topic system performance in Operating System - HP-UX

system performance

Javier Ortiz Guajardo — Thu, 01 May 2003 22:29:06 GMT

At this moment we don??t have a product to monitor the system (like glance ...etc)
how can i evaluate my system with out this kind of tools, about memory and swap.

I need to knwo if my system is swaping and how much resources (Virtual memory, memory swap and real memory) is being used. Is there some commands that can help me to evaluate my system?

Can sar, vmstat, swapinfo. help me to evaluate my system?

i have a program - memdetail - but i??m having trouble to understand the results about this program.

i appreciate your help...
Thanks.

Re: system performance

Michael Tully — Thu, 01 May 2003 22:41:10 GMT

The combination of all of those tools should give you a reasonable evaluation on system performance. In saying that, why not load the glance tool(s) using the trial copy. It has a 60 day license.

Besides sar, vmstat, and swapinfo there is also iostat and timex that can assist as well.

CPU 'sar-u 5 5'
disk 'sar -d 5 5'
sar -b (block activity)
sar -q (run queue & run occupancy %)
vmstat -n 5 2
vmstat -f
vmstat -s

You can also use accounting (sar,acct) to gather information for later analysis.

Re: system performance

malay boy — Fri, 02 May 2003 00:15:19 GMT

well you can check this thread.It have a bunch of good script by our guru's in this forum.

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x836cc1c4ceddd61190050090279cd0f9,00.html

Re: system performance

Michael Steele_2 — Fri, 02 May 2003 00:29:05 GMT

Refer to Mr. Tulley's posting for that's all you need. In fact, its the exact same procedure that the response center follows. Refer to document:

KBRC00004630.

sar -u 5 5
(* %idle low or 0? => cpu bottleneck *)

(* %wio > 15% => disk or tape bottleneck. Use this during backups. *)

sar -d 5 5
(* %busy > 50% => disk bottleneck, cross reference with 'avwait > avserv'. Together, they indicate an I/O bottleneck *)

vmstat 5 5
(* po nonzero? page out *)

sar -v 5 5
(* result of numerator / denominator > 85-90%, then your either, nproc, ninode or nfile needs to be increased. *)

swapinfo -tam
(* total %utilizied > 85% => add more swap *)

Re: system performance

KO kwang tae — Fri, 02 May 2003 02:04:11 GMT

i think you can use enough to evaluate your system

as follows :

sar -u 2 5 ( cpu bottlenect check)
UNIX95= ps -e -o "user,vsz,pcpu,pid,ppid,args" |sort -rnk2 |more
(memory/ cpu percentage check)
swapinfo -atm (swap check)
top (memory use rate check)
real, vitual, free
you have to check to use pseudo-swap.(swapmem_on)

iostat 2 5( disk check)

Re: system performance

V. V. Ravi Kumar_1 — Fri, 02 May 2003 02:55:33 GMT

Hi,

See the website www.sarchek.com, u can get a trial version for HP-UX.

Regards