Cannot allocate memory: fork: Unable to fork new process

[kwatog]

Lately, I have been hitting the error "Cannot allocate memory: fork: Unable to fork new process" eventhough it appears that I'm only using 120MB out of 640MB of guaranteed RAM. I created a support ticket and they said they can't find any problem because I still have ample amount of memory left. So what could be causing this error? On a daily basis, I get at least a 100 instances of this error. That's at least 100 pageviews gone.

apache prefork

<IfModule prefork.c>
StartServers      4
MinSpareServers   4
MaxSpareServers  8
ServerLimit     400
MaxClients      400
MaxRequestsPerChild  4000
</IfModule>

php.ini resource limit

max_execution_time = 40     ; Maximum execution time of each script, in seconds
max_input_time = 80     ; Maximum amount of time each script may spend parsing request data
memory_limit = 64M      ; Maximum amount of memory a script may consume

[JPC-Bilal]

Hi kwatog,

Please provide me the Ticket number so that I can check and assist you regarding this issue. Thank you.

[kwatog]

Hi kwatog,

Please provide me the Ticket number so that I can check and assist you regarding this issue. Thank you.

Thanks, Bilal! I already closed my original ticket (the recommendation was to restart the vps, which I did, to plug memory leaks. My server uptime by that time was already 500 days. But anyway, I raised a new support ticket -- 13408884.

By the way, I ran userbeans.sh and the output as below.

[root@vps ~]# sh userbeans.sh +lufkm
1024 MB Allocation Limit [privvmpages limit]
1024 MB Allocation Barrier [privvmpages barrier]
 640 MB Allocation Guarantee [vmguarpages barrier]
 256 MB Memory Guarantee [oomguarpages barrier]
 718 MB ( 750 MB Max) page memory allocated [privvmpages held]
  87 MB ( 108 MB Max) memory + swap used [oomguarpages held]
  87 MB ( 108 MB Max) page memory used [physpages held]
  62 MB ( 64000 KB) kernel memory limit [kmemsize limit]
  62 MB ( 64000 KB) kernel memory barrier [kmemsize barrier]
   6 MB (  6213 KB) kernel memory used [kmemsize held]
   0 MB (   539 KB) buffer memory used [*buf held]
Fail Count conditions: 2
privvmpages 184056 192249 262144 262144 124554
numfile 2256 2412 10000 10000 52654

[JPC-Bilal]

I'll check the ticket and will update you. Please follow up in the Ticket. Thank you.