How much memory limit to magento's process?

[Kefei Sima]

I found magento eat a lot of memory.
Currently,each php process for magento would eat about 700M.Is it normal?
the list is top command from my server:
22935 apache 20 0 796m 167m 123m S 11.6 0.5 38:10.43 php-fpm
22934 apache 20 0 795m 167m 122m S 2.7 0.5 38:16.69 php-fpm
22933 apache 20 0 793m 166m 124m S 12.3 0.5 38:10.56 php-fpm
22952 apache 20 0 791m 165m 124m S 9.0 0.5 38:29.56 php-fpm
22925 apache 20 0 794m 165m 121m S 11.0 0.5 37:51.22 php-fpm
22950 apache 20 0 793m 164m 121m S 8.6 0.5 38:36.87 php-fpm
22926 apache 20 0 793m 164m 121m S 0.0 0.5 38:13.07 php-fpm
22954 apache 20 0 793m 163m 121m R 8.6 0.5 38:07.99 php-fpm
22948 apache 20 0 793m 162m 120m S 4.0 0.5 38:44.92 php-fpm
22938 apache 20 0 793m 161m 119m S 0.0 0.5 38:08.42 php-fpm
22924 apache 20 0 793m 161m 119m S 0.0 0.5 38:02.26 php-fpm
22932 apache 20 0 793m 160m 118m S 8.0 0.5 38:04.76 php-fpm
22955 apache 20 0 787m 159m 123m S 3.0 0.5 38:18.50 php-fpm
22947 apache 20 0 788m 159m 121m R 6.6 0.5 38:08.55 php-fpm
22953 apache 20 0 788m 157m 119m S 5.0 0.5 37:53.66 php-fpm
22918 apache 20 0 786m 155m 119m S 7.0 0.5 38:13.83 php-fpm

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[rocker]

It is not normal at all. But the memory eat belong to many factor, not only magento process. How 's your server configuration?

[Kefei Sima]

Thanks rocker.
I set
apc.shm_size=396M
apc.num_files_hint=10000
apc.user_entries_hint=10000
apc.max_file_size=5M


and under website's root .htaccess
php_value memory_limit 256M
php_value max_execution_time 18000

Is apc shm_size too large?I just use apc cache ,session use file cache.
I am not sure what other settings' value should provid.
And there are about 20k simple products.While before,it also need about 500-600M.

[shunavi]

I think you should try to install one of full page caching extension, it will save a lot of resource. And then use one of CDN like cloudflare to see the changes of performance.

Thanks rocker.
I set
apc.shm_size=396M
apc.num_files_hint=10000
apc.user_entries_hint=10000
apc.max_file_size=5M


and under website's root .htaccess
php_value memory_limit 256M
php_value max_execution_time 18000

Is apc shm_size too large?I just use apc cache ,session use file cache.
I am not sure what other settings' value should provid.
And there are about 20k simple products.While before,it also need about 500-600M.

[rocker]

It is not enough to know the server configuration. How 's the CPU, RAM and do you install any full page caching extension?

[Kefei Sima]

Thanks shunavi and rocker.
I did not use full page cache.I tried full page cache such as zoom full page cache and some other extension,however some have conflicts with existing extension and some looks no fuction for the speed in the development server.So I did not use them to save the memory.I think the cdn would increase the performance just as shunavi suggest,but it would not lower the momeory for each php process(when there ar more and more connections at the same time,then the memory would be over shortly).I just wonder whether it is caused by the large framework of magento.
This is the one snapshot for top:
Tasks: 211 total, 4 running, 207 sleeping, 0 stopped, 0 zombie
Cpu(s): 53.8%us, 1.4%sy, 0.0%ni, 43.5%id, 1.3%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 32910264k total, 32469020k used, 441244k free, 2685376k buffers
Swap: 20477936k total, 150936k used, 20327000k free, 21267312k cached

The memory is 32G and the cpu is :
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 58
model name : Intel(R) Xeon(R) CPU E3-1245 V2 @ 3.40GHz
stepping : 9
cpu MHz : 3392.209
cache size : 8192 KB