Long Semaphore Wait For Mutex Created in File buf0buf.cc and Locked in File buf0flu.cc With Pending Flushes (fsync) (Doc ID 1986109.1)

Last updated on MARCH 08, 2017

Applies to:

MySQL Server - Version 5.6 and later
Information in this document applies to any platform.

Symptoms

When attempting to use execute data modifying queries, the following or a similar error occurs:

There is no change to the pending flushes over time while the semaphore wait is in place.

Cause

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