IO per process usage - Aix
This is a discussion on IO per process usage - Aix ; Anyone can help me how can I view IO per process usage in AIX 5.3 ?
IO per process usage
Anyone can help me how can I view IO per process usage in AIX 5.3 ?
Re: IO per process usage
> Anyone can help me how can I view IO per process usage in AIX 5.3 ?
Two basic approaches.
Use the getprocs64() API and fish the stats you want out of the
Use the SPMI API . There are sample programs ... can't remember
exactly where they're installed. Do a find for "chmon.c" and
You understand that the concept of "I/O per process" is sort of, uh,
ill-defined in a 2nd level store Operating System, like AIX is,
It's 1 AM, so I'm not going to go into detail ... but consider a
group of 2 or more cooperating processes using mmap to demand page
disk pages into a segment of shared memory.
3 of these processes have an outstanding request for (some of) the
same disk pages, so the VMM dispatches physical I/O to satisfy the
How do you decide which process(es) get charged with the I/O ?
I think the phrase "that answer's not even wrong" was created for
questions like this :-)
#include /* I don't speak for IBM ... */
/* Heck, I don't even speak for myself */
/* Don't believe me ? Ask my wife :-) */
Richard D. Latham firstname.lastname@example.org