Memory upgrade

[Former Member]

Dear all

We have one server with the 500GB HDD & 3 Gb Ram

i want to add 1GB more ram in it.

my question is how can my Sap instance will recognise the chnge in ram

will it happen automatically? or should i have to make changes in setting.

[martin_juen2 · Accepted solution]

hi,

your installation will not use the additional memory automatically. depending on your os you have to modify the profile parameters for roll memory, heap memory, ...

regards, martin

[Former Member · Accepted solution]

Thanks Martin,

But which parameter value i have to change please specify

regards

Amol

[Former Member · Accepted solution]

Hi Amol,

If windows then check parameter phys_memsize in instance profile.

Below are few memory related parameters which you would like to check....

em/initial_size_MB

abap/heap_area_dia

abap/heap_area_nondia

abap/heap_area_total

ztta/roll_extension

etc...

Regards,

Pinkle

[martin_juen2 · Accepted solution]

Hi,

i think SAP note 146289 - Parameter Recommendations for 64-Bit SAP Kernel is perfect for your needs. It's written for 64bit Upgrades but there are general informations and links to notes for different operating systems. Look at the linked notes for your os!

regards,

Martin

[Former Member · Accepted solution]

SAP now recommends for ZERO memory management. (refer note: Note 88416 - Zero administration memory management as of 4 Windows)

Only you need to set is PHY_MEMSIZE profile parameter.

Regards,

Rajneesh

[Former Member]

Hello Amol,

The Application picks the RAM information from OS level using OS collector.

You can also see this information using OS07N transaction on SAP GUI which shows the physical memory, Number of CPU and realtime usage of the same.

Regards

Vivek

[sunny_pahuja2]

Hi,

You need to fine tune the parameter accordingly as per increase in RAM.

Thanks

Sunny