02-08-2012
and post the filesystem_io_options of oracle + oracle version + something about your disk layout - so are your filesystems setup with min or max distribution, blocksize ...
output of mount command will help and definitely mounting your oracle filesystems with noatime option and if you have a dedicated dump device with rbrw
If you dont want to use SETALL in filesystem_io_options than you might want to consider the filesystems containing oracle data + redologs to be mounted with cio, how many volumegroups with how many disks do you have and similar things
In many cases a hot disk is easily avoidable by changing your filesystems from minimum to maximum distribution and reorganize the volumegroup
I would be in addition interested in vmstat -v and vmstat -s outputs on top of what zaxxon asked for already.
Please gather all data during the time where the system is busy and slow - not during an idle timeframe or the data wont help
9 More Discussions You Might Find Interesting
1. UNIX for Advanced & Expert Users
Hi you all, I have a BIG performance problem on an Sun E3500, the scenario is described below:
I have several users (30) accessing via samba to the E3500 using an application built on Visual Foxpro from their Windows PC , the problem is that the first guy that logs in demands 30% of the E3500... (2 Replies)
Discussion started by: alex blanco
2 Replies
2. Filesystems, Disks and Memory
Hello,
i have a a1000 connected to an e6500. There's a raid 10 (12 disks) on the a1000.
If i do a
dd if=/dev/zero of=/mnt/1 bs=1024k count=1000
and then look at iostat it tells me there's a kw/s of 25000.
But if i do a
dd of=/dev/zero if=/mnt/1 bs=1024k count=1000
then i see only a... (1 Reply)
Discussion started by: mbrenner
1 Replies
3. UNIX for Dummies Questions & Answers
Hello,
I'm running a script on AIX to process lines in a file. I need to enclose the second column in quotation marks and write each line to a new file. I've come up with the following:
#!/bin/ksh
filename=$1
exec >> $filename.new
cat $filename | while read LINE
do
echo $LINE | awk... (2 Replies)
Discussion started by: scooter53080
2 Replies
4. UNIX for Advanced & Expert Users
Hello all
We just built a storage cluster for our new xenserver farm. Using 3ware 9650SE raid controllers with 8 x 1TB WD sata disks in a raid 5, 256KB stripe size.
While making first performance test on the local storage server using dd (which simulates the read/write access to the disk... (1 Reply)
Discussion started by: roli8200
1 Replies
5. Solaris
Hello,
we have a machine with Solaris Express 11, 2 LSI 9211 8i SAS 2 controllers (multipath to disks), multiport backplane, 16 Seagate Cheetah 15K RPM disks.
Each disk has a sequential performance of 220/230 MB/s and in fact if I do a
dd if=/dev/zero of=/dev/rdsk/<diskID_1> bs=1024k... (1 Reply)
Discussion started by: golemico
1 Replies
6. Solaris
Hello guys,
I have two servers performing the same disk operations. I believe one server is having a disk's impending failure however I have no hard evidence to prove it. This is a pair of Netra 210's with 2 drives in a hardware raid mirror (LSI raid controller). While performing intensive... (4 Replies)
Discussion started by: s ladd
4 Replies
7. Solaris
Hi
We have an M3000 single physical processor and 8gb of memory running Solaris 10. This system runs two Oracle Databases one on Oracle 9i and One on Oracle 10g.
As soon as the Oracle 10g database starts we see an immediate drop in system performance, for example opening an ssh session can... (6 Replies)
Discussion started by: gregsih
6 Replies
8. AIX
Hi Everyone,
I have been struggling for few days with iSCSI and thought I could get some help on the forum...
fresh install of AIX7.1 TL4 on Power 710, The rootvg relies on 3 SAS disks in RAID 0, 32GB Memory
The lpar Profile is using all of the managed system's resources.
I have connected... (11 Replies)
Discussion started by: frenchy59
11 Replies
9. Windows & DOS: Issues & Discussions
Just a quick note for macOS users.
I just installed (and removed) Parallels Desktop 15 Edition on my MacPro (2013) with 64GB memory and 12-cores, which is running the latest version of macOS Catalina as of this post. The reason for this install was to test some RIGOL test gear software which... (6 Replies)
Discussion started by: Neo
6 Replies
LEARN ABOUT CENTOS
pmsignal
PMSIGNAL(1) General Commands Manual PMSIGNAL(1)
NAME
pmsignal - send a signal to one or more processes
SYNOPSIS
$PCP_BINADM_DIR/pmsignal [-a|-l] [-n] [-s signal] [PID ...|name ...]
DESCRIPTION
pmsignal provides a cross-platform event signalling mechanism for use with tools from the Performance Co-Pilot toolkit. It can be used to
send a named signal (only HUP, USR1, TERM, and KILL are accepted). to one or more processes. The processes are specified using PID or the
binary name (with -a option).
If a signal is not specified, then the TERM signal will be sent.
On Linux and UNIX platforms, pmsignal is a simple wrapper around the kill(1) command. On Windows, the is no direct equivalent to this
mechanism, and so an alternate mechanism has been implemented - this is only honoured by PCP tools, however, not all Windows utilities.
PCP ENVIRONMENT
Environment variables with the prefix PCP_ are used to parameterize the file and directory names used by PCP. On each installation, the
file /etc/pcp.conf contains the local values for these variables. The $PCP_CONF variable may be used to specify an alternative configura-
tion file, as described in pcp.conf(5).
SEE ALSO
kill(1), killall(1), pcp.conf(5) and pcp.env(5).
Performance Co-Pilot PCP PMSIGNAL(1)