PHYS_MEMSIZE Parameter ...

[former_member309601]

Hi, I have an SAP ERP 6.0 server with: 8 GB RAM, Oracle, Win 2003 64 bits, my problem is some process need more memory and my server has too much swapping. When I check PHYS_MEMSIZE parameter its 1024, when I believe it must be total RAM size (8000). My swapping is 16GB.

I have read 88416, 1518419 notes, but they do not explain how can I change PHYS_MEMSIZE or which setting can I use with it. These notes explain that PHYS_MEMSIZE may be not defined and it will take total memory server. I have checked in another servers SAP with SQL Server, and fine, PHYS_MEMSIZE has total RAM, but with my server with Oracle when I try to change this parameter, my server does not star-up ..... If I deleted , my server does not start-up.

I need change PHYS_MEMSIZE to total RAM memory size.

Regards.

[Former Member]

hi

For a ABAP system, the default value is the entire RAM or swap space.

Reserve some RAM for the database instance. As a rule of thumb, SAP/DB

= 70/30 is valid. Be sure to reserve at least the minimum values required for

the instance, which is at least 512 MB for a non-Unicode SAP system and at

least 1 GB for a Unicode SAP system.

For a ABAP+JAVA system, the default value is the entire RAM or swap

space. Reserve some RAM for the database instance. As a rule of thumb,

SAP/DB = 70/30 is valid. Be sure to reserve at least the minimum values

required for the instance, which is at least 768 MB for a non-Unicode SAP

system and at least 1,2 GB for a Unicode SAP system.

The required Paging File Size on Windows:

32-bit: 1 GB plus 3 times RAM. Maximum required is 10 GB.

64-bit: At least 20 GB is recommended for standard installations (for more

information, see SAP Note 153641).

The required swap space on Unix:

32-bit: 3 * RAM, minimum 3 GB

64-bit: At least 20 GB is recommended for standard installations (for more

information, see SAP Note 153641).

i think its needful information for you

thanks and regards,

santosh

[former_member188883]

Hi,

Ideally PHYS_MEMSIZE represents how much memory you can allocate for your sap application.

Singe you have 8 GB RAM, I would propose to change the value of PHYS_MEMSIZE = 4096.

Check swap = 24 GB RAM.

Hope this is useful.

Regards,

Deepak Kori

[former_member189725]

This parameter specifies the amount of main memory to be used by SAP instance . If you have DB and APP running on the same system , then allocate 60% of the value to APP. So set the parameter to 5120 . Once you set this , no manual maintenance of other parameter is required. The SWAP seems to be ok , but make it 20GB if you have space on your disk.

Edited by: Ratnajit Dey on Dec 16, 2011 9:21 AM