Additionally in your iostat you can see that hdisk0 and hdisk1 are heavily busy. They are about ~90-100% busy all the time while you took the measurement.
Quote:
tty: tin tout avg-cpu: % user % sys % idle % iowait
1.0 4.0 1.5 6.0 1.5 91.0
It seems you have something on these disks which should be on separate disks. As Shockneck assumes too, that hdisk0 and hdisk1 belong to your rootvg, I'd say you check what kind of application data is placed in some LV there and move it to other disks to not hinder your rootvg.
Have a lspv to check what VGs are on hdisk0 and hdisk1, then have a lsvg -l on that VG to check what FS'es are there and try to move the stuff to disks that are not that busy or to new disks.
Then capture some seconds while this problem is occuring with filemon:
Stop this with "trcstop" after some 20-30 seconds.
You can check the file with
You should see which LV etc. is the most busy to be sure what is making trouble there.
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)
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)
Gurus, i have process that runs 5 times a day.
it runs normally (takes about 1 hour) to complete in 3 runs
but it is takes about ( 3 hrs to complete) two times
So i need to figure out why it takes significanlty high time during
those 2 runs.
The process is a shell script that connect to... (2 Replies)
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)
Hello
I am new user of AIX; I have only basic knowledge of the UNIX commands, and I want to create script that will monitor the performance and resources usage on AIX 6.1 machine.
Basically I wan to start a loop that will grab, every 10 seconds, the CPU usage, the memory usage, the disk usage,... (1 Reply)
Hi,
I would like to hear your thoughts about this. We are running our Data warehouse on DB2 DPF (partition environment) and I have notice that sometimes we hit the Asynchronous-I/O-Processes peak. DB2 relies heavily on Asynchronous I/O so I would believe this has an negative impact.We are... (10 Replies)
Hello,
I encounter some performance issues on my AIX 5.3 server running in a LPAR on a P520. How do I investigate performance issues in AIX. Is there any kind of procedure that takes me to the steps to investigate my server and find the sub systems that is causing the issues?
The performance... (1 Reply)
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)
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 HPUX
vgmove
vgmove(1M)vgmove(1M)NAME
vgmove - move data from an old set of disks in a volume group to a new set of disks
SYNOPSIS
autobackup] diskmapfile vg_name
autobackup] diskfile diskmapfile vg_name
DESCRIPTION
The command migrates data from the existing set of disks in a volume group to a new set of disks. After the command completes successfully,
the new set of disks will belong to the same volume group. The command is intended to migrate data on a volume group from old storage to
new storage. The diskmapfile specifies the list of source disks to move data from, and the list of destination disks to move data to. The
user may choose to list only a subset of the existing physical volumes in the volume group that need to be migrated to a new set of disks.
The format of the diskmapfile file is shown below:
source_pv_1 destination_pv_1_1 destination_pv_1_2 ....
source_pv_2 destination_pv_2_1 destination_pv_2_2 ....
....
source_pv_n destination_pv_n_1 destination_pv_n_2 ....
If a destination disk is not already part of the volume group, it will be added using see vgextend(1M). Upon successful completion of the
source disk will be automatically removed from the volume group using see vgreduce(1M).
After successful migration, the destination disks are added to the LVM configuration files; namely, or The source disks along with their
alternate links are removed from the LVM configuration files.
A sample diskmapfile is shown below:
/dev/disk/disk1 /dev/disk/disk51 /dev/disk/disk52
/dev/disk/disk2 /dev/disk/disk51
/dev/disk/disk3 /dev/disk/disk53
The diskmapfile can be manually created, or it can be automatically generated using the diskfile and diskmapfile options. The argument
diskfile contains a list of destination disks, one per line such as the sample file below:
/dev/disk/disk51
/dev/disk/disk52
/dev/disk/disk53
When the option is given, reads a list of destination disks from diskfile, generates the source to destination mapping, and saves it to
diskmapfile.
The volume group must be activated before running the command. If the command is interrupted before it completes, the volume group is in
the same state it was at the beginning of the command. The migration can be continued by running the command with the same options and
disk mapping file.
Options and Arguments
The command recognizes the following options and arguments:
vg_name The path name of the volume group.
Set automatic backup for this invocation of
autobackup can have one of the following values:
Automatically back up configuration changes made to the volume group.
This is the default.
After this command executes, the command is executed for the volume group; see vgcfgbackup(1M).
Do not back up configuration changes this time.
Specify the name of the file containing the
source to destination disk mapping. If the option is also given, will generate the disk mapping and save it to
this filename. (Note that if the diskmapfile already exists, the file will be overwritten). Otherwise, will
perform the data migration using this diskmapfile.
Specify the name of the file containing the
list of destination disks. This option is used with the option to generate the diskmapfile.
When the option is used, no volume group data is moved.
Preview the actions to be taken but do not
move any volume group data.
Shared Volume Group Considerations
For volume group version 1.0 and 2.0, cannot be used if the volume group is activated in shared mode. For volume groups version 2.1 (or
higher), can be performed when activated in either shared, exclusive, or standalone mode.
Note that the daemon must be running on all the nodes sharing a volume group activated in shared mode. See lvmpud(1M).
When a node wants to share the volume group, the user must first execute a if physical volumes were moved in or out of the volume group at
the time the volume group was not activated on that node.
LVM shared mode is currently only available in Serviceguard clusters.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified or is null, it defaults to "C" (see lang(5)).
If any internationalization variable contains an invalid setting, all internationalization variables default to "C" (see environ(5)).
EXAMPLES
Move data in volume group from to After the migration, remove from the volume group:
Generate a source to destination disk map file for where the destination disks are and
SEE ALSO lvmpud(1M), pvmove(1M), vgcfgbackup(1M), vgcfgrestore(1M), vgextend(1M), vgreduce(1M), intro(7), lvm(7).
vgmove(1M)