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Merge pull request #1821 from matrix-org/erikj/cache_metrics_string_intern

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Measure metrics of string_cache
This commit is contained in:
Erik Johnston authored and GitHub committed 2017-01-18 10:57:39 +00:00
2 parents 15f012032c 380dba1020
commit f648313f98
1 file changed
+8 -3
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synapse/util/caches/__init__.py
+8 -3
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@@ -40,8 +40,8 @@ def register_cache(name, cache):
)
_string_cache = LruCache(int(5000 * CACHE_SIZE_FACTOR))
caches_by_name["string_cache"] = _string_cache
_string_cache = LruCache(int(100000 * CACHE_SIZE_FACTOR))
_stirng_cache_metrics = register_cache("string_cache", _string_cache)
KNOWN_KEYS = {
@@ -69,7 +69,12 @@ KNOWN_KEYS = {
def intern_string(string):
"""Takes a (potentially) unicode string and interns using custom cache
"""
return _string_cache.setdefault(string, string)
new_str = _string_cache.setdefault(string, string)
if new_str is string:
_stirng_cache_metrics.inc_hits()
else:
_stirng_cache_metrics.inc_misses()
return new_str
def intern_dict(dictionary):