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Server crashed a few times due to lack of memory - how can I find out how much is available to each process?

rated 0 times [ 0] [ 0] / answers: 1 / hits: 2237 / 3 Years ago, wed, july 28, 2021, 10:13:49

We had a huge spike in traffic with lots of these errors:

Feb 17 10:44:13 111488 kernel: [8275767.506198] Out of memory: Kill process 20577 (apache2) score 52 or sacrifice child

Feb 17 11:02:06 111488 kernel: [8276839.559141] Out of memory: Kill process 20719 (mysqld) score 75 or sacrifice child

As you can see, it's not just one process but both apache2 and mysqld, so I've increased the RAM on the server. How can I check that this is available to these processes?

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enefiama

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answered 3 Years ago rieency · Accepted Answer

You are looking for the [top] command

top - 15:20:30 up  6:57,  5 users,  load average: 0.64, 0.44, 0.33

Tasks: 265 total,   1 running, 263 sleeping,   0 stopped,   1 zombie

%Cpu(s):  7.8 us,  2.4 sy,  0.0 ni, 88.9 id,  0.9 wa,  0.0 hi,  0.0 si,  0.0 st

KiB Mem:   8167848 total,  6642360 used,  1525488 free,  1026876 buffers

KiB Swap:  1998844 total,        0 used,  1998844 free,  2138148 cached



  PID USER      PR  NI  VIRT  RES  SHR S  %CPU %MEM    TIME+  COMMAND                                                                                 

 2986 enlighte  20   0  584m  42m  26m S  14.3  0.5   0:44.27 yakuake                                                                                 

 1305 root      20   0  448m  68m  39m S   5.0  0.9   3:33.98 Xorg                                                                                    

 7701 enlighte  20   0  424m  17m  10m S   4.0  0.2   0:00.12 kio_thumbnail

or [htop] command,

htop result

Source: BinaryTides