[THIN] Re: 2003 TS Perf Problem - best way to 100% find it
- From: "Tim Mangan" <tmangan@xxxxxxxxxxxx>
- To: <thin@xxxxxxxxxxxxx>
- Date: Tue, 13 Jul 2004 09:04:51 -0400
You should continue to try to figure out if the issue is memory or CPU.
Since you hear about the problems at 40-60% CPU and close/open clears it out
I would guess that it is memory. However, you also indicated that paging is
OK so you need to look at the question of memory/cpu closer. It sounds like
you have been doing that - but keep looking!
As a note: Although 2003 seems far better than 2000, I have seen two
troubling things on 2003 that happen "now and then" which may be worth
keeping an eye out for.
One is the print spooler - all that printer mapping when a user logs on.
The spooler daemon uses way too much CPU and messes everyone up.
The second is LSAS. I don't know what it could possibly be doing to use up
as much CPU as it does at times, but one assumes that because it is so busy
it directly slows down requests that must pass through it.
The spooler can be controlled via third party apps. I know of nothing to
help LSAS - but then it hasn't been confirmed to be a problem, it is only
worrisome.
Tim Mangan
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Ron Jameson
Sent: Monday, July 12, 2004 11:27 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: 2003 TS Perf Problem - best way to 100% find it
Paging yes, but not excessively - appears normal.
We thought of checking network chatter for a bad switch or NIC, ethereal
found some transmission retries but not sure if is excessive - still under
review.
Nothing out of the ordinary on event logs
Mainly the TS is the bogged one - we have some users running local against
the same file server that do not complain.
At random times, the CPU on the TS will hit 100% for a second or 2, then
down to 20, up to 30, 40, 60, down again. We hear the problems at 40-60%.
The accounting program when it gets slow, if they close and reopen - appears
fast again so we are trying to find out why and what this program is
consuming to cause this. Even when the CPU is normal, at random times they
will still complain it is slow - close the program and reopen - appears
fine. No mem leak either.
We have been trying to talk to the programmers at the company to find out if
they can help debug their program and why it does what it does.
It is very frustrating on are part to only see 20 users on a TS before
seeing problems.
TS is optimized for programs - not background.
We are turning off hyperthreading tonight as well to compare perf. This
dual processor system has quad capable but that was my last resort if I can
pin down CPU as a root cause.
Ron
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Lilley, Brian
Sent: Monday, July 12, 2004 10:08 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: 2003 TS Perf Problem - best way to 100% find it
are there any metric's maxing out whilst the system appears to slow..
A) is the box paging??
B) are other machines suffering at this point?
C) are there any event log entries (which may appear unrelated) ?
D) does actually stop at any point.. if not a CPU/memory issue, then is
something waiting for a timeout..ie bad name resolution configuration...
E) is box configured for application optimization instead of 'Maximise Date
throughput for file sharing'?
this is just a rough guess list knocked together... best to follow a more
logical approach in the numerous troubleshooting guides...
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Ron Jameson
Sent: 12 July 2004 15:57
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: 2003 TS Perf Problem - best way to 100% find it
Originally we did not use the 3g switch. When we ran the MS Perf Advisor -
it showed 2g RAM available to users so we used the 3g to bump it to see if
it made any difference (which it did not).
Ron
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf
Of Lilley, Brian
Sent: Monday, July 12, 2004 9:46 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: 2003 TS Perf Problem - best way to 100% find it
would make more sense to remove the 3GB switch for a TS...surely?
check out the performance and optimization guides on brianmadden.com
-----Original Message-----
From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx]On
Behalf Of Ron Jameson
Sent: 12 July 2004 15:38
To: thin@xxxxxxxxxxxxx
Subject: [THIN] 2003 TS Perf Problem - best way to 100% find it
We have a new 2003 TS with under 50 users but we are having a bit of a
difficult time locating the source of the overall system slowdowns. Is
there a way to pinpoint the exact cause of a problem slowdown? The programs
used on the TS are office 2003, QBooks and other accounting programs (which
is the bulk - each session consuming 60-130mb for the accounting program @
each user). From what we see, the network bandwidth is non-existent, drive
speed/access is low but the CPU spikes randomly on this dual xeon 3ghz on a
dell PE6650. RAM is 3g, hyperthread enabled, RAID 1/5, all data on server
and apps loaded on TS.
We are just about to contact a third party to pin this down or MS PSS for I
feel me are missing something here - just not sure what. We are running the
MS service perf advisor now to see if we see anything. One of our techs did
check the PTE and recently added the /3g switch for checking if it helps.
Ron
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