topic Re: slow running on RHEL AS3 in Operating System - Linux

slow running on RHEL AS3

Ryan Lee — Tue, 31 Aug 2004 23:27:17 GMT

Hardware Config :
8xCPU, 16GB memory, qlogic 2310f, EMC SAN, hp proliant DL740 Server with smart array 5i.

when the memory usage is full. the system very slow even a ls / df command.

Plase help if you have any idea.

Attacted info about command result
SysRq Memory
stat
meminfo

Re: slow running on RHEL AS3

Stuart Browne — Tue, 31 Aug 2004 23:50:42 GMT

Some more details if I could please.

What kernel revision are you running ('rpm -q kernel' and 'uname -r') ?

What directory and how many files are in the directory where you report slow ls/df responses? (or is it every directory?).

What driver version are you using for the fibre channel controller? (use 'modinfo ', or attach '/var/log/dmesg').

What's the load averate usually report?

Re: slow running on RHEL AS3

Ryan Lee — Wed, 01 Sep 2004 01:51:04 GMT

I using kernel-smp-2.4.21-15.0.4EL and qla2300 driver version is 6.07.02-RH2. the qla2300 attacted to EMC SAN, our Data szie around 400GB

Re: slow running on RHEL AS3

Don_89 — Wed, 01 Sep 2004 09:13:58 GMT

You should be running the Enterprise kernel, this is for larger smp systems (4+cpu) and high memory configurations..

Second, your system is using 530MB of RAM for the OS & applications. The rest is being used for disk cache. Memory isn't the issue.

Are you booting the OS off the SAN or are you using local disks? Also, what is the primary application on this system?

Re: slow running on RHEL AS3

dirk dierickx — Thu, 02 Sep 2004 02:08:06 GMT

have you tried looking at the number of processes and how much cpu they take? or it could also be one (or more) process is doing so much io it is killing the system.

Re: slow running on RHEL AS3

Ross Minkov — Mon, 06 Sep 2004 20:42:31 GMT

using sar might be a good idea for that system... or any other performance data collecting tools you might have at hand.

Re: slow running on RHEL AS3

Ryan Lee — Fri, 10 Sep 2004 12:21:55 GMT

I remove memory to 8GB Memory, But the system still slow and hang. I updated qlogic qla2300-7.03 and kernel-2.4.21-20ELsmp.
When I umount EMC SAN, the RHEL will back to nomarlly.

Do you kwon what is module of qla2300_conf.