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Limit stream change cache size too

This commit is contained in:
Erik Johnston 2016-03-01 13:30:15 +00:00
parent ce2cdced61
commit 374f9b2f07
1 changed files with 5 additions and 1 deletions
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6
synapse/util/caches/stream_change_cache.py
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@ -18,11 +18,15 @@ from synapse.util.caches import cache_counter, caches_by_name
from blist import sorteddict from blist import sorteddict
import logging import logging
import os
logger = logging.getLogger(__name__) logger = logging.getLogger(__name__)
CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.1))
class StreamChangeCache(object): class StreamChangeCache(object):
"""Keeps track of the stream positions of the latest change in a set of entities. """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. old then the cache will simply return all given entities.
""" """
def __init__(self, name, current_stream_pos, max_size=10000, prefilled_cache={}): 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._entity_to_key = {}
self._cache = sorteddict() self._cache = sorteddict()
self._earliest_known_stream_pos = current_stream_pos self._earliest_known_stream_pos = current_stream_pos