Performance issues

[7280]

Hi,
not sure if i have to post here or in lotus forum.

I'm running lotus notes server (6.5.4) on redhat enterprise linux advanced server 3 upd 3.
Server has 2 cpu Intel(R) XEON(TM) MP CPU 1.90GHz, 3 gb ram and 8 gb ram on internal disks.
As I've already said on this system there's lotus notes running with its http server.
Lotus data are on an external storage (fastt) accessed with RDAC drivers and lotus archive data are on another storage, nas.

The problem is that on this system lotus often hangs. At that time I see 100% iowait: if I try to do an ls on the external data storage (fastt) command hangs.
I think there can be a problem with rdac driver maybe but I don't know how to be sure about this.

There are also performance problems (cpu and ram) on it. I think I need newer hardware because I see that cpu is much stressed and also ram:

VMSTAT OUTPUT:
procs memory swap io system cpu
r b swpd free buff cache si so bi bo in cs us sy wa id
27 4 762624 19984 42528 3394492 40 45 10 13 33 50 7 3 21 8
3 0 762980 31884 42736 3381700 142 266 4076 2259 1002 4916 14 5 50 31
15 2 762152 43660 42812 3370304 90 19 974 156 1076 4323 13 4 14 69
9 1 761748 39892 42900 3374000 76 2 197 310 1133 4190 21 4 20 55
14 1 760936 23980 42952 3390360 93 51 1472 211 1923 5083 28 11 18 43

FREE OUTPUT:
total used free shared buffers cached
Mem: 3889416 3865500 23916 0 42952 3390436
-/+ buffers/cache: 432112 3457304
Swap: 8192944 760912 7432032

What do you think about this?
The most cpu consuming processes are lotus notes related (http, server, update).
Unfortunately I know nothing about notes and rdac.
Please advice, thanks.

 

[7280]

Hi,
can anyone please just tell if column procs r of vmstat output is ok?
Thanks

 

[ProbablyDown]

Not sure... But have you checked how big your swap space is? Another thing to make sure is that you don't have a filesystem at 100%? (df -h).

Not sure outside of the regular i/o checks... alot of swapping will show that your swap space is too small... maybe you will have to make it much larger?

Just a guess - Hope it triggers a few other ideas!!

 

[ady2k]

You can run the command below here:
# top

And trying to see which process has used a lot of your memory.
Maybe you can kill the process if you don't need that process.
Good Luck.....

Cheers.....