Summary:
Ref T11954. This reduces how much work we need to do to load settings, particularly for Conduit (which currently can not benefit directly from the user cache, because it loads the user indirectly via a token).
Specifically:
- Cache builtin defaults in the runtime cache. This means Phabricator may need to be restarted if you change a global setting default, but this is exceptionally rare.
- Cache global defaults in the mutable cache. This means we do less work to load them.
- Avoid loading settings classes if we don't have to.
- If we missed the user cache for settings, try to read it from the cache table before we actually go regenerate it (we miss on Conduit pathways).
Test Plan: Used `ab -n100 ...` to observe a ~6-10ms performance improvement for `user.whoami`.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T11954
Differential Revision: https://secure.phabricator.com/D16998
Summary:
Ref T4103. Ref T10078. This puts a user cache in front of notification and message counts.
This reduces the number of queries issued on every page by 4 (2x building the menu, 2x building Quicksand data).
Also fixes some minor issues:
- Daemons could choke on sending mail in the user's translation.
- No-op object updates could fail in the daemons.
- Questionable data access pattern in the file query coming out of the profile file cache.
Test Plan:
- Sent myself notifications. Saw count go up.
- Cleared them by visiting objects and clearing all notifications. Saw count go down.
- Sent myself messages. Saw count go up.
- Cleared them by visiting threads. Saw count go down.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103, T10078
Differential Revision: https://secure.phabricator.com/D16041
Summary:
Ref T4103. Ref T10078. This moves profile image caches to new usercache infrastructure.
These dirty automatically based on configuration and User properties, so add some stuff to make that happen.
This reduces the number of queries issued on every page by 1.
Test Plan: Browsed around, changed profile image, viewed as self, viewed as another user, verified no more query to pull this information on every page
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103, T10078
Differential Revision: https://secure.phabricator.com/D16040
Summary:
Ref T4103. Conpherence is doing some weird stuff and has its own redudnant settings object.
- Get rid of `ConpherenceSettings`.
- Use `getUserSetting()` instead of `loadPreferences()`.
- When applying transactions, add a new mechanism to efficiently prefill caches (this will still work anyway, but it's slower if we don't bulk-fetch).
Test Plan:
- Changed global Conpherence setting.
- Created a new Conpherence, saw setting set to global default.
- Changed local room setting.
- Submitted messages.
- Saw cache prefill for all particpiants in database.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103
Differential Revision: https://secure.phabricator.com/D16025
Summary:
Ref T4103. Currently, we issue a `SELECT * FROM user_preferences ... WHERE userPHID = ...` on every page to load the viewer's settings.
There are several other questionable data accesses on every page too, most of which could benefit from improved caching strategies (see T4103#178122).
This query will soon get more expensive, since it may need to load several objects (e.g., the user's settings and their "role profile" settings). Although we could put that data on the User and do both in one query, it's nicer to put it on the Preferences object ("This inherits from profile X") which means we need to do several queries.
Rather than paying a greater price, we can cheat this stuff into the existing query where we load the user's session by providing a user cache table and doing some JOIN magic. This lets us issue one query and try to get cache hits on a bunch of caches cheaply (well, we'll be in trouble at the MySQL JOIN limit of 61 tables, but have some headroom).
For now, just get it working:
- Add the table.
- Try to get user settings "for free" when we load the session.
- If we miss, fill user settings into the cache on-demand.
- We only use this in one place (DarkConsole) for now. I'll use it more widely in the next diff.
Test Plan:
- Loaded page as logged-in user.
- Loaded page as logged-out user.
- Examined session query to see cache joins.
- Changed settings, saw database cache fill.
- Toggled DarkConsole on and off.
Reviewers: chad
Reviewed By: chad
Maniphest Tasks: T4103
Differential Revision: https://secure.phabricator.com/D16001
