08-10-2009
Performance diagnosis & tuning
Hi,
I am facing a strange issue. Application is deployed in a cluster with 2 Unix nodes (with same configuration). On one node the application is working fine but on another node we see this behavior I found using vmstat- when the server is not yet started everything is OK; when you start the server it is still Ok, but the moment you make the very first request the CPU usage is 90% and then it remains consistently at 90%. the moment I stop the Websphere server it CPU usage comes down back to normal.
What all can be the issue and what do I need to check to diagnose the problem
Thanks,
AB
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
can someone tell me a good site to go to in order to learn this. please do not recommen nay books because i dont have interest in that. if you know of any good sites with good straight forward explanation on how to split loads on machines that has excessive loading, please let me know
Also,... (1 Reply)
Discussion started by: TRUEST
1 Replies
2. Filesystems, Disks and Memory
Hi all,
long time ago I posted something, but now, it is needed again :(
Currently, I am handling with a big NFS Server for more than 200 clients, this sever has to work with 256 NFSDs. Because of this huge amount of NFSDs, there are thousands of small write accesses down to the disk and... (3 Replies)
Discussion started by: malcom
3 Replies
3. UNIX for Dummies Questions & Answers
Hi to all,
I'm interested in finding an introduction about Performance Tuning under Unix (or Linux); can somebody please point me in the right direction?
Best regards (1 Reply)
Discussion started by: domyalex
1 Replies
4. Shell Programming and Scripting
Sorry,
This is out of scope of this group.But I require the clarification pretty urgently.
My Oracle database is parallely enabled.
Still,in a particular table queries do not work "parallely" always.
How is this? (9 Replies)
Discussion started by: kthri
9 Replies
5. Shell Programming and Scripting
Hi All,
In last one week, i have posted many questions in this portal. At last i am succeeded to make my 1st unix script.
following are 2 points where my script is taking tooooo long.
1. Print the total number of records excluding header & footer. I have found that awk 'END{print NR -... (2 Replies)
Discussion started by: Amit.Sagpariya
2 Replies
6. AIX
Please take a look at this system and give your analysis / advice. Can it be tuned to get a better performance?
We are not getting more hardware ressources at the moment.
We have to live with what we have. Application running on the system is SAS. OS is AIX 6.1
Let me know if you need output of... (7 Replies)
Discussion started by: firefox111
7 Replies
7. Solaris
Dear all,
I have a Local zone , where users feel that performance is not good.
Is it wise to collect the inputs from the local zone rather than taking from the global zone.
And also Can I tune from Global zone , so that it will reflect in local zone.
Rgds
rj (2 Replies)
Discussion started by: jegaraman
2 Replies
8. Solaris
Hello Forum,
Well I am fairly new to this Solaris os thing. One thing I would like to check for system health and performance.
I know the codes like
prstat,vmstat,sar,iostat,netstat,prtdiag -v,
What else does a want to be sys admin have to look for when checking a solaris box?
I know... (3 Replies)
Discussion started by: br1an
3 Replies
9. AIX
I have a IBM Power9 server coupled with a NVMe StorWize V7000 GEN3 storage, doing some benchmarks and noticing that single thread I/O (80% Read / 20% Write, common OLTP I/O profile) seems slow.
./xdisk -R0 -r80 -b 8k -M 1 -f /usr1/testing -t60 -OD -V
BS Proc AIO read% IO Flag IO/s ... (8 Replies)
Discussion started by: c3rb3rus
8 Replies
CRM_MON(8) [FIXME: manual] CRM_MON(8)
NAME
crm_mon - monitor the cluster's status
SYNOPSIS
crm_mon [-V] -d -pfilename -h filename
crm_mon [-V] [-1|-n|-r] -h filename
crm_mon [-V] [-n|-r] -X filename
crm_mon [-V] [-n|-r] -c|-1
crm_mon [-V] -i interval
crm_mon -?
DESCRIPTION
The crm_mon command allows you to monitor your cluster's status and configuration. Its output includes the number of nodes, uname, uuid,
status, the resources configured in your cluster, and the current status of each. The output of crm_mon can be displayed at the console or
printed into an HTML file. When provided with a cluster configuration file without the status section, crm_mon creates an overview of nodes
and resources as specified in the file.
OPTIONS
--help, -?
Provide help.
--verbose, -V
Increase the debug output.
--interval seconds, -i seconds
Determine the update frequency. If -i is not specified, the default of 15 seconds is assumed.
--group-by-node, -n
Group resources by node.
--inactive, -r
Display inactive resources.
--as-console, -c
Display the cluster status on the console.
--one-shot, -1
Display the cluster status once on the console then exit (does not use ncurses).
--as-html filename, -h filename
Write the cluster's status to the specified file.
--daemonize, -d
Run in the background as a daemon.
--pid-file filename, -p filename
Specify the daemon's pid file.
--xml-file filename, -X filename
Specify an XML file containing a cluster configuration and create an overview of the cluster's configuration.
EXAMPLES
Display your cluster's status and get an updated listing every 15 seconds:
crm_mon
Display your cluster's status and get an updated listing after an interval specified by -i. If -i is not given, the default refresh
interval of 15 seconds is assumed:
crm_mon -i interval[s]
Display your cluster's status on the console:
crm_mon -c
Display your cluster's status on the console just once then exit:
crm_mon -1
Display your cluster's status and group resources by node:
crm_mon -n
Display your cluster's status, group resources by node, and include inactive resources in the list:
crm_mon -n -r
Write your cluster's status to an HTML file:
crm_mon -h filename
Run crm_mon as a daemon in the background, specify the daemon's pid file for easier control of the daemon process, and create HTML output.
This option allows you to constantly create HTML output that can be easily processed by other monitoring applications:
crm_mon -d -p filename -h filename
Display the cluster configuration laid out in an existing cluster configuration file (filename), group the resources by node, and include
inactive resources. This command can be used for dry-runs of a cluster configuration before rolling it out to a live cluster.
crm_mon -r -n -X filename
FILES
/var/lib/heartbeat/crm/cib.xml--the CIB (minus status section) on disk. Editing this file directly is strongly discouraged.
AUTHOR
crm_mon was written by Andrew Beekhof.
[FIXME: source] 07/05/2010 CRM_MON(8)