Transaction status: "not started sleeping before entering InnoDB"
(Doc ID 2412577.1)
Last updated on JUNE 24, 2018
Applies to:
MySQL Server - Version 5.6 to 5.7 [Release 5.6 to 5.7]Information in this document applies to any platform.
Symptoms
If check the innodb engine status we can see many transactions are in status :
"--TRANSACTION xxxxxxxx, not started sleeping before entering InnoDB"
or
"---TRANSACTION xxxxxxxx, not started committing, thread declared inside InnoDB"
And Innodb queue is busy:
"
--------------
ROW OPERATIONS
--------------
16 queries inside InnoDB, 9447 queries in queue
15 read views open inside InnoDB
"
Changes
Set innodb_thread_concurrency to 16 in this case.
Cause
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