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Hanh Nguyen
Oct 31, 20151 min read
How to add/remove vdisk to/from Guest LDOMS online
Prerequisites In order to add vdisk online to a guest LDOM, the SMF service svc:/platform/sun4v/drd must be online in Guest LDOM : ldom01...
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Hanh Nguyen
Oct 31, 20155 min read
How to Diagnose Slow TNS Listener / Connection Performance
Questions to ask 1. Is the problem intermittent or happening all the time? 2. When did the problem start to happen and what was changed...
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Hanh Nguyen
Oct 31, 20151 min read
How To Change the Listener Log Filename Without Stopping the Listener
Note for 11g and newer installations: This procedure only works if ADR has been disabled in the listener.ora (addition of...
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Hanh Nguyen
Oct 31, 20152 min read
Tuning SGA_TARGET Using V$SGA_TARGET_ADVICE
What is the view V$SGA_TARGET_ADVICE The V$SGA_TARGET_ADVICE view provides information that helps you decide on a value for SGA_TARGET....
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Hanh Nguyen
Oct 31, 20151 min read
Script To Monitor RDBMS Session UGA and PGA Current And Maximum Usage Over Time
set echo off; set feedback off; set heading off; set linesize 128; set show off; set pagesize 55; set trimspool on; set verify off;...
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Hanh Nguyen
Oct 31, 20153 min read
Script To Monitor Memory Usage By Database Sessions
REM Setting environment variables SET LINESIZE 200 SET PAGESIZE 500 SET FEEDBACK OFF SET VERIFY OFF SET...
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Hanh Nguyen
Oct 31, 201516 min read
Memory – Tuning the Shared Pool and Tuning Library Cache Latch Contention
Troubleshooting Steps What is the shared pool ? Oracle keeps SQL statements, packages, object information and many other items in an area...
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Hanh Nguyen
Oct 30, 20151 min read
AIX- 20.9 0503-903 CHEDITION: EDITION CANNOT BE DETERMINED
# chedition -l <– Shows what you have # chedition -x <– Sets to Express # chedition -s <– Set to Standard
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Hanh Nguyen
Oct 30, 20152 min read
HACMP- HMC COMMAND
Here are some very useful commands for the Hardware Management Console (HMC): Show vital product data, such as the serial number: # lshmc...
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Hanh Nguyen
Oct 30, 20152 min read
AIX- Procedure to replace rootvg harddisk
Procedure of replacing rootvg failed hdisk ================================= 1)Ensure all LV in VG are mirrored. (lsvg -l rootvg) 2)...
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Hanh Nguyen
Oct 30, 20151 min read
AIX – PERMISSION DENIED WITH SCP
Actually, you can fix it without un-mounting /usr or rebooting. Here’s how: mkdir /temproot mount / /temproot chmod a+rx /temproot/usr...
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Hanh Nguyen
Oct 30, 20153 min read
UNIX – RESET ROOT PASSWORD
1.1 How To: Reset Admin/Root Password FreeBSD (all versions) Turn Server off. Hitting the Power Button should start a...
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Hanh Nguyen
Oct 30, 20151 min read
AIX- CLEAR ERROR LOG
To delete all entries from the error log, enter: errclear 0 To delete all entries in the error log classified as software errors, enter:...
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Hanh Nguyen
Oct 30, 20151 min read
HACMP- START/STOP
1.1 Stop/Start resource group by command 1.1.1 STOP cluster /usr/es/sbin/cluster/cspoc/fix_args nop cl_clstop ‘-N’...
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Hanh Nguyen
Oct 30, 20151 min read
HACMP-REMOVE SERVICE IP
(1) remove service IP Cluster Applications and Resources –> Resources –> Configure Service IP Labels/Addresses –> Remove Service IP...
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Hanh Nguyen
Oct 30, 20151 min read
HACMP – Remove resource group
remove resoruce group: bring rg offiline remove from dependency first: smitty -> hacmp> Cluster Applications and Resources->Resource...
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Hanh Nguyen
Oct 30, 20152 min read
HACMP – Create Resource Group
Prepare stop/start script in /Clusterpath, owner should under root smitty hacmp)-> Cluster Applications and Resource-> Resource...
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Hanh Nguyen
Oct 30, 20151 min read
HACMP – Rename LV Name
rename lv name: Set Characteristics of a Logical Volum [Entry Fields] Volume Group Name appvg Resource...
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Hanh Nguyen
Oct 30, 20151 min read
HACMP – ADD NEW HARDDISK TO EXISTING VG
set pvid before add harddisk to VG chdev -l hdisk11 -a pv=yes System Management (C-SPOC)->Storage-> Volume Groups-> Set Characteristics...
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Hanh Nguyen
Oct 30, 20151 min read
ADD NEW FILESYSTEM TO HACMP
HACMP->storage>File Systems-> Add a File System-> Enhanced Journaled File System->jfs2 Resource Group ...
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