhabricatorJavelinLinter' => 'ArcanistLinter',
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'PhabricatorKeyValueDatabaseCache' => 'PhutilKeyValueCache',
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'PhabricatorLDAPLoginController' => 'PhabricatorAuthController',
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'PhabricatorLDAPLoginController' => 'PhabricatorAuthController',
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'PhabricatorLDAPRegistrationController' => 'PhabricatorAuthController',
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'PhabricatorLDAPRegistrationController' => 'PhabricatorAuthController',
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'PhabricatorLDAPUnknownUserException' => 'Exception',
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'PhabricatorLDAPUnknownUserException' => 'Exception',
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232
src/applications/cache/PhabricatorKeyValueDatabaseCache.php
vendored
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232
src/applications/cache/PhabricatorKeyValueDatabaseCache.php
vendored
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<?php
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final class PhabricatorKeyValueDatabaseCache
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extends PhutilKeyValueCache {
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const CACHE_FORMAT_RAW = 'raw';
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const CACHE_FORMAT_DEFLATE = 'deflate';
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public function setKeys(array $keys, $ttl = null) {
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$call_id = null;
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if ($this->getProfiler()) {
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$call_id = $this->getProfiler()->beginServiceCall(
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array(
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'type' => 'kvcache-set',
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'name' => 'phabricator-db',
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'keys' => array_keys($keys),
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'ttl' => $ttl,
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));
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}
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if ($keys) {
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$map = $this->digestKeys(array_keys($keys));
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$conn_w = $this->establishConnection('w');
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$sql = array();
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foreach ($map as $key => $hash) {
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$value = $keys[$key];
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list($format, $storage_value) = $this->willWriteValue($key, $value);
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$sql[] = qsprintf(
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$conn_w,
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'(%s, %s, %s, %s, %d, %nd)',
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$hash,
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$key,
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$format,
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$storage_value,
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time(),
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$ttl ? (time() + $ttl) : null);
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}
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$guard = AphrontWriteGuard::beginScopedUnguardedWrites();
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foreach (PhabricatorLiskDAO::chunkSQL($sql) as $chunk) {
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queryfx(
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$conn_w,
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'INSERT INTO %T
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(cacheKeyHash, cacheKey, cacheFormat, cacheData,
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cacheCreated, cacheExpires) VALUES %Q
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ON DUPLICATE KEY UPDATE
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cacheKey = VALUES(cacheKey),
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cacheFormat = VALUES(cacheFormat),
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cacheData = VALUES(cacheData),
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cacheCreated = VALUES(cacheCreated),
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cacheExpires = VALUES(cacheExpires)',
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$this->getTableName(),
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$chunk);
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}
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unset($guard);
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}
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if ($call_id) {
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$this->getProfiler()->endServiceCall($call_id, array());
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}
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return $this;
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}
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public function getKeys(array $keys) {
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$call_id = null;
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if ($this->getProfiler()) {
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$call_id = $this->getProfiler()->beginServiceCall(
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array(
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'type' => 'kvcache-get',
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'name' => 'phabricator-db',
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'keys' => $keys,
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));
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}
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$results = array();
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if ($keys) {
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$map = $this->digestKeys($keys);
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$rows = queryfx_all(
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$this->establishConnection('r'),
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'SELECT * FROM %T WHERE cacheKeyHash IN (%Ls)',
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$this->getTableName(),
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$map);
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$rows = ipull($rows, null, 'cacheKey');
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foreach ($keys as $key) {
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if (empty($rows[$key])) {
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continue;
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}
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$row = $rows[$key];
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if ($row['cacheExpires'] && ($row['cacheExpires'] < time())) {
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continue;
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}
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try {
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$results[$key] = $this->didReadValue(
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$row['cacheFormat'],
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$row['cacheData']);
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} catch (Exception $ex) {
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// Treat this as a cache miss.
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phlog($ex);
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}
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}
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}
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if ($call_id) {
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$this->getProfiler()->endServiceCall(
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$call_id,
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array(
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'hits' => array_keys($results),
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));
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}
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return $results;
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}
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public function deleteKeys(array $keys) {
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$call_id = null;
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if ($this->getProfiler()) {
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$call_id = $this->getProfiler()->beginServiceCall(
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array(
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'type' => 'kvcache-del',
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'name' => 'phabricator-db',
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'keys' => $keys,
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));
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}
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if ($keys) {
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$map = $this->digestKeys($keys);
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queryfx(
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$this->establishConnection('w'),
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'DELETE FROM %T WHERE cacheKeyHash IN (%Ls)',
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$this->getTableName(),
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$keys);
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}
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if ($call_id) {
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$this->getProfiler()->endServiceCall($call_id, array());
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}
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return $this;
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}
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public function destroyCache() {
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queryfx(
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$this->establishConnection('w'),
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'DELETE FROM %T',
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$this->getTableName());
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return $this;
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}
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/* -( Raw Cache Access )--------------------------------------------------- */
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public function establishConnection($mode) {
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// TODO: This is the only concrete table we have on the database right
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// now.
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return id(new PhabricatorMarkupCache())->establishConnection($mode);
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}
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public function getTableName() {
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return 'cache_general';
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}
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/* -( Implementation )----------------------------------------------------- */
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private function digestKeys(array $keys) {
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$map = array();
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foreach ($keys as $key) {
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$map[$key] = PhabricatorHash::digestForIndex($key);
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}
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return $map;
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}
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private function willWriteValue($key, $value) {
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if (!is_string($value)) {
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throw new Exception("Only strings may be written to the DB cache!");
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}
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static $can_deflate;
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if ($can_deflate === null) {
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$can_deflate = function_exists('gzdeflate') &&
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PhabricatorEnv::getEnvConfig('cache.enable-deflate');
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}
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// If the value is larger than 1KB, we have gzdeflate(), we successfully
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// can deflate it, and it benefits from deflation, store it deflated.
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if ($can_deflate) {
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$len = strlen($value);
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if ($len > 1024) {
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$deflated = gzdeflate($value);
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if ($deflated !== false) {
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$deflated_len = strlen($deflated);
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if ($deflated_len < ($len / 2)) {
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return array(self::CACHE_FORMAT_DEFLATE, $deflated);
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}
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}
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}
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}
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return array(self::CACHE_FORMAT_RAW, $value);
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}
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private function didReadValue($format, $value) {
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switch ($format) {
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case self::CACHE_FORMAT_RAW:
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return $value;
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case self::CACHE_FORMAT_DEFLATE:
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if (!function_exists('gzinflate')) {
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throw new Exception("No gzinflate() to read deflated cache.");
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}
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$value = gzinflate($value);
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if ($value === false) {
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throw new Exception("Failed to deflate cache.");
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}
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return $value;
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default:
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throw new Exception("Unknown cache format.");
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}
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}
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}
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@ -124,23 +124,22 @@ final class PhabricatorPasteQuery
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}
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}
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private function loadContent(array $pastes) {
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private function loadContent(array $pastes) {
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$cache = id(new PhabricatorKeyValueDatabaseCache())
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->setProfiler(PhutilServiceProfiler::getInstance());
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$keys = array();
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$keys = array();
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foreach ($pastes as $paste) {
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foreach ($pastes as $paste) {
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$keys[] = $this->getContentCacheKey($paste);
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$keys[] = $this->getContentCacheKey($paste);
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}
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}
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// TODO: Move to a more appropriate/general cache once we have one? For
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// now, this gets automatic GC.
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$caches = $cache->getKeys($keys);
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$caches = id(new PhabricatorMarkupCache())->loadAllWhere(
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'cacheKey IN (%Ls)',
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$keys);
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$caches = mpull($caches, null, 'getCacheKey');
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$need_raw = array();
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$need_raw = array();
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foreach ($pastes as $paste) {
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foreach ($pastes as $paste) {
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$key = $this->getContentCacheKey($paste);
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$key = $this->getContentCacheKey($paste);
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if (isset($caches[$key])) {
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if (isset($caches[$key])) {
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$paste->attachContent($caches[$key]->getCacheData());
|
$paste->attachContent($caches[$key]);
|
||||||
} else {
|
} else {
|
||||||
$need_raw[] = $paste;
|
$need_raw[] = $paste;
|
||||||
}
|
}
|
||||||
|
@ -150,18 +149,17 @@ final class PhabricatorPasteQuery
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
$write_data = array();
|
||||||
|
|
||||||
$this->loadRawContent($need_raw);
|
$this->loadRawContent($need_raw);
|
||||||
foreach ($need_raw as $paste) {
|
foreach ($need_raw as $paste) {
|
||||||
$content = $this->buildContent($paste);
|
$content = $this->buildContent($paste);
|
||||||
$paste->attachContent($content);
|
$paste->attachContent($content);
|
||||||
|
|
||||||
$guard = AphrontWriteGuard::beginScopedUnguardedWrites();
|
$write_data[$this->getContentCacheKey($paste)] = (string)$content;
|
||||||
id(new PhabricatorMarkupCache())
|
|
||||||
->setCacheKey($this->getContentCacheKey($paste))
|
|
||||||
->setCacheData($content)
|
|
||||||
->replace();
|
|
||||||
unset($guard);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
$cache->setKeys($write_data);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
|
@ -49,6 +49,7 @@ final class PhabricatorGarbageCollectorDaemon extends PhabricatorDaemon {
|
||||||
$n_parse = $this->collectParseCaches();
|
$n_parse = $this->collectParseCaches();
|
||||||
$n_markup = $this->collectMarkupCaches();
|
$n_markup = $this->collectMarkupCaches();
|
||||||
$n_tasks = $this->collectArchivedTasks();
|
$n_tasks = $this->collectArchivedTasks();
|
||||||
|
$n_cache = $this->collectGeneralCaches();
|
||||||
|
|
||||||
$collected = array(
|
$collected = array(
|
||||||
'Herald Transcript' => $n_herald,
|
'Herald Transcript' => $n_herald,
|
||||||
|
@ -56,6 +57,7 @@ final class PhabricatorGarbageCollectorDaemon extends PhabricatorDaemon {
|
||||||
'Differential Parse Cache' => $n_parse,
|
'Differential Parse Cache' => $n_parse,
|
||||||
'Markup Cache' => $n_markup,
|
'Markup Cache' => $n_markup,
|
||||||
'Archived Tasks' => $n_tasks,
|
'Archived Tasks' => $n_tasks,
|
||||||
|
'General Cache Entries' => $n_cache,
|
||||||
);
|
);
|
||||||
$collected = array_filter($collected);
|
$collected = array_filter($collected);
|
||||||
|
|
||||||
|
@ -200,4 +202,25 @@ final class PhabricatorGarbageCollectorDaemon extends PhabricatorDaemon {
|
||||||
return count($task_ids);
|
return count($task_ids);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
private function collectGeneralCaches() {
|
||||||
|
$key = 'gcdaemon.ttl.general-cache';
|
||||||
|
$ttl = PhabricatorEnv::getEnvConfig($key);
|
||||||
|
if ($ttl <= 0) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
$cache = new PhabricatorKeyValueDatabaseCache();
|
||||||
|
$conn_w = $cache->establishConnection('w');
|
||||||
|
|
||||||
|
queryfx(
|
||||||
|
$conn_w,
|
||||||
|
'DELETE FROM %T WHERE cacheCreated < %d
|
||||||
|
ORDER BY cacheCreated ASC LIMIT 100',
|
||||||
|
$cache->getTableName(),
|
||||||
|
time() - $ttl);
|
||||||
|
|
||||||
|
return $conn_w->getAffectedRows();
|
||||||
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -148,4 +148,63 @@ abstract class PhabricatorLiskDAO extends LiskDAO {
|
||||||
protected function getConnectionNamespace() {
|
protected function getConnectionNamespace() {
|
||||||
return self::getStorageNamespace().'_'.$this->getApplicationName();
|
return self::getStorageNamespace().'_'.$this->getApplicationName();
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Break a list of escaped SQL statement fragments (e.g., VALUES lists for
|
||||||
|
* INSERT, previously built with @{function:qsprintf}) into chunks which will
|
||||||
|
* fit under the MySQL 'max_allowed_packet' limit.
|
||||||
|
*
|
||||||
|
* Chunks are glued together with `$glue`, by default ", ".
|
||||||
|
*
|
||||||
|
* If a statement is too large to fit within the limit, it is broken into
|
||||||
|
* its own chunk (but might fail when the query executes).
|
||||||
|
*/
|
||||||
|
public static function chunkSQL(
|
||||||
|
array $fragments,
|
||||||
|
$glue = ', ',
|
||||||
|
$limit = null) {
|
||||||
|
|
||||||
|
if ($limit === null) {
|
||||||
|
// NOTE: Hard-code this at 1MB for now, minus a 10% safety buffer.
|
||||||
|
// Eventually we could query MySQL or let the user configure it.
|
||||||
|
$limit = (int)((1024 * 1024) * 0.90);
|
||||||
|
}
|
||||||
|
|
||||||
|
$result = array();
|
||||||
|
|
||||||
|
$chunk = array();
|
||||||
|
$len = 0;
|
||||||
|
$glue_len = strlen($glue);
|
||||||
|
foreach ($fragments as $fragment) {
|
||||||
|
$this_len = strlen($fragment);
|
||||||
|
|
||||||
|
if ($chunk) {
|
||||||
|
// Chunks after the first also imply glue.
|
||||||
|
$this_len += $glue_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ($len + $this_len <= $limit) {
|
||||||
|
$len += $this_len;
|
||||||
|
$chunk[] = $fragment;
|
||||||
|
} else {
|
||||||
|
if ($chunk) {
|
||||||
|
$result[] = $chunk;
|
||||||
|
}
|
||||||
|
$len = strlen($fragment);
|
||||||
|
$chunk = array($fragment);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if ($chunk) {
|
||||||
|
$result[] = $chunk;
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach ($result as $key => $fragment_list) {
|
||||||
|
$result[$key] = implode($glue, $fragment_list);
|
||||||
|
}
|
||||||
|
|
||||||
|
return $result;
|
||||||
|
}
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -0,0 +1,55 @@
|
||||||
|
<?php
|
||||||
|
|
||||||
|
final class LiskChunkTestCase extends PhabricatorTestCase {
|
||||||
|
|
||||||
|
public function testSQLChunking() {
|
||||||
|
$fragments = array(
|
||||||
|
'a', 'a',
|
||||||
|
'b', 'b',
|
||||||
|
'ccc',
|
||||||
|
'dd',
|
||||||
|
'e',
|
||||||
|
);
|
||||||
|
|
||||||
|
$this->assertEqual(
|
||||||
|
array(
|
||||||
|
'aa',
|
||||||
|
'bb',
|
||||||
|
'ccc',
|
||||||
|
'dd',
|
||||||
|
'e',
|
||||||
|
),
|
||||||
|
PhabricatorLiskDAO::chunkSQL($fragments, '', 2));
|
||||||
|
|
||||||
|
|
||||||
|
$fragments = array(
|
||||||
|
'a', 'a', 'a', 'XX', 'a', 'a', 'a', 'a'
|
||||||
|
);
|
||||||
|
|
||||||
|
$this->assertEqual(
|
||||||
|
array(
|
||||||
|
'a, a, a',
|
||||||
|
'XX, a, a',
|
||||||
|
'a, a',
|
||||||
|
),
|
||||||
|
PhabricatorLiskDAO::chunkSQL($fragments, ', ', 8));
|
||||||
|
|
||||||
|
|
||||||
|
$fragments = array(
|
||||||
|
'xxxxxxxxxx',
|
||||||
|
'yyyyyyyyyy',
|
||||||
|
'a', 'b', 'c',
|
||||||
|
'zzzzzzzzzz',
|
||||||
|
);
|
||||||
|
|
||||||
|
$this->assertEqual(
|
||||||
|
array(
|
||||||
|
'xxxxxxxxxx',
|
||||||
|
'yyyyyyyyyy',
|
||||||
|
'a, b, c',
|
||||||
|
'zzzzzzzzzz',
|
||||||
|
),
|
||||||
|
PhabricatorLiskDAO::chunkSQL($fragments, ', ', 8));
|
||||||
|
}
|
||||||
|
|
||||||
|
}
|
|
@ -1060,6 +1060,10 @@ final class PhabricatorBuiltinPatchList extends PhabricatorSQLPatchList {
|
||||||
'type' => 'sql',
|
'type' => 'sql',
|
||||||
'name' => $this->getPatchPath('20121209.xmacromigratekey.sql'),
|
'name' => $this->getPatchPath('20121209.xmacromigratekey.sql'),
|
||||||
),
|
),
|
||||||
|
'20121220.generalcache.sql' => array(
|
||||||
|
'type' => 'sql',
|
||||||
|
'name' => $this->getPatchPath('20121220.generalcache.sql'),
|
||||||
|
),
|
||||||
);
|
);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
Loading…
Reference in a new issue