How to check if enough memory available for new db on the server

Hi all
I need to add another instance to my server.
How to check if there is enough memory available.

Some information about:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 XLTABP/oravl01/oracle > uname - a
Linux 2.6.18 - 92.el5 #1 SMP indlin045 kills Apr 29 13:16:15 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux

2. There are five instances on this server, four of them on 10 g & 11 g.

3 course Details memory server:
XLTABP/oravl01/oracle > POOL-l

-Limits of shared memory-
maximum number of segments = 4096
Max seg size (KB) = 5242880
total max shared memory (k) = 14354432
size minimum seg (bytes) = 1

-Semaphore limits-
maximum number of arrays = 1024
semaphores per table Max = 512
system of semaphores wide Max = 32768
Max ops by call semop = 200
semaphore value max = 32767

-Messages: limits.
system of queues of wide Max = 16
Max size of the message (bytes) = 8192
by default the maximum size of the queue (bytes) = 16384

4 memory details of the instances
Inst1:
SGA_TARGET = 5500M

Inst2:
shared_pool_size = 400 M
db_cache_size = 300 M
LARGE_POOL_SIZE = 400M
JAVA_POOL_SIZE = 150M

Inst3:
shared_pool_size = 400 M
db_cache_size = 300 M
JAVA_POOL_SIZE = 50 M

Inst4:
shared_pool_size = 900 M
db_cache_size = 300 M
LARGE_POOL_SIZE = 300M
JAVA_POOL_SIZE = 150M


Inst5:
shared_pool_size = 250 M
db_cache_size = 150 M
LARGE_POOL_SIZE = 100M
JAVA_POOL_SIZE = 150M

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

See you soon,.
Malika

Published by: user9131570 on August 2, 2010 04:02

MemFree is absolute free memory space, while Cached is also free but contains data which may be required in a short time, and inactive pages are that can be written as they have not been used for some time.

You should take example from memory during your peak hours, then the average to get an idea.

concerning

Tags: Database

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