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3) SSC/Dhakil Result Bangladesh 2012.

After deleted the files but no space reclaimed in Sun solaris mount point

yes, i have deleted some big files from a mount point in sun
solaris system but i can not get back any space.

#df -h ---command shows 100% used.


solution:-

it have many causes..

1)May be the process that created the file is still running because the blocks aren't freed until no processes are accessing the file so first stop the process or Try to kill the process ( or reboot can solve this). (i have tested it by deleting a oracle listener log file. it does not free space until listener stop.)


2) May be there's another link to the file, which still
exists and is occupying the space.(reboot may solve this)


3)or May be that the space is hidden by Unix's habit of saving
10% of a file system for root. If you get 0% as root then this isn't the case.

TNS-12542: TNS:address already in use TNS-12560 TNS-00512 Linux Error: 98:

Today I change the IP address of my development server (linux redhat 5) with

Root# ifconfig eth0 10.11.201.250 netmask 255.255.255.0 up
Root# ifconfig eth0

And
I change this IP in my /etct/hosts file.

After this when I am trying to start my listener, its says following error…..


[oracle@ebek ~]$ lsnrctl start


Copyright (c) 1991, 2007, Oracle. All rights reserved.

Starting /opt/oracle/product/10.2.0/db_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 10.2.0.4.0 - Production
System parameter file is /opt/oracle/product/10.2.0/db_1/network/admin/listener.ora
Log messages written to /opt/oracle/product/10.2.0/db_1/network/log/listener.log
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=ebek)(PORT=1521)))
Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.11.201.250)(PORT=1521)))
TNS-12542: TNS:address already in use
TNS-12560: TNS:protocol adapter error
TNS-00512: Address already in use
Linux Error: 98: Address already in use

Listener failed to start. See the error message(s) above...


================================================================
Solution:-
================================================================

After that I also change my target Ip and subnet mask in the following files.
And reboot the server. My problem is solved.

Root# vi /etc/sysconfig/network-scripts/ifcfg-eth0

And

Root# vi /etc/sysconfig/network

Auto startup and shutdown oracle database in linux

Auto startup and shutdown oracle database in linux or sun solaris
=================================================================
Down this file
https://www.dropbox.com/s/yrrpy0eta8qmdt3/auto_startup%20database%20in%20linux.txt

1) change a flag ( from N to Y) for auto starup the instance (there may be more than one instance, you should change every instance flag)

In Linux
===========

[ oratab file will create when you run (two script at installation of oracle finishing time) with root user ]

root# vi /etc/oratab

orcl:/d02/oracle/ora102:Y


In sun solaris
===================

root# vi /var/opt/oracle/oratab

orcl:/d02/oracle/ora102:Y


2)

First create(with oracle user) two "start_db" and "stop_db" script
in your $ORACLE_HOME/bin that starts and stop the db.
scripts are below... be careful about copy/paste.try to write it
with your own hand in linux.



-------------------start_db script

#!/bin/bash
# Start the Oracle Database and listeners
su - oracle< lsnrctl start
sqlplus /nolog< connect / as sysdba
startup
EOS
#emctl start dbconsole
#isqlplusctl start
EOO



---------------stop_db script


#!/bin/bash
# Stop the Oracle Database and linteners
su - oracle< lsnrctl stop
sqlplus /nolog< connect / as sysdba
shutdown immediate
EOS
#emctl stop dbconsole
#isqlplusctl stop
EOO



3) (with root user)

add to the /etc/rc3.d/S99local script something like:


#!/bin/sh
# chkconfig: 345 99 10
case "$1" in
'start') su - oracle -c start_db ;;
'stop') su - oracle -c stop_db ;;
esac

or

you can make a script like /etc/init.d/db_start_stop
and give the following permission and association.

chmod 750 /etc/init.d/db_start_stop

chkconfig --add db_start_stop




4) for test your script with root user

-----------------------------
#!/bin/sh
# chkconfig: 345 99 10
case "$1" in
'start') su - oracle -c start_db ;;
'stop') su - oracle -c stop_db ;;
esac
--------------------------------

(note: make a script with above code name in
"/etc/init.d/db_start_stop"


#sh /etc/init.d/db_start_stop start
#sh /etc/init.d/db_start_stop stop


----------------extra---for--me--only----------------------

============================================================================
i was facing "standard in must be a tty" this message when testing to run
these commands
#sh /etc/init.d/db_start_stop start
#sh /etc/init.d/db_start_stop stop

solution:-
I am making change in this script
#!/bin/sh
# chkconfig: 345 99 10
case "$1" in
'start') su - oracle -c start_db ;;---change----su - root -c /oracle_home_details/bin/start_db ;;
'stop') su - oracle -c stop_db ;; ---change----su - root -c /oracle_home_details/bin/stop_db ;;
esac


==========================================================

note : for Associating the db_start_stop service with the appropriate run levels and set it to auto-start using the following command.

chmod 750 /etc/init.d/db_start_stop

chkconfig --add db_start_stop

Heap size K exceeds notification threshold (2048K)

Memory Notification: Library Cache Object loaded into SGA
Heap size 2294K exceeds notification threshold (2048K)
-------------------------------------------------------------
These are warning messages that should not cause the program responsible for these errors to fail. They appear as a result of new event messaging mechanism and memory manager in 10g Release 2.

The meaning is that the process is just spending a lot of time in finding free memory extents during an allocate as the memory may be heavily fragmented. Fragmentation in memory is impossible to eliminate completely, however, continued messages of large allocations in memory indicate there are tuning opportunities on the application.


[ Note:- Set _kgl_large_heap_warning_threshold to a reasonable high value or zero to prevent these warning messages. Value needs to be set in bytes.
The default threshold in 10.2.0.1 is 2MB. So these messages could show up frequently in some application environments.
In 10.2.0.2, the threshold was increased to 50MB after regression tests, so this should be a reasonable and recommended value.
]