[SunHELP] System Bottleneck

Fri Sep 21 10:01:07 CDT 2001

I'd start by increasing the size of the swap area. Having swap < physical is
generally a bad idea unless you are running in lazy mode. 

-----Original Message-----
From: darshan pai [mailto:darshanps at visto.com]
Sent: 21 September 2001 15:28
To: sunhelp at sunhelp.org
Subject: RE: [SunHELP] System Bottleneck

RAM - 1024 M
SWAP - approx 700 M
Thats df -k O/P
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/dsk/c0t0d0s0     830107   44418  727582     6%    /
/dev/dsk/c0t0d0s1    1987399  785591 1142187    41%    /usr
/proc                      0       0       0     0%    /proc
fd                         0       0       0     0%    /dev/fd
mnttab                     0       0       0     0%    /etc/mnttab
/dev/dsk/c0t0d0s3    1032327   13347  957041     2%    /var
swap                  717512       0  717512     0%    /var/run
/dev/dsk/c0t0d0s4    8935901 2780218 6066324    32%    /data
/dev/dsk/c0t0d0s6      96975   14183   73095    17%    /tmp
/dev/dsk/c0t0d0s5    4032142  585127 3406694    15%    /opt
/dev/dsk/c0t0d0s7     385463  321147   25770    93%    /export/home
ocd:/data            8769437 7582090 1099653    88%    /ocd

DP

-----Original Message-----
From:    Fletcher, Joe joe.fletcher at Metapack.com
Sent:    Thu, 20 Sep 2001 19:16:53 +0100
To:      sunhelp at sunhelp.org
Subject: RE: [SunHELP] System Bottleneck

Well what do you know. I run a site that uses SPM but we use Compaq Alphas.
They beat the absolute
hell out of SPARCs. An fMRI image analysis that took 2 days on the Ultra II
based E6500 we now do in 6hrs. Knowing SPM my guess is that the system may
be swapping heavily. What's the spec of the system in terms of RAM, swap etc
and how are the data volumes mounted?

-----Original Message-----
From: darshan pai [mailto:darshanps at visto.com]
Sent: 20 September 2001 17:08
To: sunhelp at sunhelp.org
Subject: RE: [SunHELP] System Bottleneck

Actually We have Matlab on one of our SUN m/cs (ULTRA 80), preferable for
running one of our other programs (SPM) which requires matlab . 
Starting matlab is fine . But when i start spm the CPU utilization increases
to abt 90% . The system bcomes dead slow . 
Running vmstat shows a very high value of system calls

I think that means that thers a SYS bottleneck right ...

DP

-----Original Message-----
From:    Fletcher, Joe joe.fletcher at Metapack.com
Sent:    Thu, 20 Sep 2001 16:44:44 +0100
To:      sunhelp at sunhelp.org
Subject: RE: [SunHELP] System Bottleneck

Corkscrew? 

Sorry, couldn't resist.

What is the bottleneck and why do you think you have one? Usual solutions
are faster networks, more memory, bigger, faster disks, extra CPUS. Define
the problem a bit more.

-----Original Message-----
From: darshan pai [mailto:darshanps at visto.com]
Sent: 20 September 2001 16:36
To: sunhelp at sunhelp.org
Subject: [SunHELP] System Bottleneck

How do I release a System Bottleneck

DP
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