Re: Re: Clearing memory

[eXile]

From the OP I don't understand if the difference between CPU usage and memory usage is clear to the poster. If this difference is clear I apologize for telling something you already know.

CPU usage and memory usage are seperate entities. This code:

perl -e 'for(;;) { }'

Will use close to 100% CPU-usage while using little memory (for a perl-process at least), this is because the processor is constantly wants a slice of processor time, to execute something close to nothing. In the 'top'-output the memory use is in the SIZE and RES columns:

  PID USERNAME PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMA
+ND
38691 eXile     64   0  2160K  1444K RUN      1:30 92.84% 92.04% perl5
+.8.2

While this code:

perl -e 'for(;;) { sleep 100 }'

will almost use no CPU-cycles, and almost the same amount of memory. Because this process will only ask for processor time every 100 seconds:

  PID USERNAME PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMA
+ND
...
38692 eXile     10   0  2160K  1480K nanslp   0:00  0.00%  0.00% perl5
+.8.2

I think in Win32 the process-manager (or the 'top' provided by cygwin) should be able to display this type of information as well. No experience on other OSses.