understand pm.max_children tuning
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0
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I have done some investigations and I have found this to calculate and adjust pm.max_children value
https://myshell.co.uk/blog/2012/07/adjusting-child-processes-for-php-fpm-nginx/
but for example :
- I have 8Gb on my server
- I'm hosting 30 websites
- php-fpm average process size around 40mb
- php-fpm max process size around 80mb
- I want to allocate 5Gb max of my memory to php-fpm processes
If I apply this :
pm.max_children = Total RAM dedicated to the web server / Max child process size
So in my case :
pm.max_children = 5120 / 80 = 64
But If I add pm.max_children = 64 on each php-fpm website conf files, this means every website can use 64 children process X size of 1 process (ex 40mb) = 2560Mb
And If we imagine, at the same time, all the 30 website have reach the pm.max_children value, we will have : 2560Mb (max per website) x 30 websites = 76 800 Mb
Am I correct?
Si yes, this means when many websites are hosted on the same server, we have to divide the result of the calcul pm.max_children = 5120 / 80 = 64 by the number of websites hosted (here 30).
So 64 / 30 = 2,1 and pm.max_children = 2 per website
Is it correct or not?
Thanks
php web memory php-7.2 fpm
asked Nov 9 at 14:13
TooNetCreation
125
|
show 4 more comments
up vote
0
down vote
favorite
I have done some investigations and I have found this to calculate and adjust pm.max_children value
https://myshell.co.uk/blog/2012/07/adjusting-child-processes-for-php-fpm-nginx/
but for example :
- I have 8Gb on my server
- I'm hosting 30 websites
- php-fpm average process size around 40mb
- php-fpm max process size around 80mb
- I want to allocate 5Gb max of my memory to php-fpm processes
If I apply this :
pm.max_children = Total RAM dedicated to the web server / Max child process size
So in my case :
pm.max_children = 5120 / 80 = 64
But If I add pm.max_children = 64 on each php-fpm website conf files, this means every website can use 64 children process X size of 1 process (ex 40mb) = 2560Mb
And If we imagine, at the same time, all the 30 website have reach the pm.max_children value, we will have : 2560Mb (max per website) x 30 websites = 76 800 Mb
Am I correct?
Si yes, this means when many websites are hosted on the same server, we have to divide the result of the calcul pm.max_children = 5120 / 80 = 64 by the number of websites hosted (here 30).
So 64 / 30 = 2,1 and pm.max_children = 2 per website
Is it correct or not?
Thanks
php web memory php-7.2 fpm
asked Nov 9 at 14:13
TooNetCreation
125
Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42
|
show 4 more comments
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have done some investigations and I have found this to calculate and adjust pm.max_children value
https://myshell.co.uk/blog/2012/07/adjusting-child-processes-for-php-fpm-nginx/
but for example :
- I have 8Gb on my server
- I'm hosting 30 websites
- php-fpm average process size around 40mb
- php-fpm max process size around 80mb
- I want to allocate 5Gb max of my memory to php-fpm processes
If I apply this :
pm.max_children = Total RAM dedicated to the web server / Max child process size
So in my case :
pm.max_children = 5120 / 80 = 64
But If I add pm.max_children = 64 on each php-fpm website conf files, this means every website can use 64 children process X size of 1 process (ex 40mb) = 2560Mb
And If we imagine, at the same time, all the 30 website have reach the pm.max_children value, we will have : 2560Mb (max per website) x 30 websites = 76 800 Mb
Am I correct?
Si yes, this means when many websites are hosted on the same server, we have to divide the result of the calcul pm.max_children = 5120 / 80 = 64 by the number of websites hosted (here 30).
So 64 / 30 = 2,1 and pm.max_children = 2 per website
Is it correct or not?
Thanks
php web memory php-7.2 fpm
asked Nov 9 at 14:13
TooNetCreation
125
I have done some investigations and I have found this to calculate and adjust pm.max_children value
https://myshell.co.uk/blog/2012/07/adjusting-child-processes-for-php-fpm-nginx/
but for example :
- I have 8Gb on my server
- I'm hosting 30 websites
- php-fpm average process size around 40mb
- php-fpm max process size around 80mb
- I want to allocate 5Gb max of my memory to php-fpm processes
If I apply this :
pm.max_children = Total RAM dedicated to the web server / Max child process size
So in my case :
pm.max_children = 5120 / 80 = 64
But If I add pm.max_children = 64 on each php-fpm website conf files, this means every website can use 64 children process X size of 1 process (ex 40mb) = 2560Mb
And If we imagine, at the same time, all the 30 website have reach the pm.max_children value, we will have : 2560Mb (max per website) x 30 websites = 76 800 Mb
Am I correct?
Si yes, this means when many websites are hosted on the same server, we have to divide the result of the calcul pm.max_children = 5120 / 80 = 64 by the number of websites hosted (here 30).
So 64 / 30 = 2,1 and pm.max_children = 2 per website
Is it correct or not?
Thanks
php web memory php-7.2 fpm
php web memory php-7.2 fpm
asked Nov 9 at 14:13
TooNetCreation
125
asked Nov 9 at 14:13
TooNetCreation
125
edited Nov 9 at 20:16
asked Nov 9 at 14:13
TooNetCreation
125
asked Nov 9 at 14:13
TooNetCreation
125
asked Nov 9 at 14:13
TooNetCreation
125
125
Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42
|
show 4 more comments
Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42
Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42
|
show 4 more comments
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Optimize for the average case, and not maxima or peaks until they arise.
– mario
Nov 9 at 14:38
Ok but even If i optimise for the average case am I wrong or not with the calculation method? I mean regarding my last post, pm.max_children should be 64 or 2 ?
– TooNetCreation
Nov 9 at 14:57
so good calculation is pm.max_children = 5120 / 80 = 64 so pm.max_children =64 for each website or pm.max_children = 5120 / 80 = 64 and 64 / 30 (number of websites) = 2 so pm.max_children =2 for each website ?
– TooNetCreation
Nov 9 at 14:58
I have opened a specific ticket with all infos and replies : serverfault.com/questions/939436/…
– TooNetCreation
Nov 10 at 9:16
nobody has infos or can confirm?
– TooNetCreation
Nov 11 at 9:42