Commit Graph

246 Commits

Author SHA1 Message Date
Richard van der Hoff
7ee94fc1ba Log which cache is throwing exceptions 2018-09-26 12:43:08 +01:00
Erik Johnston
3baf6e1667 Fix ExpiringCache.__len__ to be accurate
It used to try and produce an estimate, which was sometimes negative.
This caused metrics to be sad, so lets always just calculate it from
scratch.

(This appears to have been a longstanding bug, but one which has been made more
of a problem by #3932 and #3933).

(This was originally done by Erik as part of #3933. I'm cherry-picking it
because really it's a fix in its own right)
2018-09-26 12:32:29 +01:00
Erik Johnston
19dc676d1a Fix ExpiringCache.__len__ to be accurate
It used to try and produce an estimate, which was sometimes negative.
This caused metrics to be sad, so lets always just calculate it from
scratch.
2018-09-21 16:25:42 +01:00
Erik Johnston
fdd1a62e8d Add a five minute cache to get_destination_retry_timings
Hopefully helps with #3931
2018-09-21 14:56:12 +01:00
Erik Johnston
79eded1ae4 Make ExpiringCache slightly more performant 2018-09-21 14:52:21 +01:00
Erik Johnston
8601c24287 Fix some instances of ExpiringCache not expiring cache items
ExpiringCache required that `start()` be called before it would actually
start expiring entries. A number of places didn't do that.

This PR removes `start` from ExpiringCache, and automatically starts
backround reaping process on creation instead.
2018-09-21 14:19:46 +01:00
Amber Brown
b37c472419
Rename async to async_helpers because async is a keyword on Python 3.7 (#3678) 2018-08-10 23:50:21 +10:00
Richard van der Hoff
a8cbce0ced fix invalidation 2018-07-27 16:17:17 +01:00
Richard van der Hoff
f102c05856 Rewrite cache list decorator
Because it was complicated and annoyed me. I suspect this will be more
efficient too.
2018-07-27 13:47:04 +01:00
Richard van der Hoff
03751a6420 Fix some looping_call calls which were broken in #3604
It turns out that looping_call does check the deferred returned by its
callback, and (at least in the case of client_ips), we were relying on this,
and I broke it in #3604.

Update run_as_background_process to return the deferred, and make sure we
return it to clock.looping_call.
2018-07-26 11:48:08 +01:00
Richard van der Hoff
667fba68f3 Run things as background processes
This fixes #3518, and ensures that we get useful logs and metrics for lots of
things that happen in the background.

(There are certainly more things that happen in the background; these are just
the common ones I've found running a single-process synapse locally).
2018-07-18 20:55:05 +01:00
Erik Johnston
b2aa05a8d6 Use efficient .intersection 2018-07-17 11:07:04 +01:00
Erik Johnston
547b1355d3 Fix perf regression in PR #3530
The get_entities_changed function was changed to return all changed
entities since the given stream position, rather than only those changed
from a given list of entities. This resulted in the function incorrectly
returning large numbers of entities that, for example, caused large
increases in database usage.
2018-07-17 10:27:51 +01:00
Erik Johnston
77b692e65d Don't return unknown entities in get_entities_changed
The stream cache keeps track of all entities that have changed since
a particular stream position, so get_entities_changed does not need to
return unknown entites when given a larger stream position.

This makes it consistent with the behaviour of has_entity_changed.
2018-07-13 15:26:10 +01:00
Richard van der Hoff
fa5c2bc082 Reduce set building in get_entities_changed
This line shows up as about 5% of cpu time on a synchrotron:

    not_known_entities = set(entities) - set(self._entity_to_key)

Presumably the problem here is that _entity_to_key can be largeish, and
building a set for its keys every time this function is called is slow.

Here we rewrite the logic to avoid building so many sets.
2018-07-12 11:37:44 +01:00
Amber Brown
49af402019 run isort 2018-07-09 16:09:20 +10:00
Amber Brown
72d2143ea8
Revert "Revert "Try to not use as much CPU in the StreamChangeCache"" (#3454) 2018-06-28 11:04:18 +01:00
Matthew Hodgson
8057489b26
Revert "Try to not use as much CPU in the StreamChangeCache" 2018-06-26 18:09:01 +01:00
Amber Brown
1202508067 fixes 2018-06-26 17:29:01 +01:00
Amber Brown
bd3d329c88 fixes 2018-06-26 17:28:12 +01:00
Amber Brown
abfe4b2957 try and make loading items from the cache faster 2018-06-26 17:25:34 +01:00
Richard van der Hoff
43e02c409d Disable partial state group caching for wildcard lookups
When _get_state_for_groups is given a wildcard filter, just do a complete
lookup. Hopefully this will give us the best of both worlds by not filling up
the ram if we only need one or two keys, but also making the cache still work
for the federation reader usecase.
2018-06-22 11:52:07 +01:00
Amber Brown
f7869f8f8b
Port to sortedcontainers (with tests!) (#3332) 2018-06-06 00:13:57 +10:00
Erik Johnston
042eedfa2b Add hacky cache factor override system 2018-06-04 15:39:28 +01:00
Amber Brown
c936a52a9e
Consistently use six's iteritems and wrap lazy keys/values in list() if they're not meant to be lazy (#3307) 2018-05-31 19:03:47 +10:00
Amber Brown
debff7ae09
Merge pull request #3281 from NotAFile/py3-six-isinstance
remaining isintance fixes
2018-05-30 12:44:46 +10:00
Amber Brown
357c74a50f add comment about why unreg 2018-05-28 19:14:41 +10:00
Amber Brown
754826a830 Merge remote-tracking branch 'origin/develop' into 3218-official-prom 2018-05-28 18:57:23 +10:00
Adrian Tschira
dd068ca979 remaining isintance fixes
Signed-off-by: Adrian Tschira <nota@notafile.com>
2018-05-24 20:55:08 +02:00
Amber Brown
071206304d cleanup pep8 errors 2018-05-22 16:54:22 -05:00
Amber Brown
85ba83eb51 fixes 2018-05-22 16:28:23 -05:00
Amber Brown
df9f72d9e5 replacing portions 2018-05-21 19:47:37 -05:00
Adrian Tschira
73cbdef5f7 fix py3 intern and remove unnecessary py3 encode
Signed-off-by: Adrian Tschira <nota@notafile.com>
2018-05-19 17:35:31 +02:00
Richard van der Hoff
11a67b7c9d
Merge pull request #3093 from matrix-org/rav/response_cache_wrap
Refactor ResponseCache usage
2018-04-20 11:31:17 +01:00
Richard van der Hoff
d3347ad485 Revert "Use sortedcontainers instead of blist"
This reverts commit 9fbe70a7dc.

It turns out that sortedcontainers.SortedDict is not an exact match for
blist.sorteddict; in particular, `popitem()` removes things from the opposite
end of the dict.

This is trivial to fix, but I want to add some unit tests, and potentially some
more thought about it, before we do so.
2018-04-13 11:16:43 +01:00
Richard van der Hoff
60f6014bb7 ResponseCache: fix handling of completed results
Turns out that ObservableDeferred.observe doesn't return a deferred if the
result is already completed. Fix handling and improve documentation.
2018-04-13 07:32:29 +01:00
Richard van der Hoff
b78395b7fe Refactor ResponseCache usage
Adds a `.wrap` method to ResponseCache which wraps up the boilerplate of a
(get, set) pair, and then use it throughout the codebase.

This will be largely non-functional, but does include the following functional
changes:

* federation_server.on_context_state_request: drops use of _server_linearizer
  which looked redundant and could cause incorrect cache misses by yielding
  between the get and the set.
* RoomListHandler.get_remote_public_room_list(): fixes logcontext leaks
* the wrap function includes some logging. I'm hoping this won't be too noisy
  on production.
2018-04-12 13:02:15 +01:00
Richard van der Hoff
d5c74b9f6c
Merge pull request #3092 from matrix-org/rav/response_cache_metrics
Add metrics for ResponseCache
2018-04-12 12:59:36 +01:00
Richard van der Hoff
261124396e
Merge pull request #3059 from matrix-org/rav/doc_response_cache
Document the behaviour of ResponseCache
2018-04-12 11:22:30 +01:00
Richard van der Hoff
b3384232a0 Add metrics for ResponseCache 2018-04-10 23:14:47 +01:00
Vincent Breitmoser
9fbe70a7dc Use sortedcontainers instead of blist
This commit drop-in replaces blist with SortedContainers. They are
written in pure python so work with pypy, but perform as good as
native implementations, at least in a couple benchmarks:

http://www.grantjenks.com/docs/sortedcontainers/performance.html
2018-04-10 11:29:51 +02:00
Richard van der Hoff
01afc563c3 Fix overzealous cache invalidation
Fixes an issue where a cache invalidation would invalidate *all* pending
entries, rather than just the entry that we intended to invalidate.
2018-04-05 16:24:04 +01:00
Richard van der Hoff
a9a74101a4 Document the behaviour of ResponseCache
it looks like everything that uses ResponseCache expects to have to
`make_deferred_yieldable` its results. It's debatable whether that is the best
approach, but let's document it for now to avoid further confusion.
2018-04-04 09:06:22 +01:00
Erik Johnston
9a0d783c11 Add comments 2018-03-19 11:35:53 +00:00
Erik Johnston
7c7706f42b Fix bug where state cache used lots of memory
The state cache bases its size on the sum of the size of entries. The
size of the entry is calculated once on insertion, so it is important
that the size of entries does not change.

The DictionaryCache modified the entries size, which caused the state
cache to incorrectly think it was smaller than it actually was.
2018-03-15 15:46:54 +00:00
Richard van der Hoff
bc496df192 report metrics on number of cache evictions 2018-02-05 15:34:01 +00:00
Erik Johnston
495f075b41 Increase default cache factor size. 2017-07-04 09:58:32 +01:00
Erik Johnston
b5e8d529e6 Define CACHE_SIZE_FACTOR once 2017-07-04 09:56:44 +01:00
Erik Johnston
c72058bcc6 Use an ExpiringCache for storing registration sessions
This is because pruning them was a significant performance drain on
matrix.org
2017-06-29 14:08:37 +01:00
Erik Johnston
efc2b7db95 Rewrite conditional 2017-06-09 13:35:15 +01:00
Erik Johnston
eed59dcc1e Fix has_any_entity_changed
Occaisonally has_any_entity_changed would throw the error: "Set changed
size during iteration" when taking the max of the `sorteddict`. While
its uncertain how that happens, its quite inefficient to iterate over
the entire dict anyway so we change to using the more traditional
`bisect_*` functions.
2017-06-09 11:44:01 +01:00
Erik Johnston
304880d185 Add stream change cache 2017-05-31 15:46:36 +01:00
Erik Johnston
bd7bb5df71 Pull out if statement from for loop 2017-05-22 15:12:19 +01:00
Erik Johnston
e3417a06e2 Update list cache to handle one arg case
We update the normal cache descriptors to handle caches with a single
argument specially so that the key wasn't a 1-tuple. We need to update
the cache list to be aware of this.
2017-05-22 15:04:42 +01:00
Erik Johnston
bbfe4e996c Make get_state_groups_from_groups faster.
Most of the time was spent copying a dict to filter out sentinel values
that indicated that keys did not exist in the dict. The sentinel values
were added to ensure that we cached the non-existence of keys.

By updating DictionaryCache to keep track of which keys were known to
not exist itself we can remove a dictionary copy.
2017-05-17 15:12:15 +01:00
Erik Johnston
ffad4fe35b Don't update event cache hit ratio from get_joined_users
Otherwise the hit ration of plain get_events gets completely skewed by
calls to get_joined_users* functions.
2017-05-08 16:06:17 +01:00
Erik Johnston
d2d8ed4884 Optimise caches with single key 2017-05-04 14:18:46 +01:00
Erik Johnston
efab1dadde Remove DEBUG_CACHES 2017-04-25 10:54:09 +01:00
Erik Johnston
119cb9bbcf Reduce cache size by not storing deferreds
Currently the cache descriptors store deferreds rather than raw values,
this is a simple way of triggering only one database hit and sharing the
result if two callers attempt to get the same value.

However, there are a few caches that simply store a mapping from string
to string (or int). These caches can have a large number of entries,
under the assumption that each entry is small. However, the size of a
deferred (specifically the size of ObservableDeferred) is signigicantly
larger than that of the raw value, 2kb vs 32b.

This PR therefore changes the cache descriptors to store the raw values
rather than the deferreds.

As a side effect cached storage function now either return a deferred or
the actual value, as the cached list decriptor already does. This is
fine as we always end up just yield'ing on the returned value
eventually, which handles that case correctly.
2017-04-25 10:23:11 +01:00
Erik Johnston
d134d0935e Only intern ascii strings 2017-04-24 14:07:48 +01:00
Erik Johnston
4d17add8de Remove unused instance variable 2017-03-31 09:38:27 +01:00
Erik Johnston
6194a64ae9 Doc new instance variables 2017-03-30 14:19:10 +01:00
Erik Johnston
014fee93b3 Manually calculate cache key as getcallargs is expensive
This is because getcallargs recomputes the getargspec, amongst other
things, which we don't need to do as its already been done
2017-03-30 14:14:46 +01:00
Erik Johnston
86780a8bc3 Don't convert to deferreds when not necessary 2017-03-30 14:14:36 +01:00
Richard van der Hoff
f9b4bb05e0 Fix the logcontext handling in the cache wrappers (#2077)
The cache wrappers had a habit of leaking the logcontext into the reactor while
the lookup function was running, and then not restoring it correctly when the
lookup function had completed. It's all the fault of
`preserve_context_over_{fn,deferred}` which are basically a bit broken.
2017-03-30 13:22:24 +01:00
Richard van der Hoff
95f21c7a66 Fix caching of remote servers' signature keys
The `@cached` decorator on `KeyStore._get_server_verify_key` was missing
its `num_args` parameter, which meant that it was returning the wrong key for
any server which had more than one recorded key.

By way of a fix, change the default for `num_args` to be *all* arguments. To
implement that, factor out a common base class for `CacheDescriptor` and `CacheListDescriptor`.
2017-03-22 15:11:30 +00:00
Richard van der Hoff
29ed09e80a Fix assertion to stop transaction queue getting wedged
... and update some docstrings to correctly reflect the types being used.

get_new_device_msgs_for_remote can return a long under some circumstances,
which was being stored in last_device_list_stream_id_by_dest, and was then
upsetting things on the next loop.
2017-03-15 12:16:55 +00:00
Erik Johnston
3545e17f43 Add setdefault key to ExpiringCache 2017-03-10 10:30:49 +00:00
Erik Johnston
6b61060b51 Comment 2017-02-02 14:47:15 +00:00
Erik Johnston
9efcc3f3be Comment 2017-02-02 13:50:22 +00:00
Erik Johnston
c430111d0e Update LruCache size estimate on clear 2017-01-18 14:55:23 +00:00
Erik Johnston
380dba1020 Measure metrics of string_cache 2017-01-17 17:04:46 +00:00
Erik Johnston
37b4c7d8a9 Fix typo in return type 2017-01-17 14:43:32 +00:00
Erik Johnston
d6c75cb7c2 Rename and comment tree_to_leaves_iterator 2017-01-17 11:47:03 +00:00
Erik Johnston
1ccd5676e3 Remove needless call to evict() 2017-01-17 11:42:26 +00:00
Erik Johnston
f85b6ca494 Speed up cache size calculation
Instead of calculating the size of the cache repeatedly, which can take
a long time now that it can use a callback, instead cache the size and
update that on insertion and deletion.

This requires changing the cache descriptors to have two caches, one for
pending deferreds and the other for the actual values. There's no reason
to evict from the pending deferreds as they won't take up any more
memory.
2017-01-17 11:18:13 +00:00
Erik Johnston
6d00213e80 Use OrderedDict in ExpiringCache 2017-01-16 15:33:22 +00:00
Erik Johnston
46aebbbcbf Add support for 'iterable' to ExpiringCache 2017-01-16 14:57:23 +00:00
Erik Johnston
2fae34bd2c Optionally measure size of cache by sum of length of values 2017-01-13 17:46:17 +00:00
Erik Johnston
955f34d23e Change get_pos_of_last_change to return upper bound 2016-09-15 15:12:07 +01:00
Erik Johnston
cb3edec6af Use stream_change cache to make get_forward_extremeties_for_room cache more effective 2016-09-15 14:28:13 +01:00
Erik Johnston
45fd2c8942 Ensure invalidation list does not grow unboundedly 2016-08-19 16:09:16 +01:00
Erik Johnston
c0d7d9d642 Rename to on_invalidate 2016-08-19 15:13:58 +01:00
Erik Johnston
dc76a3e909 Make cache_context an explicit option 2016-08-19 15:02:38 +01:00
Erik Johnston
ba214a5e32 Remove lru option 2016-08-19 14:17:11 +01:00
Erik Johnston
4161ff2fc4 Add concept of cache contexts 2016-08-19 14:17:07 +01:00
Erik Johnston
248e6770ca Cache federation state responses 2016-07-21 10:30:12 +01:00
Erik Johnston
3b096c5f5c Merge branch 'erikj/cache_perf' of github.com:matrix-org/synapse into develop 2016-06-03 12:00:33 +01:00
Erik Johnston
58a224a651 Pull out update_results_dict 2016-06-03 11:47:07 +01:00
Erik Johnston
73c7112433 Change CacheMetrics to be quicker
We change it so that each cache has an individual CacheMetric, instead
of having one global CacheMetric. This means that when a cache tries to
increment a counter it does not need to go through so many indirections.
2016-06-03 11:26:52 +01:00
Erik Johnston
e043ede4a2 Small optimisation to CacheListDescriptor 2016-06-03 11:19:22 +01:00
Erik Johnston
597013caa5 Make cachedList go a bit faster 2016-06-03 11:13:29 +01:00
Erik Johnston
af03ecf352 Deduplicate joins 2016-04-07 14:19:02 +01:00
Mark Haines
87f2dec8d4 Make the cache objects be per instance rather than being global 2016-04-06 13:08:05 +01:00
Mark Haines
77cba688ed Fix typo 2016-03-24 18:02:37 +00:00
Mark Haines
191c7bef6b Deduplicate identical /sync requests 2016-03-24 17:47:31 +00:00
Erik Johnston
8122ad7bab Simplify intern_dict 2016-03-23 16:41:54 +00:00
Erik Johnston
acdfef7b14 Intern all the things 2016-03-23 16:25:54 +00:00
Erik Johnston
75daede92f String intern 2016-03-23 14:53:53 +00:00
Erik Johnston
c4a8cbd15a Make LruCache use a dedicated _Node class 2016-03-22 16:06:21 +00:00
Erik Johnston
a547e2df85 Return list, not generator. 2016-03-14 15:30:19 +00:00
Mark Haines
239badea9b Use syntax that works on both py2.7 and py3 2016-03-07 20:13:10 +00:00
Erik Johnston
374f9b2f07 Limit stream change cache size too 2016-03-01 13:30:15 +00:00
Erik Johnston
ce2cdced61 Move cache size fiddling to descriptors only. Fix tests 2016-03-01 13:21:46 +00:00
Erik Johnston
910fc0f28f Add enviroment variable SYNAPSE_CACHE_FACTOR, default it to 0.1 2016-03-01 12:56:39 +00:00
Erik Johnston
72165e5b77 Reraise exception 2016-03-01 11:00:10 +00:00
Erik Johnston
ff2d7551c7 Correct cache miss detection 2016-03-01 10:59:17 +00:00
Erik Johnston
278d6c0527 Report size of ExpiringCache 2016-02-23 16:46:21 +00:00
Erik Johnston
c77dae7a1a Change the way we figure out presence updates for small deltas 2016-02-23 14:54:40 +00:00
Erik Johnston
2c1fbea531 Fix up logcontexts 2016-02-08 14:26:45 +00:00
Daniel Wagner-Hall
d83d004ccd Fix flake8 warnings for new flake8 2016-02-02 17:18:50 +00:00
Erik Johnston
e70165039c If stream pos is greater then earliest known key and entity hasn't changed, then entity hasn't changed 2016-01-29 16:41:32 +00:00
Erik Johnston
18579534ea Prefill stream change caches 2016-01-29 14:37:59 +00:00
Erik Johnston
b18114e19e Merge pull request #536 from matrix-org/erikj/sync
Make /sync "better".
2016-01-29 13:04:51 +00:00
Erik Johnston
fb7299800f Directly set self.value 2016-01-29 11:29:14 +00:00
Erik Johnston
c046630c33 Remove spurious self.size 2016-01-29 11:17:54 +00:00
Erik Johnston
a30364c1f9 Correctly bookkeep the size of TreeCache 2016-01-29 10:44:46 +00:00
Erik Johnston
766526e114 Make TreeCache keep track of its own size. 2016-01-29 10:11:21 +00:00
Erik Johnston
50e18938a9 Reset size on clear 2016-01-29 10:00:45 +00:00
Erik Johnston
3f5dd18bd4 If the same as the earliest key, assume nothing has changed. 2016-01-28 18:11:41 +00:00
Erik Johnston
40431251cb Correctly update _entity_to_key 2016-01-28 18:05:43 +00:00
Erik Johnston
82cf3a8043 Fix inequalities 2016-01-28 17:44:04 +00:00
Erik Johnston
0663c5bd52 Include cache hits with has_entity_changed 2016-01-28 17:27:28 +00:00
Erik Johnston
45cf827c8f Change name and doc has_entity_changed 2016-01-28 16:39:18 +00:00
Erik Johnston
00cb3eb24b Cache tags and account data 2016-01-28 16:37:41 +00:00
Erik Johnston
c23a8c7833 Ensure keys to RoomStreamChangeCache are ints 2016-01-28 15:55:26 +00:00
Erik Johnston
e1941442d4 Invalidate caches properly. Remove unused arg 2016-01-28 15:02:41 +00:00
Erik Johnston
b97f6626b6 Add cache to room stream 2016-01-27 17:33:26 +00:00
David Baker
7cd418d38e Don't add the member functiopn if we're not using treecache 2016-01-22 13:40:37 +00:00
David Baker
cd80019eec docs 2016-01-22 12:21:13 +00:00
David Baker
d552861346 Revert all the bits changing keys of eeverything that used LRUCaches to tuples 2016-01-22 12:18:14 +00:00
David Baker
10f76dc5da Make LRU cache not default to treecache & add options to use it 2016-01-22 12:10:33 +00:00
David Baker
5b142788d2 Add __contains__ 2016-01-22 11:49:59 +00:00
David Baker
eaa836e8ca Docs for treecache 2016-01-22 11:47:22 +00:00
David Baker
8acc5cb60f Add invalidate_many here too 2016-01-22 11:22:32 +00:00
David Baker
330be18ec5 peppate 2016-01-21 19:17:32 +00:00
David Baker
f1f8122120 Change LRUCache to be tree-based so we can delete subtrees. 2016-01-21 19:16:25 +00:00
Matthew Hodgson
6c28ac260c copyrights 2016-01-07 04:26:29 +00:00
Mark Haines
d12c00bdc3 Add some docstring explaining the snapshot cache does 2015-12-23 15:18:11 +00:00
Mark Haines
7fa71e3267 Add a unit test for the snapshot cache 2015-12-23 11:48:03 +00:00
Mark Haines
9ac417fa88 Add a cache for initialSync responses that expires after 5 minutes 2015-12-22 18:27:56 +00:00
Erik Johnston
8e254862f4 Don't assume @cachedList function returns keys for everything 2015-08-18 11:11:33 +01:00
Erik Johnston
cfa62007a3 Docstring 2015-08-12 16:42:46 +01:00
Erik Johnston
d7451e0f22 Merge branch 'develop' of github.com:matrix-org/synapse into erikj/dictionary_cache 2015-08-12 10:30:30 +01:00
Erik Johnston
4807616e16 Wire up the dictionarycache to the metrics 2015-08-12 10:13:35 +01:00
Erik Johnston
2df8dd9b37 Move all the caches into their own package, synapse.util.caches 2015-08-11 18:00:59 +01:00