SUMMARY: SRM - how many of you use it? (sunmanagers)

All,

I got four responses to my inquiry.
One was for SRM, one was sorta sitting on the fence, one was
against SRM, and lastly a request to summarize.

SRM is not a part of Solaris 8, but it is available for download.
SRM will come as a part of Solaris 9.
Basically, SRM implementation will require Solaris 8 patches
and is not straight forward.  The use of SRM may be worthwhile
if one has the time to learn how to set it up properly; else,
one would probably be better off using scripts and native Solaris
commands.



Attached below are the responses and original post.


On Apr 9, 2002 Jeffrey Liu (jliu2@hanwave.net) wrote:

jeff>
jeff> My company is considering using SRM - Solaris Resource Manager.

Cool.

jeff> I've heard that SRM is complicated, can trash your system,
jeff> may impact Oracle performance by 10% to 30%, but it
jeff> can also offer administrator  control of workload CPU shares.

Nope, nope and nope. The biggest drawback is you have to pay for it now
but it is free w/ Solaris 9.

Attached is a presentation I did for a customer on SRM and a whitepaper on
SRM (Its PostScript)

-jed




				We use in on some E4500's with Solaris 2.6.
It's a royal pain in the a**, and it complicates matters unduly. It also
creates *huge* /var/adm/messages files, since every login/logout generates
an entry. It also moves all users into a different class, so you cannot
"renice" processes on the system without jumping through priocntl hoops.

				Avoid it if you can. Just my $0.02, YMMV.
				Tom





	Jeffrey Liu <jliu2@hanwave.net>
			04/09/02 10:34 AM

	To:	sunmanagers@sunmanagers.org@SMTP@cchntmsd
	cc:
	Subject:	SRM  - how many of you use it?



				My company is considering using SRM -
Solaris Resource Manager.

				I've heard that SRM is complicated, can
trash your system,
				may impact Oracle performance by 10% to 30%,
but it
				can also offer administrator  control of
workload CPU shares.

				Question:  How many of you actually have
this running in
				production environments?  What issues
(performance or otherwise)
				have you run into?

				Thanks in advance,
				Jeff



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We are using SRM for a shared server product we have out.  The customer
buys an IP, and then gets a amount of space and bandwidth on the
server.

Some things that we have run into - on Solaris 8 there are some patches
that SUN has for SRM now, apply them!  We had SRM causing system hangs,
where the only way we could get the server to respond was issuing a
break at the console.

Some notes on the set up -
  Memeory allocations are hard.  We are using Apache and Tomcat - when
the customer compiles Tomcat, they need more memory than is allocated.
There is 2Gb of memory in the boxes, so to get around this, we allow a
customer to take 1Gb of memeory.  The 1Gb limit makes sure that no one
customer can hog the box.  In general, except for compiles, this is
never an issue.
  The box has all customer data on an external A1000.  In general, log
files are owned by root, so that the logs do not count against the
customer's quota.

FYI, SRM is going to come as part of Solaris 9.

-- 
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Andrew Stueve              |   Office 703-886-2606
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> --__--__--
>
> Message: 11
> Date: Tue, 9 Apr 2002 11:34:13 -0400 (EDT)
> From: Jeffrey Liu <jliu2@hanwave.net>
> To: <sunmanagers@sunmanagers.org>
> Subject: SRM  - how many of you use it?
>
>
> My company is considering using SRM - Solaris Resource Manager.
>
> I've heard that SRM is complicated, can trash your system,
> may impact Oracle performance by 10% to 30%, but it
> can also offer administrator  control of workload CPU shares.
>
> Question:  How many of you actually have this running in
> production environments?  What issues (performance or otherwise)
> have you run into?
>
> Thanks in advance,
> Jeff
>
>
>
> --__--__--





My company is considering using SRM - Solaris Resource Manager.

I've heard that SRM is complicated, can trash your system,
may impact Oracle performance by 10% to 30%, but it
can also offer administrator  control of workload CPU shares.

Question:  How many of you actually have this running in
production environments?  What issues (performance or otherwise)
have you run into?

Thanks in advance,
Jeff


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