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Add hacky cache factor override system

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Erik Johnston 2018-02-21 20:49:55 +00:00 • committed by Richard van der Hoff
parent 5dbf305444
commit 042eedfa2b
4 changed files with 18 additions and 4 deletions
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10
synapse/util/caches/__init__.py
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@ -22,6 +22,16 @@ import six
CACHE_SIZE_FACTOR = float(os.environ.get("SYNAPSE_CACHE_FACTOR", 0.5))
def get_cache_factor_for(cache_name):
env_var = "SYNAPSE_CACHE_FACTOR_" + cache_name.upper()
factor = os.environ.get(env_var)
if factor:
return float(factor)
return CACHE_SIZE_FACTOR
caches_by_name = {}
collectors_by_name = {}

4
synapse/util/caches/descriptors.py
View file

@ -17,7 +17,7 @@ import logging
from synapse.util.async import ObservableDeferred
from synapse.util import unwrapFirstError, logcontext
from synapse.util.caches import CACHE_SIZE_FACTOR
from synapse.util.caches import get_cache_factor_for
from synapse.util.caches.lrucache import LruCache
from synapse.util.caches.treecache import TreeCache, iterate_tree_cache_entry
from synapse.util.stringutils import to_ascii
@ -313,7 +313,7 @@ class CacheDescriptor(_CacheDescriptorBase):
orig, num_args=num_args, inlineCallbacks=inlineCallbacks,
cache_context=cache_context)
max_entries = int(max_entries * CACHE_SIZE_FACTOR)
max_entries = int(max_entries * get_cache_factor_for(orig.__name__))
self.max_entries = max_entries
self.tree = tree