used memory WP

[Naor_Shalom]

HI,

I have a few questions regarding memory management in SAP system.

I read about it a lot butI still confused

My question is:

1. How I know how much memory all the WPs is used? (How much memory all the WPtakesfrom the OS)

2. How I know how much memory all the DIA's is used? (How much memory all the DIAtakesfrom the OS)

Idontwantseperateit to extend memory roll areaetc, I want to know percentage of memory all the WP takes from the OS.

I asked it becauseineed to increase the number of DIA in the APO system, but before the change I want to know how much memory the WP and the DIA used now, I want to avoid frommemory problemin the OS afteriincrease the number of DIA.

My server is always around 80% memory used, but I limit the memory used bySAP systemwith the parameter PHYS_MEMSIZE, and Idontthink the SAP takes all the PHYS_MEMSIZE parameter value.

And it'stakeme to the 3 question:

3.howI know how much memory the SAP system takes fromOS? I limit the memory used by SAP with PHYS_MEMSIZE, but I want to know exactly how much memory the SAP takes and if he used all the valueigive in the PHYS_MEMSIZE.

Maybe Idontneed to increase memory in the server just to increase the number of DIA

Thanks for your help my freinds

Naor

[Naor_Shalom]

HI

Buffer             HitRatio %  Alloc. KB Freesp. K

Nametab (NTAB)

  Table definition     99.96     25,211     11,881

  Field definition    100.00    125,861     73,304

  Short NTAB          100.00      6,321      3,222

  Initial records      98.74     37,345     29,911

program                99.92  1,800,000    686,254

CUA                    99.97     13,000      1,179

Screen                 99.98     19,532      1,757

Calendar              100.00        488        316

OTR                   100.00      4,096      3,327

Tables

  Generic Key         100.00    200,000     27,451

  Single record        97.36     40,000     10,857

Export/import          98.46     75,000     10,907

Exp./ Imp. SHM         99.57      4,096      2,178

SAP Memory      Curr.Use % CurUse[KB] MaxUse[KB]

Roll area            1.21      3,175     11,784

Page area            0.45      1,183    262,136

Extended memory      2.72    913,408  6,385,664 

Heap memory                        0  2,244,228

PHYS_MEMSIZE                                25600

total memory - 32 GB

Oracle  - 17 GB

Thanks

naor

[yakcinar]

Hello Naor,

First of all your DB has more than 1/3 of host memory rule value. As I said rule of thumb it should be about 10-12 GB. Check Oracle memory usages also. Does Oracle use all allocated memory?

PHYS_MEMSIZE + DB MEM SIZE = 25 + 17 = 42 GB. Your system must swap at least 10 GB from these values.

What about the swap size of your system? Is it 2-3 times of your host memory?

I will do calculations later. No time now. And reply later.

Regards,

Yuksel AKCINAR

[Naor_Shalom]

HI

46 GB SWAP

Thanks

Naor