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litespeed_wiki:php:concurrency [2019/03/29 17:47]
Jackson Zhang [PHP suEXEC Max Conn was changed but why not effective?]
litespeed_wiki:php:concurrency [2019/03/29 19:27] (current)
Lisa Clarke Proofreading
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 This wiki will go over the ways to control concurrency with different PHP LSAPI setups. This wiki will go over the ways to control concurrency with different PHP LSAPI setups.
-====== PHP suEXEC Max Connections ​======+===== PHP suEXEC Max Connections =====
  
 LSWS offers three different PHP suEXEC modes: [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-worker|Worker]],​ [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-daemon-mode|Daemon]],​ and [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-processgroup|ProcessGroup]]. LSWS offers three different PHP suEXEC modes: [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-worker|Worker]],​ [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-daemon-mode|Daemon]],​ and [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​suexec-processgroup|ProcessGroup]].
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     LSPHP_Workers 100     LSPHP_Workers 100
   </​IfModule>​   </​IfModule>​
-====== PHP Non-suEXEC Max Connections ​======+===== PHP Non-suEXEC Max Connections =====
  
 LSWS offers two non-suEXEC PHP modes: Worker and ProcessGroup. LSWS offers two non-suEXEC PHP modes: Worker and ProcessGroup.
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   - ProcessGroup:​ In ProcessGroup,​ the Instances setting must be set to 1. Control the number of processes instead with the [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​configuration|PHP_LSAPI_CHILDREN environment variable]].   - ProcessGroup:​ In ProcessGroup,​ the Instances setting must be set to 1. Control the number of processes instead with the [[https://​www.litespeedtech.com/​docs/​litespeed-sapi/​php-lsapi/​configuration|PHP_LSAPI_CHILDREN environment variable]].
  
-=====Which setup am I using? ======+===== Determining ​Which PHP Setup is in Use =====
  
 Some users may be confused about which setup they are using. Follow the steps in the [[litespeed_wiki:​php:​which_php_setup_am_I_using|Which PHP setup am I using? wiki]] to figure it out. Some users may be confused about which setup they are using. Follow the steps in the [[litespeed_wiki:​php:​which_php_setup_am_I_using|Which PHP setup am I using? wiki]] to figure it out.
  
  
-====== Reached ​max children process limit? ​======+===== Reached ​Max Children Process Limit ======
  
 You might have already fine-tuned the environment variables such as LSAPI_CHILDREN to 50 but still experienced error message like “Reached max children process limit: 15, extra: 5, current: 20, please increase LSAPI_CHILDREN”. <​env>​LSAPI_CHILDREN=50</​env>​ has been double-checked in lsphp5 external app and seems no problem. Why doesn'​t match? What happened? How to fix it? You might have already fine-tuned the environment variables such as LSAPI_CHILDREN to 50 but still experienced error message like “Reached max children process limit: 15, extra: 5, current: 20, please increase LSAPI_CHILDREN”. <​env>​LSAPI_CHILDREN=50</​env>​ has been double-checked in lsphp5 external app and seems no problem. Why doesn'​t match? What happened? How to fix it?
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 On the other hand, you should verify if it is normal to have so many PHP processes. You may try to enable cache to avoid such high PHP processes. On the other hand, you should verify if it is normal to have so many PHP processes. You may try to enable cache to avoid such high PHP processes.
  
-=====PHP suEXEC Max Conn was changed but why not effective? ======+===== New PHP suEXEC Max Conn Being Ignored ​=====
  
-After you change ​"PHP suEXEC Max Conn", for example, from ''​10''​ to ''​20'',​ error messages sometime ​shows as mixed old value ''​10''​ and new setting ''​20''​.Why?​+After you change ​**PHP suEXEC Max Conn**, for example, from ''​10''​ to ''​20'',​ error messages sometime ​show as mixed old value ''​10''​ and new setting ''​20''​. Why?
   (14715) Reached max children process limit: 10, extra: 3, current: 13, busy: 12, please increase LSAPI_CHILDREN.   (14715) Reached max children process limit: 10, extra: 3, current: 13, busy: 12, please increase LSAPI_CHILDREN.
   (28253) Reached max children process limit: 20, extra: 6, current: 26, busy: 26, please increase LSAPI_CHILDREN.   (28253) Reached max children process limit: 20, extra: 6, current: 26, busy: 26, please increase LSAPI_CHILDREN.
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   (28253) Reached max children process limit: 20, extra: 6, current: 26, busy: 26, please increase LSAPI_CHILDREN.   (28253) Reached max children process limit: 20, extra: 6, current: 26, busy: 26, please increase LSAPI_CHILDREN.
  
-   +To make the change effective immediately,​ you will need to restart LiteSpeed ​Web Server. If LSWS 5.3is used, you will also need to restart detached PHPs 
-To make the change effective immediately,​ you will need to restart LiteSpeed ​web server and restart detached PHPs if LSWS 5.3.x is used.+
   service lsws restart   service lsws restart
   killall lsphp   killall lsphp
   ​   ​
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  • Last modified: 2019/03/29 19:27
  • by Lisa Clarke