diff options
Diffstat (limited to 'synapse/metrics/__init__.py')
| -rw-r--r-- | synapse/metrics/__init__.py | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/synapse/metrics/__init__.py b/synapse/metrics/__init__.py index 31b7b3c256..e671da26d5 100644 --- a/synapse/metrics/__init__.py +++ b/synapse/metrics/__init__.py @@ -535,6 +535,13 @@ class ReactorLastSeenMetric: REGISTRY.register(ReactorLastSeenMetric()) +# The minimum time in seconds between GCs for each generation, regardless of the current GC +# thresholds and counts. +MIN_TIME_BETWEEN_GCS = (1.0, 10.0, 30.0) + +# The time (in seconds since the epoch) of the last time we did a GC for each generation. +_last_gc = [0.0, 0.0, 0.0] + def runUntilCurrentTimer(reactor, func): @functools.wraps(func) @@ -575,11 +582,16 @@ def runUntilCurrentTimer(reactor, func): return ret # Check if we need to do a manual GC (since its been disabled), and do - # one if necessary. + # one if necessary. Note we go in reverse order as e.g. a gen 1 GC may + # promote an object into gen 2, and we don't want to handle the same + # object multiple times. threshold = gc.get_threshold() counts = gc.get_count() for i in (2, 1, 0): - if threshold[i] < counts[i]: + # We check if we need to do one based on a straightforward + # comparison between the threshold and count. We also do an extra + # check to make sure that we don't a GC too often. + if threshold[i] < counts[i] and MIN_TIME_BETWEEN_GCS[i] < end - _last_gc[i]: if i == 0: logger.debug("Collecting gc %d", i) else: @@ -589,6 +601,8 @@ def runUntilCurrentTimer(reactor, func): unreachable = gc.collect(i) end = time.time() + _last_gc[i] = end + gc_time.labels(i).observe(end - start) gc_unreachable.labels(i).set(unreachable) |