Shared Memory Limitations

[Former Member]

Hello all,

Can anyone explain to me what are the limitations of shared memory? I want to know the size limitations, how SAP is affected when there are a lot of shared memory areas or few shared memory areas which occupy huge space.

[Clemenss]

Hi Abishek,

this may need in-depth knowledge of your systems architecture and usage. The shared memory pools may be adjusted using [profile parameters|http://help.sap.com/erp2005_ehp_04/helpdata/EN/c4/3a6f41505211d189550000e829fbbd/frameset.htm].

Regards,

Clemens

[Former Member]

Thank you, that throws some light on memory limits. But I want to know what happens when you have huge number of shared memory areas occupying large amounts of memory. Will it make SAP more sluggish (something which windows XP does when you open a lot of windows )?

[MarcinPciak]

I don't think the resources are granted in such way that your Application Server would slow down. This is set by admin and as long as the memory size is resonably assigned there should be no such issues. However, once you reach max size anticipated for use you might either not be able to write anything else or result with some runtime error. Not sure, never tested it that way but for sure you will have to maintain it manually to use it furhter.

Refer SHMA documentation it should explain the behaviour in such cases.

Regards

Marcin

[Former Member]

That's helpful. Thank you.