Aliaksandr Valialkin 46bd2c4d6d lib/blockcache: increase the lifetime for rarely accessed blocks from 2 minutes to 5 minutes ... This should improve data ingestion speed if time series samples are ingested with interval bigger than 2 minutes. The actual interval could exceed 2 minutes if the original interval between samples doesn't exceed 2 minutes in the case of slow inserts. Slow inserts may appear in the following cases: * Big number of new time series are pushed to VictoriaMetrics, so they couldn't be registered in 2 minutes. * MetricName->tsid cache reset on indexdb rotation or due to unclean shutdown. In this case VictoriaMetrics needs to load MetricName->tsid entries for all the incoming series from IndexDB. IndexDB uses the block cache for increasing lookup performance. If the cache has no the needed block, then IndexDB reads and unpacks the block from disk. This requires an extra disk read IO and CPU. See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1401 Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007 This also should increase performance for periodically executed queries with intervals from 2 minutes to 5 minutes. See the previous similar commit - 43103be011 It is possible that the timeout can be increased further. Let's collect production numbers for this change so the timeout could be adjusted further.		2022-02-08 00:15:56 +02:00
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blockcache.go	lib/blockcache: increase the lifetime for rarely accessed blocks from 2 minutes to 5 minutes	2022-02-08 00:15:56 +02:00