10-04-2013
In terms of comparison I would also want to see the output of vmstat -s of the systems you are comparing.
It is too simple to assume that your memory is full because of file caching, unless you have statistics to show that memory is being used for caching. (vmstat -s also can say something here).
Let's assume that you have had some paging to/from paging space over the course of time. You responses may be taking longer because data that should be in (computational) memory is in paging space (where computational memory goes when AIX runs out of space).
Frequently databases do not benefit from file caching, some do, but not all. Rather than have needless page stealing activity there are different mount options you could choose (e.g., cio, rbr, rbw, rbrw - just to mention "two" (rb* are all releases behind options - one behavior type).
Hope this helps!
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Hiya all,
I am a newbie sysadmin to AIX, i have worked on HPUX for 3 years.
I have started a new role with in an IBM house and because there is me and one other there are a couple of issues I cannot work out:
We havehad a production server slowing down processing batch jbs over the past... (6 Replies)
Discussion started by: chlawren
6 Replies
2. AIX
I'm doing performance testing for one application which works on AIX.
But I don't know which performance parameters of memory need to be collected. Now, I just know very few:
1. page in
2. page out
3. fre
They are all collected by "vmstat" command.
I want to know, except for above... (2 Replies)
Discussion started by: adasong
2 Replies
3. AIX
I am trying to analyze the performance of an AIX system. I think I may have a disk I/O issue, but I am asking for help to validate or invalidate this assumption. I ran the commands below during a period of peak load.
Please help me to find any performance bottlenecks. Thanks in advance for your... (15 Replies)
Discussion started by: jhall
15 Replies
4. UNIX for Advanced & Expert Users
Hi people,
Does anyone know how the AIX form the hdisk addresses ? I mean, if the AIX use the SAN fields like switch id, domain id, port id and etc...
After I understand that my next question is: Why the AIX do not change the hdisks addressing if I change the AIX HBAs of the SAN switch and/or... (1 Reply)
Discussion started by: rapina
1 Replies
5. Linux
Hello friends,
I'm working on a Thesis and right now I'm in a phase of comparing a Linux vs Windows performance in similar situations on the same machine.
I'm asking here because I would like help on this, since I've always worked in Linux as an Administrator and a user, never as a... (6 Replies)
Discussion started by: lzcool
6 Replies
6. AIX
Hi Guys,
This is the situation I am in. Provide your views and input where should I start?
I have one P7 test server and a p520 production server. the job is taking pretty long on the P7 test server when compared to the P5 production server. below is the full detail.
Informix... (5 Replies)
Discussion started by: ithinksgreen
5 Replies
7. AIX
Dear all experts,
I have a p750 Power 7 3.3GHz server with 4 processors and 48GB Memory. This is a DB server which is using Oracle 9i.
I have been told that Oracle 9i can only allocate 10GB as SGA Max to get the oracle optimum performance. Anything more will result in overflow of memory and will... (1 Reply)
Discussion started by: kwliew999
1 Replies
8. Solaris
Hi Experts,
Our servers running Solaris 10 with SAP Application. The memory utilization always >90%, but the process on SAP is too less even nothing.
Why memory utilization on solaris always looks high?
I have statement about memory on solaris, is this true:
Memory in solaris is used for... (4 Replies)
Discussion started by: edydsuranta
4 Replies
9. AIX
Good Day Everyone,
Just wonder anyone has encounter AIX 6.1 Memory Performance issues ? What I have in my current scenario is we have 3 datastage servers (Segregate server and EE jobs - for those who know Datastage achitect) and 2 db servers(running HA to load balance 4 nodes partitions for... (3 Replies)
Discussion started by: ckwan
3 Replies
10. AIX
Hi,
I'm supposed to capture many performance stats on AIX 6 and stuck up with below:
Priority queue
Disk cache hit%
Page out rate
Swap out rate
Memory queue
I see vmstatis helpful for "page out" but not sure how to get the "rate".
Could anyone please let me know how to get these... (4 Replies)
Discussion started by: reddyr
4 Replies
LEARN ABOUT MOJAVE
fs_getclientaddrs
FS_GETCLIENTADDRS(1) AFS Command Reference FS_GETCLIENTADDRS(1)
NAME
fs_getclientaddrs - Displays the client interfaces to register
SYNOPSIS
fs getclientaddrs [-help]
fs gc [-h]
fs getcl [-h]
DESCRIPTION
The fs getclientaddrs command displays the IP addresses of the interfaces that the local Cache Manager registers with a File Server when
first establishing a connection to it.
The File Server uses the addresses when it initiates a remote procedure call (RPC) to the Cache Manager (as opposed to responding to an RPC
sent by the Cache Manager). There are two common circumstances in which the File Server initiates RPCs: when it breaks callbacks and when
it pings the client machine to verify that the Cache Manager is still accessible.
If an RPC to that interface fails, the File Server simultaneously sends RPCs to all of the other interfaces in the list, to learn which of
them are still available. Whichever interface replies first is the one to which the File Server then sends pings and RPCs to break
callbacks.
fs_setclientaddrs(1) explains how the Cache Manager constructs the list automatically in kernel memory as it initializes, and how to use
that command to alter the kernel list after initialization.
CAUTIONS
The File Server uses the list of interfaces displayed by this command only when selecting an alternative interface after a failed attempt
to break a callback or ping the Cache Manager. When responding to the Cache Manager's request for file system data, the File Server replies
to the interface which the Cache Manager used when sending the request. If the File Server's reply to a data request fails, the file server
machine's network routing configuration determines which alternate network routes to the client machine are available for resending the
reply.
The displayed list applies to all File Servers to which the Cache Manager connects in the future. It is not practical to register different
sets of addresses with different File Servers, because it requires using the fs setclientaddrs command to change the list and then
rebooting each relevant File Server immediately.
The displayed list is not necessarily governing the behavior of a given File Server, if an administrator has issued the fs setclientaddrs
command since the Cache Manager first contacted that File Server. It determines only which addresses the Cache Manager registers when
connecting to File Servers in the future.
The list of interfaces does not influence the Cache Manager's choice of interface when establishing a connection to a File Server.
OPTIONS
-help
Prints the online help for this command. All other valid options are ignored.
OUTPUT
The output displays the IP address of each interface that the Cache Manager is currently registering with File Server processes that it
contacts, with one address per line. The File Server initially uses the first address for breaking callbacks and pinging the Cache Manager,
but the ordering of the other interfaces is not meaningful.
EXAMPLES
The following example displays the two interfaces that the Cache Manager is registering with File Servers.
% fs getclientaddrs
192.12.105.68
192.12.108.84
PRIVILEGE REQUIRED
None
SEE ALSO
fileserver(8), fs_setclientaddrs(1)
COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 FS_GETCLIENTADDRS(1)