From 374f9b2f073a8d7832916cf1b17d6aacba235066 Mon Sep 17 00:00:00 2001 From: Erik Johnston Date: Tue, 1 Mar 2016 13:30:15 +0000 Subject: [PATCH] Limit stream change cache size too --- synapse/util/caches/stream_change_cache.py | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py index 970488a19c..a1aec7aa55 100644 --- a/synapse/util/caches/stream_change_cache.py +++ b/synapse/util/caches/stream_change_cache.py @@ -18,11 +18,15 @@ from synapse.util.caches import cache_counter, caches_by_name from blist import sorteddict import logging +import os logger = logging.getLogger(__name__) +CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1)) + + class StreamChangeCache(object): """Keeps track of the stream positions of the latest change in a set of entities. @@ -33,7 +37,7 @@ class StreamChangeCache(object): old then the cache will simply return all given entities. """ def __init__(self, name, current_stream_pos, max_size=10000, prefilled_cache={}): - self._max_size = max_size + self._max_size = int(max_size * CACHE_SIZE_FACTOR) self._entity_to_key = {} self._cache = sorteddict() self._earliest_known_stream_pos = current_stream_pos