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Run things as background processes

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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).
This commit is contained in:
Richard van der Hoff 2018-07-18 14:35:24 +01:00
parent 65d6a0e477
commit 667fba68f3
7 changed files with 44 additions and 26 deletions
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6
synapse/util/caches/expiringcache.py
View file

@ -16,6 +16,7 @@
import logging
from collections import OrderedDict
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.util.caches import register_cache
logger = logging.getLogger(__name__)
@ -63,7 +64,10 @@ class ExpiringCache(object):
return
def f():
self._prune_cache()
run_as_background_process(
"prune_cache_%s" % self._cache_name,
self._prune_cache,
)
self._clock.looping_call(f, self._expiry_ms / 2)

4
synapse/util/distributor.py
View file

@ -75,6 +75,10 @@ class Distributor(object):
self.pre_registration[name].append(observer)
def fire(self, name, *args, **kwargs):
"""Dispatches the given signal to the registered observers.
Runs the observers as a background process. Does not return a deferred.
"""
if name not in self.signals:
raise KeyError("%r does not have a signal named %s" % (self, name))