Sponsored Content
Operating Systems AIX Performance issue / tuning advice Post 302480529 by zaxxon on Wednesday 15th of December 2010 09:15:26 AM
Old 12-15-2010
Beside the changes to CPUs, I would just change the
Code:
j2_dynamicBufferPreallocation=128

and if it doesn't help, additionally
Code:
j2_nBufferPerPagerDevice=2048

Monitor the increase of
Code:
    596244370 external pager filesystem I/Os blocked with no fsbuf

per day for some days and check if the difference per day decreases after making the recommended changes.
Let us know what vmstat looks like when you have 6 virtual CPUs. Setting up a long time monitoring might reveal when the paging in/out to Paging Space occurs.

---------- Post updated at 03:15 PM ---------- Previous update was at 02:11 PM ----------

I did not mention the pc column of vmstat so far; it constantly shows a pc (physical cpu consumption) of 3.0 which is all you have. Even changing it to more virtual CPUs might not really unburden your 3 physical CPUs. I would strongly go for more CPU units for that LPAR or check out if there is any optimizations possible in the way the application works (code, config, ...).

Last edited by zaxxon; 12-16-2010 at 04:44 AM.. Reason: zaxxon, the word is "physical", "physical", "phy...."...
This User Gave Thanks to zaxxon For This Post:
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Performance tuning.

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

EXT3 Performance tuning

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

Performance Tuning

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

Oracle-performance tuning

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

Performance Tuning

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. UNIX for Advanced & Expert Users

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... (3 Replies)
Discussion started by: ash.abrol
3 Replies

7. Solaris

Solaris Performance tuning

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. Tips and Tutorials

The Most Incomplete Guide to Performance Tuning

Overview: Introduction What Does Success Mean? What Does Performance Mean? Every Picture is Worth a Thousand Words Work Like a Physicist Work Like You Walk - One Step at a Time Learn to Know Your System Choose Your Weapons! Tools of the Trade 1 - vmstat A Little Theory Along the Way -... (1 Reply)
Discussion started by: bakunin
1 Replies

9. AIX

IBM AIX I/O Performance Tuning

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
tuned(8)						   Adaptive system tuning daemon						  tuned(8)

NAME
tuned - dynamic adaptive system tuning daemon SYNOPSIS
tuned [options] DESCRIPTION
tuned is a dynamic adaptive system tuning daemon that tunes system settings dynamically depending on usage. OPTIONS
-c CONFFILE, --conffile=CONFFILE Specify the name and path of the configuration file. By default the /etc/tuned.conf is used. -d, --daemon This options starts tuned as a daemon as opposed to in the foreground without forking at startup. -D, --debug Sets the highest logging level. This could be very useful when having trouble with tuned. -h, --help Show this help. -l [LOG], --log[=LOG] Log to the file LOG. If no LOG file is specified /var/log/tuned/tuned.log is used. --no-dbus Do not attach to DBus. -P [PID], --pid[=PID] Write process ID to the PID file. If no PID file is specified /run/tuned/tuned.pid is used. -p PROFILE, --profile PROFILE Tunning profile to be activated. It will override other settings (e.g. from tuned-adm). This is intended for debugging pur- poses. -v, --version Show version information. FILES
/etc/tuned /usr/share/doc/tuned-*/README SEE ALSO
tuned.conf(5) tuned-adm(8) AUTHOR
Jan Kalua <jkaluza@redhat.com> Jan Velak <jvcelak@redhat.com> Jaroslav karvada <jskarvad@redhat.com> Phil Knirsch <pknirsch@redhat.com> REPORTING BUGS
Report bugs to <power-management@lists.fedoraproject.org>. Fedora Power Management SIG 28 Mar 2012 tuned(8)
All times are GMT -4. The time now is 08:29 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy