To show the current paging space volume, its size along with other information use the ‘lsps’ command: # lsps -a Page Space Physical Volume Volume Group Size %Used Active Auto Type Chksum hd6 hdisk1 rootvg 512MB 2 yes yes lv 0 The paging space may be increased on the fly using the ‘chps’ command. In …
How to Increase paging space logical volume size in AIX ? Read More »
The find utility on linux allows you to pass in a bunch of interesting arguments, including one to execute another command on each file. We’ll use this in order to figure out what files are older than a certain number of days, and then use the rm command to delete them. Command Syntax find /path/to/files* -mtime …
This chapter describes how to tune Oracle Database. It contains the following sections: Importance of Tuning Operating System Tools Tuning Memory Management Tuning Disk I/O Monitoring Disk Performance System Global Area Tuning the Operating System Buffer Cache 1.1 Importance of Tuning Oracle Database is a highly optimizable software product. Frequent tuning optimizes system performance and …
Memory and Paging Disk I/O Issues CPU Scheduling and Process Priorities Oracle Real Application Clusters Information Setting the AIXTHREAD_SCOPE Environment Variable Memory and Paging Memory contention occurs when processes require more memory than is available. To cope with the shortage, the system pages programs and data between memory and disks. Controlling Buffer-Cache Paging Activity Excessive …
Today one user complained, that he is not able to delete files. Most probably this was due to non printable charter in the file name. # cd /oracle # ls -ltr total 7151632 drwxr-xr-x 2 oracle oinstall 256 May 27 2008 lost+found drwxr-xr-x 3 oracle oinstall 256 May 28 2008 app drwxr-xr-x 2 oracle oinstall …
Question Does Virtual Memory Manager (VMM) work with raw logical updates, and if so, how? If raw logical volumes do not use block I/O buffer cache, does sync update raw logical volumes or does VMM? Answer When an application directly accesses a raw logical volume, the VMM is not involved. The VMM is involved when …
The following steps reduce the size of the /var or /tmp file system in all supported releases of AIX Versions 4 and 5. If either file system on your machine is 8192KB in size or smaller, you probably should not reduce it. The default size of the /var file system (on installation) is 4096KB, which …
Lists SSA disks that are currently not being used by either the OS or other applications. Lists what size the disk is and which enclosure and slot the disk is located in. #!/bin/ksh printf “Please wait, this could take a while… nn” for pdisk in `lsdev -Cc pdisk | awk ‘/SSA/{print $1}’`do hdisk=`ssaxlate -l ${pdisk}` …
A few weeks back, a user asked me about running an automated task every other week. Though most of us use cron as needed to run those nice little tasks that clean up core files and evaluate the contents of log files in the middle of the night, running a task every other week or …
This document describes how to boot the system into Service mode (also known as Maintenance mode) to install the machine, restore an operating system backup, or perform maintenance on the rootvg volume group. The information in this document applies to AIX Versions 3.x, 4.x and 5.x. Booting microchannel systems into Service mode Booting PCI-based systems …