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Empty iterables should count towards cache usage. (#9028)

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Patrick Cloke 2021-01-06 12:33:20 -05:00 • committed by GitHub
parent 0312266ee3
commit 1b4d5d6acf
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3 changed files with 53 additions and 25 deletions
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synapse/util/caches/deferred_cache.py
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@ -105,7 +105,7 @@ class DeferredCache(Generic[KT, VT]):
keylen=keylen,
cache_name=name,
cache_type=cache_type,
size_callback=(lambda d: len(d)) if iterable else None,
size_callback=(lambda d: len(d) or 1) if iterable else None,
metrics_collection_callback=metrics_cb,
apply_cache_factor_from_config=apply_cache_factor_from_config,
) # type: LruCache[KT, VT]