topic Re: Wait Reason: STRMS in Operating System - HP-UX

Wait Reason: STRMS

PAUL CHEN_2 — Sat, 20 Oct 2001 12:18:35 GMT

How to tune when you see "wait reason:STRMS" in gpm (glanceplus)?

Re: Wait Reason: STRMS

Sridhar Bhaskarla — Sat, 20 Oct 2001 16:22:34 GMT

Paul,

It tells that the process is waiting for it's stream IO to complete. I am not if you can be able to finetune to get rid of the problem. Most of the times the problems end up with bad application code. In glance, try "B" (shift-b) and check the Global Wait States. You can also see what each metric means through help on current screen metrics.

Even before blaming the application, it's better to check all the resources like Disk I/O, kernel parameters, CPU, Paging etc.,

-Sri

Re: Wait Reason: STRMS

Printaporn_1 — Mon, 22 Oct 2001 03:02:04 GMT

yes, I used to get this problem before , cause of problem is application side,
type of application is like , you can run it in parallel and it wait for synchronization (in my case it is oracle workflow) , if you have option not run it in parallel , you can solved this problem.

Re: Wait Reason: STRMS

Mladen Despic — Wed, 24 Oct 2001 01:49:11 GMT

From "HP-UX Performance Cookbook", by Stephen Ciullo and Doug Grumann, may shed some light:

"...
Some other wait reasons, such as Streams (Streams subsystem I/O) are trickier. If a process is spending most of its time blocked on Streams, then it may be waiting because a network is bottlenecked, but (more likely) it is idle reading from a Stream waiting until something writes to it. User login shells sit in Stream wait when waiting for terminal input.
... "

Re: Wait Reason: STRMS

Carlos Fernandez Riera — Wed, 24 Oct 2001 07:48:46 GMT

Not checked by me ( by now):

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x8cb653921f1ad5118fef0090279cd0f9,00.html