Answers.Body: <p>Consider installing CiviCRM 5.13.1 and enabling multiple MySQL locks. See <a href="https://github.com/civicrm/civicrm-core/pull/13854" rel="nofollow noreferrer">https://github.com/civicrm/civicrm-core/pull/13854</a> for details.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-04T20:10:11.747Z
Answers.Text: Thanks, I will update and analyze system behaviour after upgrade
Answers.UserDisplayName: Ajay Thakur
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-05-03T18:34:29.207Z
Answers.LastActivityDate: 2019-05-03T18:34:29.207Z
Answers.UserDisplayName: Jon G - Megaphone Tech
Body: <p>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.</p>
  
  <p>Need help from team</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-03T18:10:19.340Z
Comments.Text: Do you have logging turned on at admin - system settings - misc? Try turning it off?
Comments.UserDisplayName: Demerit
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-05-04T20:09:10.497Z
Comments.Text: logging was off, but still it goes down.
Comments.UserDisplayName: Ajay Thakur
Tags: <civicrm.settings.php><deadlocks>
Title: CiviMail Deadlock Issue
ThreadText: # CiviMail Deadlock Issue
  
  (Asked by: username_0 on 2019-05-03)
  
  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
  
  **Tags:** civicrm.settings.php, deadlocks
  
  > **Comments:**
  > **username_1**: Do you have logging turned on at admin - system settings - misc? Try turning it off?  
  > **username_0**: logging was off, but still it goes down.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2019-05-03. Score: 1
  
  Consider installing CiviCRM 5.13.1 and enabling multiple MySQL locks. See <https://github.com/civicrm/civicrm-core/pull/13854> for details.
  
  > **Comments:**
  > **username_0**: Thanks, I will update and analyze system behaviour after upgrade  
  
  ---
  
  