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[#1745] writecache: Set flush parameters based on max size

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Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>
This commit is contained in:
Evgenii Stratonikov 2022-09-01 09:33:56 +03:00 • committed by fyrchik
parent c04126f35e
commit e6cf0b3d42
2 changed files with 11 additions and 7 deletions
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6
pkg/local_object_storage/writecache/writecache.go
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@ -97,6 +97,12 @@ func New(opts ...Option) Cache {
opts[i](&c.options)
}
// Make the LRU cache contain which take approximately 3/4 of the maximum space.
// Assume small and big objects are stored in 50-50 proportion.
c.maxFlushedMarksCount = int(c.maxCacheSize/c.maxObjectSize+c.maxCacheSize/c.smallObjectSize) / 2 * 3 / 4
// Trigger the removal when the cache is 7/8 full, so that new items can still arrive.
c.maxRemoveBatchSize = c.maxFlushedMarksCount / 8
return c
}