[MDEV-8268] InnoDB: Assertion failure in file buf0buf.cc line 5842 failing assertion ut_a(free_slot != NULL); Created: 2015-06-04  Updated: 2015-06-09  Resolved: 2015-06-09

Status: Closed
Project: MariaDB Server
Component/s: Encryption, Storage Engine - InnoDB, Storage Engine - XtraDB
Affects Version/s: 10.1.4
Fix Version/s: 10.1.6

Type: Bug Priority: Major
Reporter: Jan Lindström (Inactive) Assignee: Jan Lindström (Inactive)
Resolution: Fixed Votes: 0
Labels: None


 Description   

Found using:

  • innodb_read_io_threads=24
  • innodb_write_io_threads=24
  • innodb_buffer_pool_instances=32
  • innodb_encrypt_tables=1

Problem is that there can be more than pre-allocated number of used slots on encryption/compression because of open I/O requests.

 Comments   
Comment by Jan Lindström (Inactive) [ 2015-06-09 ]

commit 4a6a61cb8190ad5b8fc3993b15e0fa48bcb730a5
Author: Jan Lindström <jan.lindstrom@mariadb.com>
Date: Mon Jun 8 08:09:33 2015 +0300

MDEV-8268: InnoDB: Assertion failure in file buf0buf.cc line 5842 failing assertion ut_a(free_slot != NULL);

Analysis: Problem is that there is not enough temporary buffer slots
for pending IO requests.

Fixed by allocating same amount of temporary buffer slots as there
are max pending IO requests.

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