[THIN] Re: XP servers running Visual FoxPro v6 app frequent locking
- From: "Mack, Rick" <RMack@xxxxxxxxxxxxxx>
- To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
- Date: Sat, 28 Jun 2003 05:43:18 +1000
Hi Jason,
There are a lot of different reasons for apparent system lockups, some fixed
by hotfixes, but 2 common ones are exhaustion of network i/o request queues,
and excessive swapping. The latter doesn't actually lock the system, it's
just so slow it might as well be locked.
First thing I'd do is tune maxmpxct/maxworkitems on your back-end file
server(s). Make absolutely certain your anitvirus software is set for
inbound files only and that they're not doing anything crazy like backups
during the day.
Then I'd be tempted to take one of the servers and install SP4.
Depending on the frequency of lockups, leaving a perfmon or task manager
session running on the console can be enlightening, or getting and
installing a copy of Remote Task Manager might give you a clue as to whats
happening before the lockup. Another option is to run a system in debug
mode, attach a null-modem cable and monitor it with a PC running windbg.
Regards,
Rick
Ulrich Mack
rmack@xxxxxxxxxxxxxx
Volante Systems
18 Heussler Terrace, Milton 4064
Queensland Australia
tel +61 7 32467704
-----Original Message-----
From: Weems, Jason [mailto:jason.weems@xxxxxxxxxxxxx]
Sent: Saturday, 28 June 2003 2:49 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] XP servers running Visual FoxPro v6 app frequent locking
Hi all,
We am having an issue where our Citrix XPe servers (6 servers servicing =
this application) running a 3rd party Delphi v6 app are frequently = locking
up. Lockups may be caused by the application; however, we have = no good
way of verifying this. We have tried getting crash dumps from = the
servers; however, the system locks hard to the point where it does = not
seem to save a dump file. =20
Other XPe servers not running this application do not seem to experience =
the same issue. We have noticed high context switching and pagefile =
utilization on the severs. =20
Server hardware: (2) UW3 18GB HD, Quad Xeon 1.3Ghz machines, 2Gb Ram
Any suggestions would be greatly appreciated.
Thanks,
Jason Weems
Sr. Network Systems Engineer=20
Citigroup Real Estate Servicing & Technology - Systems Engineering
Office: (314)275-1142
Fax: (314)469-2839=20
jason.weems@xxxxxxxxxxxxx=20
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