Summary: See PHI176. This is issued periodically by the garbage collector. Normally this table is relatively small-ish so this missing key isn't hugely noticeable.
Test Plan:
Ran `./bin/garbage collect --collector daemon.processes --trace` to get the query the GC runs.
Ran ##DELETE FROM `daemon_logevent` WHERE epoch < 1508443504 LIMIT 100## before and after the key, saw a much better query plan afterward:
Before:
```
mysql> explain DELETE FROM `daemon_logevent` WHERE epoch < 1508443504 LIMIT 100;
+----+-------------+-----------------+------+---------------+------+---------+------+-------+-------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-----------------+------+---------------+------+---------+------+-------+-------------+
| 1 | SIMPLE | daemon_logevent | ALL | NULL | NULL | NULL | NULL | 19325 | Using where |
+----+-------------+-----------------+------+---------------+------+---------+------+-------+-------------+
1 row in set (0.00 sec)
```
After:
```
mysql> explain DELETE FROM `daemon_logevent` WHERE epoch < 1508443504 LIMIT 100;
+----+-------------+-----------------+-------+---------------+-----------+---------+-------+------+-------------+
| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-----------------+-------+---------------+-----------+---------+-------+------+-------------+
| 1 | SIMPLE | daemon_logevent | range | key_epoch | key_epoch | 4 | const | 1 | Using where |
+----+-------------+-----------------+-------+---------------+-----------+---------+-------+------+-------------+
1 row in set (0.00 sec)
```
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18733
Summary: See PHI176. We issue a query with only `artifactIndex` from `BuildTarget`, but don't have an applicable key.
Test Plan: This isn't on the normal Harbormaster execution path so I'm not 100% sure I have a local repro, but will confirm with customer.
Reviewers: amckinley
Reviewed By: amckinley
Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam
Differential Revision: https://secure.phabricator.com/D18732
Summary: See PHI177. Ref T12974. PonderQuestion was overlooked during the Ferret engine conversions.
Test Plan:
Ran migrations, searched for questions, got results:
{F5241185}
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12974
Differential Revision: https://secure.phabricator.com/D18736
Summary:
Ref T2543. When Harbormaster finishes builds and promotes a draft revision to review, we currently publish "Harbormaster requested review of...".
Instead, attribute this action to the author, since that's more natural and more useful.
Test Plan: Promoted a diff locally, saw it attributed to me rather than Harbormaster.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T2543
Differential Revision: https://secure.phabricator.com/D18730
Summary:
See PHI165. See D18715. These objects (projects, blogs) also need implementations now.
(I thought about making this method `abstract` or doing try/catch to maybe make this more robust, but I think this should be the end of it, and those changes have mild complexity/compatibility/risk issues.)
Test Plan: Changed `bin/search index` to index only one document of each type, ran `bin/search index --all --force`, saw no more comment-related errors.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18729
Summary:
Ref T12974. Ferret object queries SELECT a virtual "_ft_rank" column for relevance ordering.
Currently, they always SELECT this column. That's fine and doesn't hurt anything, but makes developing and debugging things kind of a pain since every query has this `, blah blah _ft_rank` junk.
Instead, construct this column only if we're actually going to use it.
Mostly, this cleans up DarkConsole / query logs a bit.
Test Plan:
Viewed normal query results on various pages, viewed global search results, ordered Maniphest tasks by normal stuff and by "Relevance".
Viewed DarkConsole, saw no more "_ft_rank" junk on normal pages.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12974
Differential Revision: https://secure.phabricator.com/D18728
Summary: Ref T12680. Use the slightly sleeker construction from D18722 in Differential.
Test Plan: Viewed revision list, reordered by date modified.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12680
Differential Revision: https://secure.phabricator.com/D18727
Summary:
Ref T12680. See PHI167. See that task for discussion.
Rewrite `DiffusionCommitQuery` to work more like `DifferentialRevisionQuery`, and use a UNION to find "all revisions you need to audit OR respond to".
I tried to get this working a little more cleanly than RevisionQuery does, and can probably simplify that now.
Test Plan: Poked at the UI locally without hitting any apparent issues, but my local data is pretty garbage at this point. I'll take a look at how the query plans work on `secure`.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12680
Differential Revision: https://secure.phabricator.com/D18722
Summary:
Ref T2543. When a revision is created, we check if any builds are waiting/failed, and submit it for review immediately if we aren't waiting for anything.
In doing this, we ignore builds with only autotargets, since these are client-side and failures from local `arc lint` / `arc unit` should not count (the user has already chosen to ignore/skip them).
The way we do this has some issues:
- Herald may have started builds, but they may still be PENDING and not have any targets yet. In this case, we'll see "no non-autotargets" and ignore the build, which is wrong.
- We have to load targets but don't really care about them, which is more work than we really need to do.
- And it's kind of complex, too.
Instead, just let `BuildQuery` filter out "autobuilds" (builds generated from autoplans) with a JOIN.
Test Plan: Ran `arc diff` with builds configured, got a clean "Draft" state instead of an incorrect promotion directly to "Needs Review".
Reviewers: amckinley
Reviewed By: amckinley
Subscribers: PHID-OPKG-gm6ozazyms6q6i22gyam
Maniphest Tasks: T2543
Differential Revision: https://secure.phabricator.com/D18721
Summary:
See PHI158. In the RefEngine, we test if any old branch positions have been removed from the repository. This is uncommon (but not impossible) in Mercurial, and corresponds to users deleting branches in Git.
Currently, we end up running `hg log` for each position, in parallel. Because of Python's large startup overhead, this can be resource intensive for repositories with a large number of branches.
We have to do this in the general case because the caller may be asking us to resolve `tip`, `newfeature`, `tip~3`, `9`, etc. However, in the specific case where the refs are 40-digit hashes, we can bulk resolve them if they exist, like this:
```
hg log ... --rev (abcd or def0 or ab12 or ...)
```
In the general case, we could probably do less of this than we currently do (instead of testing all old heads, we could prune the list by removing commits which we know are still pointed to by current heads) but that's a slightly more involved change and the effect here is already dramatic.
Test Plan:
Verified that CPU usage drops from ~110s -> ~0.9s:
Before:
```
epriestley@orbital ~/dev/phabricator $ time ./bin/repository refs nss
Updating refs in "nss"...
Done.
real 0m14.676s
user 1m24.714s
sys 0m21.645s
```
After:
```
epriestley@orbital ~/dev/phabricator $ time ./bin/repository refs nss
Updating refs in "nss"...
Done.
real 0m0.861s
user 0m0.882s
sys 0m0.213s
```
- Manually resolved `blue`, `tip`, `9`, etc., got expected results.
- Tried to resolve invalid hashes, got expected result (no resolution).
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18717
Summary: Most of this document is no longer relevant, since we're happy to work on prototypes if you're paying us and no longer have any meaningful free support.
Test Plan: Read document.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18719
Summary: See rPcd14194a329788d5fff6365bcade278fd18f3612 for a similar change. Implement `getApplicationTransactionCommentObject()` to return `null` explicitly.
Test Plan: Ran `bin/search index --type ownerspackage`, got indexing after change.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18715
Summary: Ref T2543. When revisions are in the draft state, tell the user what we're waiting for or why they aren't moving forward.
Test Plan: {F5228840}
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T2543
Differential Revision: https://secure.phabricator.com/D18714
Summary: Ref T2543. This is a less ambitious version of the rule in D18628, which I backed off from, since I think this probably still has a fair number of loose ends to tie up.
Test Plan: Created a revision locally.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T2543
Differential Revision: https://secure.phabricator.com/D18713
Summary:
Ref T13000. Since other changes have generally made the ngrams table manageable, I'm not planning to enable common ngrams by default at this time.
Instead, make the threshold configurable with "--threshold" so we can guide installs through tuning this if they want (e.g. PHI110), and tune hosted instances.
(This might eventually become automatic, but just smoothing this bit off for now feels reasonable to me.)
Test Plan: Ran with `--reset`, and with various invalid and valid `--threshold` arguments.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18710
Summary:
Ref T13008. We haven't hit any issues with this, but I can imagine we might in the future.
When one host makes an intracluster request to another host, the `$viewer` ends up as the omnipotent viewer. This viewer isn't logged in, so they'll currently accumulate rate limit points at a high rate.
Instead, don't give them any points. These requests are always legitimate, and if they originated from a user request, that request should be the one getting rate limited.
Test Plan: Browsed around.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13008
Differential Revision: https://secure.phabricator.com/D18708
Summary:
Ref T13000. The new approach for dumping database-by-database means that we don't get CREATE DATABASE or USE statements, which makes importing the dump again inconvenient.
Manually stitch these into the dump.
Test Plan:
- Used `bin/storage dump --namespace ...` to dump a smaller local instance.
- Used `bin/storage destroy --namespace ...`, to destroy the namespace, then inported the dump cleanly.
- Verified that each CREATE DATABASE statement appears only once.
- Verified that `bin/storage renamespace --live` can correctly process this file.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18707
Summary: See PHI147.
Test Plan: Called the method from the web UI, got sensible results.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18706
Summary:
Depends on D18702. Ref T13008. This replaces the old hard-coded single rate limit with multiple flexible limits, and defines two types of limits:
- Rate: reject requests if a client has completed too many requests recently.
- Connection: reject requests if a client has too many more connections than disconnections recently.
The connection limit adds +1 to the score for each connection, then adds -1 for each disconnection. So the overall number is how many open connections they have, at least approximately.
Supporting multiple limits will let us do limiting by Hostname and by remote address (e.g., a specific IP can't exceed a low limit, and all requests to a hostname can't exceed a higher limit).
Configuring the new limits looks something like this:
```
PhabricatorStartup::addRateLimit(new PhabricatorClientRateLimit())
->setLimitKey('rate')
->setClientKey($_SERVER['REMOTE_ADDR'])
->setLimit(5);
PhabricatorStartup::addRateLimit(new PhabricatorClientConnectionLimit())
->setLimitKey('conn')
->setClientKey($_SERVER['REMOTE_ADDR'])
->setLimit(2);
```
Test Plan:
- Configured limits as above.
- Made a lot of requests, got cut off by the rate limit.
- Used `curl --limit-rate -F 'data=@the_letter_m.txt' ...` to upload files really slowly. Got cut off by the connection limit. With `enable_post_data_reading` off, this correctly killed the connections //before// the uploads finished.
- I'll send this stuff to `secure` before production to give it more of a chance.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13008
Differential Revision: https://secure.phabricator.com/D18703
Summary:
Ref T13008. Depends on D18701. The overall goal here is to make turning `enable_post_data_reading` off not break things, so we can run rate limiting checks before we read file uploads.
The biggest blocker for this is that turning it off stops `$_FILES` from coming into existence.
This //appears// to mostly work. Specifically:
- Skip the `max_post_size` check when POST is off, since it's meaningless.
- Don't read or scrub $_POST at startup when POST is off.
- When we rebuild REQUEST and POST before processing requests, do multipart parsing if we need to and rebuild FILES.
- Skip the `is_uploaded_file()` check if we built FILES ourselves.
This probably breaks a couple of small things, like maybe `__profile__` and other DarkConsole triggers over POST, and probably some other weird stuff. The parsers may also need more work than they've received so far.
I also need to verify that this actually works (i.e., lets us run code without reading the request body) but I'll include that in the change where I update the actual rate limiting.
Test Plan:
- Disabled `enable_post_data_reading`.
- Uploaded a file with a vanilla upload form (project profile image).
- Uploaded a file with drag and drop.
- Used DarkConsole.
- Submitted comments.
- Created a task.
- Browsed around.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13008
Differential Revision: https://secure.phabricator.com/D18702
Summary:
Ref T13000. Garbage collecting common ngrams is slow because MySQL isn't all that great at deleting rows quickly. See PHI96, where it looks like it's going to take a week to GC ngrams for a ~million objects at a relatively conservative 0.15 threshold.
In the event of a restore, we can reduce the impact by persisting this table so the ngrams just don't get built when the reindex happens.
Test Plan: Viewed schema in Config, saw common ngrams tables marked as "Data" instead of "Index".
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18696
Summary: Noticed a couple of typos in the docs, and then things got out of hand.
Test Plan:
- Stared at the words until my eyes watered and the letters began to swim on the screen.
- Consulted a dictionary.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: epriestley, yelirekim, PHID-OPKG-gm6ozazyms6q6i22gyam
Differential Revision: https://secure.phabricator.com/D18693
Summary:
Ref PHI109. Ref T11786. We currently test elapsed time every 64 iterations (since iterations are normally very fast), but at least one install is seeing the page timeout after 30 seconds.
One reason could be that cache fills may occur, and are likely to be much slower than normal iterations. In an extreme case, we could do 64 cache fills before checking the time. Tweak thing so that we always check the time after doing a cache fill, regardless of how many iterations have elapsed since the last attempt.
Additionally, this API method currently accepts an arbitrary number of paths, but implicitly limits each cache query to 500ms. If more than 60 paths are passed, this may exceed 30s. Only let the cache churn for a maximum of 10s across all paths.
If this is more the latter issue than the former, this might replace the GraphCache timeouts with `git` timeouts, but at least our understanding of what's going on here will improve.
Test Plan: This is difficult to test convincingly locally, since I can't reproduce the original issue. It still works after these changes, but it worked fine before these changes too.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T11786
Differential Revision: https://secure.phabricator.com/D18692
Summary:
Ref T13000. Currently, queries can only be executed from the web UI, which requires logging in as a user. I really want to avoid doing that wherever we can, but being able to execute queries on an instance (and, particularly, see the ngrams and timings on the underlying lookups) would have been helpful in several cases.
Improve tooling a bit in advance of the "common ngrams" stuff going out since it seems likely that it will be useful if issues arise.
Test Plan: Ran `bin/search query --query ...`, got useful minimal output. Ran with `--trace` to get internals.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18690
Summary:
Ref T13000. After an ngram is marked as "common", we can delete it from the storage table.
Currently, the only way to get ngrams marked as "common" is to manually run `bin/search ngrams`, so this has no impact on normal installs.
Test Plan: Ran `bin/garbage collect`, saw it start chewing through my local Maniphest ngrams table and removing common ngrams.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18687
Summary:
Ref T13000. This marks each table as either "data" (normal data), "cache" (automatically rebuilt, no need to ever dump) or "index" (can be manually rebuilt).
By default, `bin/storage dump` dumps data and index tables, but not cache tables.
With `--no-indexes`, it dumps only data tables. Indexes can be rebuilt after a restore with `bin/search index --all ...`.
Test Plan:
- Ran `--no-indexes` and normal dumps with `--trace`, verified that cache and index (former case) or cache only (latter case) tables were dumped with `--no-data`.
- Verified dump has the same number of `CREATE TABLE` statements as before the changes.
- Reviewed persistence tags in the web UI (note Ferret engine tables are "Index"):
{F5210886}
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18682
Summary:
Ref T13000. This allows us to be more selective about which tables we dump data for, to reduce the size of backups and exports. The immediate goal is to make large `ngrams` tables more manageable in the cluster, but this generally makes all backups and exports faster and easier.
Here, tables are dumped one at a time. A followup change will sometimes add the `--no-data` flag, to skip dumping readthrough caches and (optionally) rebuildable indexes.
Test Plan: Compared a dump from `master` and from this branch, found them to be essentially identical. The new dump has a little more header information in each section. Verified each contains the same number of `CREATE TABLE` statements.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18679
Summary: See PHI118. Enables hovercards to support peeking at tags and other details if you, e.g., create numerous identical subtasks of each task.
Test Plan: {F5210816}
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18681
Summary:
If `account.editable` is set to false, we try to add a `null` button and fatal:
> Argument 1 passed to PHUIHeaderView::addActionLink() must be an instance of PHUIButtonView, null given, called in /srv/phabricator/phabricator/src/applications/settings/panel/PhabricatorSettingsPanel.php on line 290
Instead, don't try to render `null` as a button.
Test Plan:
- Configured `account.editable` false.
- Viewed email address settings.
- Before: fatal.
- After: page works, no button is provided.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18677
Summary:
Depends on D18672. Ref T13000. This does an on-demand build of the common ngrams table.
Plan here is:
- Push to `secure`.
- Build the common ngrams table here.
- See if stuff breaks?
If it looks okay on this dataset, we can build out the GC support and try it in production.
Test Plan:
- Locally, my dataset has a bunch of `bin/lipsum` tasks with similar, common words.
- Verified that ipsum terms now skip ngrams. For "lorem ipsum" search performance actually IMPROVED by skipping the ngrams table (12s to 9s).
- Queried for normal terms, got very fast results using the ngram table, as normal.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18673
Summary:
Ref T13000. This adds support for tracking "common" ngrams, which occur in too many documents to be useful as part of the ngram index.
If an ngram is listed in the "common" table, it won't be written when indexing documents, or queried for when searching for them.
In this change, nothing actually writes to the "common" table. I'll start writing to the table in a followup change.
Specifically, I plan to do this:
- A new GC process updates the "common" table periodically, by writing ngrams which appear in more than X% of documents to it, for some value of X, if there are at least a minimum number of documents (maybe like 4,000).
- A new GC process deletes ngrams that have been added to the common table from the existing indexes.
Hopefully, this will pare down the ngrams index to something reasonable over time without requiring any manual tuning.
Test Plan:
- Ran some queries and indexes.
- Manually inserted ngrams `xxx` and `yyy` into the ngrams table, searched and indexed, saw them ignored as viable ngrams for search/index.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T13000
Differential Revision: https://secure.phabricator.com/D18672
Summary:
See PHI112. The install presumably wants to generate links to Diffusion commits from an external tool, but only knows the short name of the repository.
Provide a `/source/phabricator/commit/abcdef908273` URI which redirects to the canonical URI for the commit.
Test Plan:
- Visited `/source/` URI for a commit, got a redirect.
- Visited normal URI for a commit, got a commit page.
- Visited `/branches/` and `/tags/` for a `/source/` repository, got proper pages.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18676
Summary:
See PHI94. I considered this initially but wasn't sure about it. However, PHI94 brings up the good point that we already use a similar rule in Maniphest.
For consistency, only show visible columns here too.
Test Plan: Used "Move tasks to column..." on a board with visible and hidden columns, only saw visbile columns offered in the dropdown.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18668
Summary:
See <https://discourse.phabricator-community.org/t/daemons-tasks-crashing-in-a-loop-during-reindex/506/1>. Some object types (for example, Passphrase Credentials) support indexing but not commenting.
Make `withComments(...)` work properly if the transaction type does not support comments.
Test Plan:
Indexed a credential (no comments) and a revision (comments) with `bin/search index --trace ...`.
Before, credential fataled.
After, credetial succeeds, and skips the transaction query.
Before and after, the revision queries the transaction table.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18667
Summary:
Ref T5523. See PHI50. See PHI40. This isn't perfect, but should improve things.
Add a "Move tasks to column..." action to workboards which moves all visible tasks in a column to another column, either on the same board or on a different board.
This is a two-step process so that I don't have to write Javascript, and because I'm not 100% sure this is what users actually want/need. If it sticks, the UI could be refined later.
- The first dialog asks you to choose a project, defaulting ot the current project.
- The second dialog asks you to choose a column on that project's board.
Test Plan:
- Moved tasks on the same board.
- Moved tasks to a different board.
- Tried to move tasks to the starting column, got a sensible error.
- Tried to move tasks to no project, got a sensible error.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T5523
Differential Revision: https://secure.phabricator.com/D18665
Summary:
Ref PHI91. When Owners (or Herald, or manual user action) adds package reviewers to a revision, later updates to the revision make some of them less relevant or irrelevant.
Provide a hint when a package reviewer doesn't own any of the paths that a diff changes. Humans can then decide if the reviewer is obsolete/irrelevant or not.
This is a rough cut to get the feature working, design could probably use some tweaking if it sticks.
Test Plan: {F5204309}
Reviewers: amckinley
Reviewed By: amckinley
Subscribers: jboning
Differential Revision: https://secure.phabricator.com/D18663
Summary:
Ref PHI101. It looks like this was maybe copy/pasted by mistake in recent design refactoring.
We need to pass the full path, not the `basename()` of the path, to the search form.
Test Plan: Searched inside `scripts/test/`, found results inside `scripts/test/`.
Reviewers: amckinley
Reviewed By: amckinley
Differential Revision: https://secure.phabricator.com/D18664
Summary:
Ref T12997. Although we can't query by transaction type (since we can't easily enumerate all possible types which may have comments -- inline types may also have comments), we //can// just check if there's a comment row or not.
This reduces the amount of garbage we need to load to rebuild indexes for unusual objects with hundreds and hundreds of mentions.
Test Plan:
- Used batch editor to mention a task 700 times.
- Indexed it before and after this change, saw index time drop from {nav 1600ms > 160ms}.
- Made some new comments on it, verified that they still indexed/queried properly.
- Browsed around, made normal transactions, made inline comments.
- Added a unique word to an inline comment, indexed revision, searched for word, found revision.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12997
Differential Revision: https://secure.phabricator.com/D18660
Summary:
Ref T12997. See that task for more details. Briefly, an unusual dataset (where commits are mentioned hundreds of times by other commits) is causing some weird memory behavior in the daemons.
Forcing PHP to GC cycles explicitly after each task completes seems to help with this, by cleaning up some of the memory between tasks. A more thorough fix might be to untangle the `$xactions` structure, but that's significantly more involved.
Test Plan:
- Did this locally in a controlled environment, saw an immediate collection of a 500MB `$xactions` cycle.
- Put a similar change in production, memory usage seemed less to improve. It's hard to tell for sure that this does anything, but it shouldn't hurt.
Reviewers: amckinley
Reviewed By: amckinley
Maniphest Tasks: T12997
Differential Revision: https://secure.phabricator.com/D18657
