MPM is "prefork", mod_qos wants "worker", what to do?

postcd

• April 25, 2015 11:30

Hello, in Apache error log i found: [notice] mod_qos(009): loaded MPM is 'Prefork' but mod_qos should be used with MPM 'Worker' only. In EasyApache i have installed Mod Ruid2 0.9.8 and in easyapache i see this module "Disables MPM Worker". MPM Prefork (recommended) is unticked in EasyApache, but my EasyApache profile is: Apache 2.2 PHP 5.3 MPM Prefork <----- Mod Ruid2 Server Version: Apache/2.2.29 (Unix) ... mod_qos/11.5 so can i safelly ignore that qos warning or stop using

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  24x7server

  • April 26, 2015 05:06

  Hello, I think you will need to rebuild easy-apache on your server with the MPM Worker as mod_qos requires MPM Worker, So try to rebuild it again.

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  cPanelMichael

  • April 27, 2015 18:41

  Hello, You will need to choose between using Mod_QOS and using Mod_Ruid2. The mpm_worker_module Apache MPM and the mpm_event_module Apache MPM are thread-based MPMs. MPMs that use threads do not work with the mod_ruid2 Apache module, because they alter the UID and GID at the process level. Thank you.

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  postcd

  • April 27, 2015 20:44

  thx, my mod_ruid did not worked, so i think i will have to use QOS and use EasyApache to enable MPM Worker even MPM Prefork is marked as "recommended" in EasyApache right..

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  cPanelMichael

  • April 28, 2015 13:34

  Yes, the mpm_worker_module Apache module is required if you plan to use mod_qos. Thank you.

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  postcd

  • April 28, 2015 14:26

  thx, pls anyone knows why is prefork "recommended" (in easyapache) over "worker" so i know it is a good step to switch this?

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  cPanelMichael

  • April 29, 2015 12:57

  Hello, Prefork is recommended over the other MPM options due to it's stability. This is documented at:

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  postcd

  • April 29, 2015 17:03

  thx, one more thing, in EasyApache, Exhaustive Options List, i did not found Worker MPM, only: MPM ITK MPM Prefork

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  cPanelMichael

  • April 30, 2015 14:00

  thx, one more thing, in EasyApache, Exhaustive Options List, i did not found Worker MPM, only: MPM ITK MPM Prefork

  
  Do you have Mod_Ruid2 installed? Note that it's not compatible with MPM Worker. Thank you.

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  postcd

  • April 30, 2015 15:59

  Yes, when unticked Ruid2 in EasyApache, i think i was able to select MPM Worker. thanks At the end i switched back to Prefork as mod_qos still dont shown details per domain/user account on Apache Status page in WHM and on that Apache status page, there was too many dots (as available apache connection) sorry for my english My issue is now solved. Thanks

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  cPanelMichael

  • April 30, 2015 16:37

  I am happy to see the issue is now resolved. Thank you for updating us with the outcome.

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