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тАО04-25-2004 02:17 AM
тАО04-25-2004 02:17 AM
Oracle instance memory usage .
I have L2000,11i with 3 instances ,
How can i know how much memory each instance is taking ?
Bye .
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тАО04-25-2004 04:46 AM
тАО04-25-2004 04:46 AM
Re: Oracle instance memory usage .
For the SGA,
In SQL*Plus :
SQL> show SGA
Look at the alerte.log of each instance. If you don't know where there are :
SELECT p.value||'/alert_'||d.name||'.log'
FROM V$PARAMETER p, V$DATABASE d
WHERE p.name='background_dump_dest'
/
You can have a look on the shared segment with :
icps -a
For the PGA, the management depend on the version of Oracle that your're using.
In anycase, do NOT trust standard tool to give you the amout of memory used, Oracle use shared memory, shared libraries and the text segment of various executable is also shared.
Read metalink.oracle.com Note:174555.1
Cheers
Nicolas
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тАО04-25-2004 06:38 PM
тАО04-25-2004 06:38 PM
Re: Oracle instance memory usage .
Is it possible to know the usage of instance by glance ,perfiew ?
Bye.
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тАО04-25-2004 09:23 PM
тАО04-25-2004 09:23 PM
Re: Oracle instance memory usage .
ipcs -m
It will show you shared memory segments owned by Oracle.
"Reality is just a point of view." (P. K. D.)
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тАО04-26-2004 03:02 AM
тАО04-26-2004 03:02 AM
Re: Oracle instance memory usage .
on Hp-UX server logged as oracle you can use:
/usr/ccs/bin/size $ORACLE_HOME/bin/oracle|awk '{print $1,$3,$5}'|read Mtext Mdata Mbss
#echo $Mtext $Mdata $Mbss
echo "==============================="
echo " $ORACLE_SID"
echo "==============================="
$ORACLE_HOME/bin/sqlplus -s internal<
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тАО04-27-2004 11:51 PM
тАО04-27-2004 11:51 PM
Re: Oracle instance memory usage .
#!/bin/ksh
#
##########################################################################
#
# USAGE: estOraMemory.sh INSTANCE
# PARAMETER: Oracle Instance SID
# AUTHOR: Satya Sridhar @ HMI : 05/14/2002
#
# DESCRIPTION: Estimating Memory Usage.
# Use this script to estimate the memory usage for a given Oracle instance
#
# TODO:
#
##########################################################################
#
# Check usage
#
if [ ! $# -eq 1 ]; then
echo "`date '+%Y%m%d.%H%M%S'` :: Error: Usage = estOraMemory.sh INSTANCE"
exit
fi
echo $1 | . oraenv
if [ `uname` = AIX ]; then
/usr/ccs/bin/size $ORACLE_HOME/bin/oracle | awk '{print $2,$4,$6}' | read Mtext Mdata Mbss
fi
if [ `uname` = SunOS ]; then
/usr/ccs/bin/size $ORACLE_HOME/bin/oracle | awk '{print $1,$3,$5}' | read Mtext Mdata Mbss
fi
if [ `uname` = HP-UX ]; then
/usr/ccs/bin/size $ORACLE_HOME/bin/oracle | awk '{print $1,$3,$5}' | read Mtext Mdata Mbss
fi
if [ `uname` = Linux ]; then
/usr/bin/size $ORACLE_HOME/bin/oracle | tail -1 | awk '{print $1,$2,$3}' | read Mtext Mdata Mbss
fi
echo ""
echo ""
echo Oracle Text section size: $Mtext
echo ""
echo Oracle Data section size: $Mdata
echo ""
echo "Oracle bss (uninitialized data) section size:" $Mbss
echo ""
$ORACLE_HOME/bin/sqlplus -s internal/ <
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тАО04-28-2004 03:10 AM
тАО04-28-2004 03:10 AM
Re: Oracle instance memory usage .
You have receive some valuable answers. Please take the time to assign points.
Twang, neat script.