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Type:
Bug
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Status: Done
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Priority:
Medium
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Resolution: Fixed
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Affects Version/s: 5.7, Not 5.5, Not 5.6
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Fix Version/s: 5.7.21-21
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Component/s: None
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Labels:
PS-3360 was developed when LRU flusher was performed by the page cleaners, before its flushing was split to separate threads. Now its logic is outdated and the comment invalid:
diff --git a/storage/innobase/buf/buf0flu.cc b/storage/innobase/buf/buf0flu.cc index c7672a6137e..443740ac200 100644 --- a/storage/innobase/buf/buf0flu.cc +++ b/storage/innobase/buf/buf0flu.cc @@ -3385,7 +3385,13 @@ DECLARE_THREAD(buf_flush_page_cleaner_coordinator)( n_flushed = n_processed_lru; - if (ut_time_ms() > next_loop_time) + if (ut_time_ms() > next_loop_time + && ret_sleep != OS_SYNC_TIME_EXCEEDED) + + /* If our LRU flush took too long, skip the rest only + if the last iteration completed in time, otherwise we'd + be LRU flushing all the time, even if e.g. a sync flush + is waiting. */ ret_sleep = OS_SYNC_TIME_EXCEEDED; else if (ret_sleep != OS_SYNC_TIME_EXCEEDED && srv_flush_sync
Analyze and revert.
- has to be done before
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PS-269 Initial Percona Server port to MySQL 8
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- Done
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