ORACLE Database running slow on AIX ( nmon / topas ) Post: 302480016

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Operating Systems AIX ORACLE Database running slow on AIX ( nmon / topas ) Post 302480016 by ctsgnb on Monday 13th of December 2010 06:53:22 PM

12-13-2010

Registered User

Agree with zxmaus : glad to see our suggestions helped!

By the way, you should (for example)

Code:

set lines 200
set pages 999

before generating spool : the output would be better formatted

Regarding the tip mentionned by zxmaus, you can a lot more by reading the whole chapter A of the link i have posted in #29

A	Administering Oracle Database on AIX
A-1	Memory and Paging
A-1	Controlling Buffer-Cache Paging Activity
A-2	Tuning the AIX File Buffer Cache
A-3	Allocating Sufficient Paging Space
A-3	Controlling Paging
A-4	Setting the Database Block Size
A-4	Tuning the Log Archive Buffers
A-4	I/O Buffers and SQL*Loader
A-5	Disk I/O Issues
A-5	AIX Logical Volume Manager
A-6	Using Journaled File Systems Compared to Raw Logical Volumes
A-8	Using Asynchronous I/O
A-10	I/O Slaves
A-10	Using the DB_FILE_MULTIBLOCK_READ_COUNT Parameter
A-11	Using Write Behind
A-11	Tuning Sequential Read Ahead
A-12	Tuning Disk I/O Pacing
A-12	Resilvering with Oracle Database
A-13	Backing Up Raw Devices
A-13	CPU Scheduling and Process Priorities
A-13	Changing Process Running Time Slice
A-14	Using Processor Binding on SMP Systems
A-14	Setting the AIXTHREAD_SCOPE Environment Variable

Last edited by ctsgnb; 12-13-2010 at 08:38 PM..

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lvscan

LVSCAN(8)						      System Manager's Manual							 LVSCAN(8)

NAME

       lvscan - scan (all disks) for Logical Volumes

SYNOPSIS

       lvscan [-a|--all] [-b|--blockdevice] [-d|--debug] [-h|--help] [--ignorelockingfailure] [-P|--partial] [-v|--verbose]

DESCRIPTION

       lvscan  scans all known volume groups or all supported LVM block devices in the system for defined Logical Volumes.  The output consists of
       one line for each Logical Volume indicating whether or not it is active, a snapshot or origin, the size of the device  and  its	allocation
       policy.	Use lvs(8) or lvdisplay(8) to obtain more-comprehensive information about the Logical Volumes.

OPTIONS

       See lvm(8) for common options.

       --all  Include information in the output about internal Logical Volumes that are components of normally-accessible Logical Volumes, such as
	      mirrors, but which are not independently accessible (e.g. not mountable).  For example, after creating a mirror using  lvcreate  -m1
	      --mirrorlog disk, this option will reveal three internal Logical Volumes, with suffixes mimage_0, mimage_1, and mlog.

       -b, --blockdevice
	      This option is now ignored.  Instead, use lvs(8) or lvdisplay(8) to obtain the device number.

SEE ALSO

       lvm(8), lvcreate(8), lvdisplay(8) lvs(8)

Sistina Software UK				     LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26)						 LVSCAN(8)