MySQL Error Log Contains "InnoDB: Warning: A Long Semaphore Wait" and "Starts InnoDB Monitor for 30 secs to print diagnostic info" (Doc ID 1452692.1)

Last updated on MARCH 16, 2017

Applies to:

MySQL Server - Version 4.0 and later
Information in this document applies to any platform.

Symptoms

 MySQL error log contains "InnoDB: Warning: A Long Semaphore Wait" and "Starts InnoDB Monitor for 30 secs to print diagnostic info" followed by InnoDB monitor/status output.

Cause

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