In AIX 6.1 lru_file_repage is set to 0 by default. Wouldn't setting this option to 1 cause heavier paging? As you can see there are almost all lruable pages so i guess this would have performance impact. Also restricted options like lru_file_repage are not mentioned in manual pages.
About the kernel using file memory, file memory isn't only used by kernel, is it correct? Currently there is more file memory than kernel memory in use:
it's being purged once in a while (can't post URL, because i don't have 5 posts yet, so i might add it in the future posts )
i will explore the ipcs to see if i find something useful, thanks for steering
Hello,
I'm using a unix server (HP rp2450) which has : 2 Go RAM memory and 4 Go swap.
Here is the result of vmstat -n command :
$ vmstat -n
VM
memory page faults
avm free re at pi po fr de sr in sy ... (5 Replies)
This is post number 3 in a series of unanswered "TUNING" questions. :D
With AIX 5.3 TL4, the page size can vary from the original "4k". They can now be "64k" and a couple other sizes. They also do not have to all be the same. Some can remain "4k" while others are "64k" which is what seems to... (2 Replies)
Hi
I am trying to investigate a disk performance issue, and we are not seem to be hitting the right direction in our analysis.
This is a FC disk running on USP1000 HDS system. The application is an IO intensive application, but our opinion is that it is not performing due to perceived disk... (1 Reply)
Dear friends. can anybody suggest me what to be considered in order to achieve maximum performance of AIX on which DB2 will be installed
Thanks is advance :) (1 Reply)
Dears i want to have a clear view about this tuning parameters and what they related to FS or Oracle , and how to figure the percentage of them .
maxperm%
maxclient%
v_pinshm = 1
lgpg_regions = 0
lpgp_size = 0 (3 Replies)
For some reason, my AIX 5.2 box has become slow in accepting telnet requests from others boxes. Windows, times out the connection, whereas, Unix it will wait for the AIX to display the login. I connect and it respawns back and says connected, but then sits and wait for what seems forever to get the... (5 Replies)
Hi,
we've a gigabit Ethernet adapter. And we wanted to improve the performance by tuning network parameters. so' as per IBM info center,
http://publib.boulder.ibm.com/infocenter/aix/v7r1/index.jsp?topic=%2Fcom.ibm.aix.prftungd%2Fdoc%2Fprftungd%2Fnetw_opt.htm
we tried changing the tuning... (2 Replies)
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
LEARN ABOUT CENTOS
dsktune
DSKTUNE(1) General Commands Manual DSKTUNE(1)NAME
dsktune - reports memory, network, and file system tuning settings which can affect the performance of the Directory Server
SYNOPSIS
dsktune [-q] [-c] [-D] [-v] [-i installdir]
DESCRIPTION
Reports memory, network, and file system tuning settings which can affect the performance of the Directory Server
OPTIONS
A summary of options is included below:
-q dsktune only reports essential settings
-c dsktune only reports tuning information for client machines
-D dsktune also reports the commands executed
-v dsktune only reports its release version date
-i installdir
specify alternate server installation directory
AUTHOR
dsktune was written by the 389 Project.
REPORTING BUGS
Report bugs to http://bugzilla.redhat.com.
COPYRIGHT
Copyright (C) 2001 Sun Microsystems, Inc. Used by permission.
Copyright (C) 2008 Red Hat, Inc.
This manual page was written by Michele Baldessari <michele@pupazzo.org>, for the Debian project (but may be used by others).
This is free software. You may redistribute copies of it under the terms of the Directory Server license found in the LICENSE file of this
software distribution. This license is essentially the GNU General Public License version 2 with an exception for plug-in distribution.
May 18, 2008 DSKTUNE(1)