How are you measuring this?
top, or ps aux and watch the RSS column (the real memory (resident set)
size of the process (in 1024 byte units)).
A sample top output:
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND
87075 www 4 0 178M 174M accept 0:32 3.08% 3.08% httpd
86839 www 4 0 175M 171M accept 1:53 0.39% 0.39% httpd
86827 www 4 0 188M 184M accept 2:12 0.00% 0.00% httpd
86836 www 4 0 187M 183M accept 2:06 0.00% 0.00% httpd
86830 www 4 0 172M 168M accept 2:02 0.00% 0.00% httpd
86831 www 4 0 177M 173M accept 2:02 0.00% 0.00% httpd
86858 www 4 0 189M 185M accept 1:58 0.00% 0.00% httpd
87070 www 4 0 170M 167M accept 0:49 0.00% 0.00% httpd
87073 www 4 0 187M 184M accept 0:38 0.00% 0.00% httpd
87074 www 4 0 174M 170M accept 0:29 0.00% 0.00% httpd
69201 root 96 0 157M 154M select 0:13 0.00% 0.00% httpd
The initial size of the httpd root process was 46 MB.
That's correct. Are you using Cache::FastMmap, or anything else that
does memory-mapping of files? That might yield an apparent larger size
if the parent process is one of the ones that has the mmap'ed file open.
No, I'm not using Cache::FastMmap.
