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