[THIN] Re: Context Switches

  • From: "Schneider, Chad M." <CMSchneider@xxxxxxxxx>
  • To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
  • Date: Wed, 12 Mar 2003 11:40:52 -0600

I also see that the memory, processor, everything else seems fine.

We run a VARIETY of apps. on those boxes, currently around 35 users per box.

-----Original Message-----
From: Ron Oglesby [mailto:roglesby@xxxxxxxxxxxx]
Sent: Wednesday, March 12, 2003 11:30 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Context Switches



Well context switches are really the processor switching between tasks
or going between user mode and kernel mode tasks.

A lot of time I think this can be due to the TYPE of application and
what it does. I have a document imaging/managing software at a client
that will get the context switches up in the 30 - 35,000 range with a
low proc queue and proc utilization at about 60%. This software uses a
tome of different types of databases (SQL, Oracle, and something else)
as different backend servers and is a little graphic intense. The NICs,
Memory, Disk, Proc all are still ok, but every time we get these things
up to 30,000 performance starts to degrade. Now of course this is 30,000
steadily, not spikes. And only 27-30 users on DL 360 G2's
Of course on the same hardware and builds I am hosting Office apps for
like 50 and 60 users with context switches not a problem.

Anyway, haven't found a relief for it yet. Hoping hyper threading has an
effect on this.





Ron Oglesby
Senior Technical Architect
=20
RapidApp
Office 312.372.7188
Mobile 312.961.2380
email roglesby@xxxxxxxxxxxx
=20


-----Original Message-----
From: Schneider, Chad M. [mailto:CMSchneider@xxxxxxxxx]=20
Sent: Wednesday, March 12, 2003 11:20 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Re: Context Switches



I know one really spiked, as the chart now shows the 125,000 marker.

-----Original Message-----
From: Ron Oglesby [mailto:roglesby@xxxxxxxxxxxx]
Sent: Wednesday, March 12, 2003 11:02 AM
To: thin@xxxxxxxxxxxxx
Subject: [THIN] Re: Context Switches



100,000... Cooooool

What type of hardware. DL 360s start to get slow at like 30,000

Ron Oglesby
Senior Technical Architect
=3D20
RapidApp
Office 312.372.7188
Mobile 312.961.2380
email roglesby@xxxxxxxxxxxx
=3D20


-----Original Message-----
From: Schneider, Chad M. [mailto:CMSchneider@xxxxxxxxx]=3D20
Sent: Wednesday, March 12, 2003 10:50 AM
To: 'thin@xxxxxxxxxxxxx'
Subject: [THIN] Context Switches



Any way to tell which app/apps are causing my large context switch
usage?

My servers run high all day, some spikes over 100,000.

Chad M. Schneider
Technology Analyst II
Curwood, Inc.
Phone: 920-303-7609
Pager: 920-909-7609


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