RE: Strange performance
- From: "Jim Harrison" <Jim@xxxxxxxxxxxx>
- To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
- Date: Sat, 22 Jan 2005 06:45:12 -0800
How are you determining that the upstream ISA is the bottleneck - perfmon,
netmon...?
-----Original Message-----
From: Darko Kljajic [mailto:darko@xxxxxxxxxxxxxxxx]
Sent: Saturday, January 22, 2005 4:20 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Strange performance
http://www.ISAserver.org
I already implemented that solution (for DNS name resolution) on downstream isa
servers.
(I repeat) Everything works just fine until isa start to work slow for no
reason.
When I saw ISA to slow down I instantly log on to upstream isa servers and I
saw that upstream servers were bottleneck. Those two servers alone cannot
retrive pages fast (they are not cache servers).
ISA works fast and 10 min extra slow â fast â slow â I spent so much time
for this project and I donât want to see that ISA work slow for no reason. â
Darko KljajiÄ
Administrator for operating systems
IT Department
tel: +381 11 201 1567
mob: +381 64 811 1655
e-mail: darko@xxxxxxxxxxxxxxxx
===========================
Delta Banka A.D.
Milentija PopoviÄa 7b, Belgrade
Serbia & Montenegro
site: www.deltabanka.co.yu
===========================
________________________________________
From: josephk [mailto:josephk@xxxxxxxxx]
Sent: 21. januar 2005 20:39
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Strange performance
http://www.ISAserver.org
Hi Darko,
I run back to back networks with ISA and donâtâ have the slowness problem.
I do sometimes receive pages that are garbled and look like binary
representations of the pages and or items that I was trying to download.
After I refresh my page that disappears. Not sure if this is related to
caching on ISA or not. The other issue is how the front end ISA is using DNS
to get pages or to your backend ISA. And then again from your backend ISA out
to the front-end ISA and external network. Thomas showed me this link which
helped on speed
http://www.microsoft.com/technet/prodtechnol/isa/2004/plan/disablenameresolution.mspx
and DNS resolution.
Thank you,
Joseph
________________________________________
From: Ball, Dan [mailto:DBall@xxxxxxxxxxx]
Sent: Friday, January 21, 2005 10:41 AM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: Strange performance
http://www.ISAserver.org
I donât know why this happens, but I have seen it happen here. In fact, I
had an open support case with Microsoft at the time about this, and sent them
diagnostic logs while it was happening, which they are still perusing.
________________________________________
From: Darko Kljajic [mailto:darko@xxxxxxxxxxxxxxxx]
Sent: Friday, January 21, 2005 12:42
To: [ISAserver.org Discussion List]
Subject: [isalist] Strange performance
http://www.ISAserver.org
Hi to all,
I have installed four ISA Servers 2004 in back to back configuration. (test
prepare to go live) I have two downstream isa servers with NIC Teming for every
network and NLB only for Internal network (caching servers) + two upstream isa
servers also with NLB and Teaming.
Everything works fine (almost perfectly) â until ISAs suddenly get lazy. ISAs
retrive sites so slowly that everyone start to complain.
I look up in router log (router to internet provider) and I saw that our link
have always spare 100 kbytes/s. So I supposed that network bandwidth isnât a
problem. I also look in ISAs performance counters and everything looks fine
(COLD).
I do all the tuning for operating systems (3GB switch â) and I give
downstream ISAs to use 50% of memery for caching.
Does anyone have a clue what is happening??
Hardware configuration (4 servers):
2 x 3.06GHz
4GB RAM
256 MB SCSI Controler
3 x 36GB Hard Disks
4 (6) NIC
PS: NLB works with Layer3 Switch
Darko KljajiÄ
Administrator for operating systems
IT Department
tel: +381 11 201 1567
mob: +381 64 811 1655
e-mail: darko@xxxxxxxxxxxxxxxx
===========================
Delta Banka A.D.
Milentija PopoviÄa 7b, Belgrade
Serbia & Montenegro
site: www.deltabanka.co.yu
===========================
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