Memory settings - ECC and BI SAP systems

[Former Member]

Dear all,

I am currently investigated to know if your ECC 6.0 and BI 7.0 SAP systems have enough memory.

1. ECC 60

SID: P11

CI : 12 GB RAM - SWAP : 34 GB

AS1 : 8 GB RAM - SWAP : 30 GB

AS2 : 8 GB RAM - SWAP : 30 GB

2. BI 70

SID : P33

CI : 12 GB RAM - SWAP : 34 GB

For ECC 60 - P11

==============

1. When I start ST06N transaction, I see that memory on CI is free at 3 GB.

It means that 12 GB - 3 GB = 9 GB RAM are used.

2. I also see that 18 GB are free, which means that 34 GB - 18 GB = 16 GB Swap are used.

My question :

Does it means that we should increase our memory by 16 GB to avoid SWAP ?

In other terms, should we pass from 12 GB RAM to 28 GB (12 GB RAM + 16 GB) ?

I do have the same statistics for BI.

Thanks in advance for your recommandations.

Best regards

CP2009

[JPReyes · Accepted solution]

I don't understand you question... why you want to avoid using SWAP space?...

Regards

Juan

[Former Member · Accepted solution]

Dear Juan,

Thanks for your input.

I do not want to avoid SWAP, even if we know that swapping slows systems.

My question is :

Do we have enough memory (12 GB) or not ?

As far as our system is swappipng 13 GB, I am wondering if 12 GB RAM is sufficient ?

Best regards

CP2009

[JPReyes · Accepted solution]

I do not want to avoid SWAP, even if we know that swapping slows systems

I think you have a concept problem...

one thing is SWAP space...

http://help.sap.com/saphelp_nw04s/helpdata/en/02/9625e3538111d1891b0000e8322f96/frameset.htm

and another one is buffer SWAP

http://help.sap.com/saphelp_nw04s/helpdata/en/c4/3a6f00505211d189550000e829fbbd/frameset.htm

Swap space should be 3 to 4 times the size of the physical memory and its usage should be monitored, and I would not be concerned about its usage. Buffer swaps in the other hands if buffers parameters are not set properly then you can face some performance issues.

Regards

Juan