topic Re: Performance in Operating System - HP-UX

Performance

Fuad_1 — Sun, 23 Nov 2003 01:58:06 GMT

Users were experiencing performance in connections although when I check the heath in the server (CPU, Memory) it was looking fine to me.

Re: Performance

Michael Tully — Sun, 23 Nov 2003 02:05:30 GMT

First you may wish to look at the NIC card performance, like is it running as full or half duplex. It should be full duplex.
e.g. assuming lan card 0
# lanadmin -x 0
Have a look at the lost and collision packets in the interactive screens.
# lanadmin

Is there high disk IO ? glance is a good place to have it, or use something like 'sar -d 5 5'

Re: Performance

Fuad_1 — Sun, 23 Nov 2003 02:20:03 GMT

LanCard is performing at full duplex, io is normal. When a user/developer telnet to the server, it takes a while and it gives the login screen, or some time it gives time out.

Re: Performance

Steven E. Protter — Sun, 23 Nov 2003 02:21:40 GMT

Here is a performance data collection script. If it not networking, these scripts will help.

Also, make sure your switch settings are correct. Autonegotiate for 1000 BT explicit for slower cards.

SEP

Re: Performance

Michael Tully — Sun, 23 Nov 2003 02:36:28 GMT

I get the impression that the problem seems to be connection related and not really performance related. You should probably check how the connection is made, i.e. DNS for the server lookup from the workstation, are they on different subnets, routing etc.

Re: Performance

Fuad_1 — Sun, 23 Nov 2003 03:16:54 GMT

Now, users can connect to the server through front end application or directly, but they disconnected after some time.

Re: Performance

Norman_21 — Sun, 23 Nov 2003 03:25:55 GMT

Fuad,

What is in your /var/adm/syslog/syslog.log file.
Is there any changes in the /etc/resolv.conf

DO this :

#insf -d /dev/telm
#insf -d /dev/tels

This will re-install the device driver for the telent. Also, it might be a telnet patch problem.
Check to see if you have the following patch:
PHNE_26096

Good luck.

Re: Performance

Fuad_1 — Sun, 23 Nov 2003 04:01:24 GMT

I can not see any clue in syslog file, also resolv.conf is not exit in this serve, or other servers. I don't think is telnet problem, as it's new server with HPUX11.11i, and other servers are new with same spec's.

Re: Performance

Norman_21 — Sun, 23 Nov 2003 05:31:31 GMT

Check to see if you have duplicate IP address in the network!
I just guessed that the /etc/resolv.conf could delay the login prompt if it's not configured properly but since it's not there then the Server doesn't need it. It's only for DNS resolution.

Re: Performance

Mohanasundaram_2 — Tue, 25 Nov 2003 23:32:14 GMT

Hai
check ur /etc/nsswitch.conf file how it is resolv the hosts.if it resolving through DNS servers first,check ur DNS server is working properly,or check ur /etc/hosts.

Mohan

Re: Performance

Fuad_1 — Sun, 30 Nov 2003 03:46:07 GMT

Hi,

No DNS is used for resolving. Below is the contents of /etc/nsswitch.conf

hosts: files
aliases: files

Re: Performance

Sanjay_6 — Sun, 30 Nov 2003 04:25:35 GMT

Hi,

This could be related the reverse lookup problem that is faced by users telnetting to the system. If you are facing the same problem if you telnet from your workstation, then put your ip address with some xyz hostname in the /etc/hosts file and then telnet to the system. If your connection is faster this time, then this points in the direction of reverse ip lookup problem.

http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000064209194

Hope this helps.

Regds

Re: Performance

Norman_21 — Sun, 30 Nov 2003 07:40:23 GMT

Fuad,

How about if you copy new configuration files from the following:

#mv /etc/nsswitch.conf /tmp
#cp /ust/newconfig/etc/nsswitch.files /etc/nsswitch.conf

I wonder why you have /etc/nsswitch file
I don't think the /etc/hosts needs it!

Just a thought!

Re: Performance

Fuad_1 — Mon, 01 Dec 2003 02:57:42 GMT

Thanks all. The problem was with the link used between the storage box and the DR one.