I am facing deadlock on civicrm_acl_cache. I am sending email to 400,000 users. Many times, deadlock occur and due to system lock website goes down.

Need help from team

  • Do you have logging turned on at admin - system settings - misc? Try turning it off? – Demerit May 3 '19 at 18:10
  • logging was off, but still it goes down. – Ajay Thakur May 4 '19 at 20:09

Consider installing CiviCRM 5.13.1 and enabling multiple MySQL locks. See https://github.com/civicrm/civicrm-core/pull/13854 for details.

  • Thanks, I will update and analyze system behaviour after upgrade – Ajay Thakur May 4 '19 at 20:10

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