Hello Benjamin:
I am using Imagemagick.
LocalSettings.php: --- $wgUseImageMagick = true; $wgImageMagickConvertCommand = "/usr/bin/convert"; ---
I have noticed that the free memory drifts downward with time.
Here is 'top' at different time points today: --- top - 03:12:26 up 6 min, 1 user, load average: 0.15, 0.15, 0.07 Tasks: 70 total, 1 running, 69 sleeping, 0 stopped, 0 zombie %Cpu(s): 2.0 us, 0.0 sy, 0.0 ni, 94.6 id, 3.3 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 2012148 total, 532216 used, 1479932 free, 10876 buffers KiB Swap: 1113084 total, 0 used, 1113084 free, 394924 cached
top - 03:42:45 up 36 min, 1 user, load average: 0.01, 0.02, 0.05 Tasks: 74 total, 1 running, 73 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.3 us, 0.0 sy, 0.0 ni, 99.7 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 2012148 total, 935504 used, 1076644 free, 50680 buffers KiB Swap: 1113084 total, 0 used, 1113084 free, 630280 cached
top - 22:23:06 up 19:16, 1 user, load average: 0.00, 0.01, 0.05 Tasks: 74 total, 1 running, 73 sleeping, 0 stopped, 0 zombie %Cpu(s): 1.8 us, 0.2 sy, 0.1 ni, 96.9 id, 0.7 wa, 0.0 hi, 0.1 si, 0.2 st KiB Mem: 2012148 total, 1923744 used, 88404 free, 168692 buffers KiB Swap: 1113084 total, 0 used, 1113084 free, 1227952 cached ---
The first problem was around August 20: I had zombie processes alert and needed a server reset. That was a first. I assumed it was isolated and things were okay until approximately August 28.
I have automatic security updates from debian. My 'apt' log shows upgrading of php & apache on August 21 and 22. I don't see any other significant updates.
This problem is quite frustrating. I am happy to hear any suggestions.
Thanks, Michael