Posts Tagged ‘Unix’
Effect Of Multiple SHMMAX Settings
Last week I saw a warning message at database startup time saying: WARNING: EINVAL creating segment of size 0x000000000f0020xx fix shm parameters in /etc/system or equivalent It is an Oracle 10204 database running on Solaris. Searching MOS for exact meaning for this [Read More]
How To Discover Disk Name When LUN Number is Known (OEL5)
I am creating 11gR2 RAC setup for one of my client. Following Oracle documentation for storage, I opted for Oracle ASM and asked storage team for new physical devices. Storage admin thus provided me with a set of LUNs instead of actual physical device names like [Read More]
Sqlplus connection on AIX taking too long
Recently we faced a performance issue, where in sqlplus connection from application server A (AIX 5.3) to Database server DB (different physical server,10gR2 on AIX 5.3) was taking nearly 1-2 minutes. We did some quick check’s to narrow down the problematic area.i.e [Read More]
Use awk/sed in vi
Thought of sharing some useful info which can help you to do your work faster in vi.You can use awk/sed scripts in vi using following command in vi :%!scriptname Here the scriptname file should have execute privilges for user. I used this to create a useful script which I [Read More]
Connections to DataBase Hang Including “/ as sysdba”
Recently I faced one issue where all the connection to database hung and it was also not possible to login to database using “/ as sysdba”. To get access of sqlplus I used the following syntax: $ sqlplus -prelim / as sysdba With “prelim” option we [Read More]
Scheduling Job through Cron??
In case you came across this link searching for Cron syntax, then you can refer to following link http://www.adminschoice.com/docs/crontab.htm Other’s can continue reading the article …. This was a problem which I faced yesterday. We had a mview refresh which [Read More]
