SAPPFPAR check output - Help required

[former_member190251]

Hello All,

Please guide me how to calculate the memory/buffer requirements of SAP.

Could  you please explain the below details.

What is Shared memory pools and its uses and also we found

ipc/shm_psize_01                            -10

ipc/shm_psize_02                            -40

ipc/shm_psize_03                            -10

ipc/shm_psize_04                            -10

ipc/shm_psize_06                            -40

ipc/shm_psize_07                            -10

ipc/shm_psize_08                            -10

ipc/shm_psize_09                            -10

ipc/shm_psize_10                            740000000

ipc/shm_psize_19                            -40

ipc/shm_psize_30                            -10

ipc/shm_psize_31                            -10

ipc/shm_psize_33                            -10

ipc/shm_psize_34                            -10

ipc/shm_psize_40                            1554000000

ipc/shm_psize_51                            -10

ipc/shm_psize_52                            -10

ipc/shm_psize_54                            -10

ipc/shm_psize_55                            -10

ipc/shm_psize_57                            -10

ipc/shm_psize_58                            -10

ipc/shm_psize_62                            -10

why some of the shared pool value is negative

what is OS shared memory segments and how they are calculating memory

Nr of operating system shared memory segments: 10

Shared memory resource requirements estimated

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

Total Nr of shared segments required.....:         10

System-imposed number of shared memories.:       1000

Shared memory segment size required min..: 1554000000 (1482.0 MB)

Currently available maximum segment size.: 34359738368 (32768.0 MB)

As per the below details,process means - SM50 work process and how they are calulating minimum ,worst case requirement etc...

Swap space requirements estimated

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

Shared memory....................: 2414.3 MB

..in pool 10  702.6 MB,   99% used

..in pool 40 1478.3 MB,   99% used

..not in pool:  226.5 MB

Processes........................:  649.7 MB

Extended Memory .................: 5120.0 MB

------------------------------------------------

Total, minimum requirement.......: 8184.0 MB

Process local heaps, worst case..: 9536.7 MB

Total, worst case requirement....: 28600.7 MB

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

==   Checking profile:     /sapmnt/SID/profile/SID_DVEBMGS00_server9

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

Maximum shared memory size > 20G

Shared memory disposition overview

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

Shared memory pools

Key:   10  Pool

            Size configured.....:   740000000 ( 705.7 MB)

            Size min. estimated.:   736762358 ( 702.6 MB)

            Advised Size........:   740000000 ( 705.7 MB)

Key:   40  Pool for database buffers

            Size configured.....:  1554000000 (1482.0 MB)

            Size min. estimated.:  1550132276 (1478.3 MB)

            Advised Size........:  1554000000 (1482.0 MB)

Shared memories inside of pool 10

Key:        1  Size:        2500 (   0.0 MB) System administration

Key:        3  Size:   101680000 (  97.0 MB) Disp. communication areas

Key:        4  Size:      531448 (   0.5 MB) statistic area

Key:        7  Size:       14838 (   0.0 MB) Update task administration

Key:        8  Size:    67108964 (  64.0 MB) Paging buffer

Key:        9  Size:   134217828 ( 128.0 MB) Roll buffer

Key:       11  Size:      500000 (   0.5 MB) Factory calender buffer

Key:       12  Size:     6000000 (   5.7 MB) TemSe Char-Code convert Buf.

Key:       13  Size:    60500000 (  57.7 MB) Alert Area

Key:       14  Size:    20000768 (  19.1 MB) Presentation buffer

Key:       16  Size:       22400 (   0.0 MB) Semaphore activity monitoring

Key:       17  Size:     2760892 (   2.6 MB) Roll administration

Key:       30  Size:       51200 (   0.0 MB) Taskhandler runtime admin.

Key:       31  Size:     8412000 (   8.0 MB) Dispatcher request queue

Key:       33  Size:    92160000 (  87.9 MB) Table buffer, part.buffering

Key:       34  Size:    25600000 (  24.4 MB) Enqueue table

Key:       51  Size:    18000000 (  17.2 MB) Extended memory admin.

Key:       52  Size:      180000 (   0.2 MB) Message Server buffer

Key:       54  Size:    61448192 (  58.6 MB) Export/Import buffer

Key:       55  Size:        8192 (   0.0 MB) Spool local printer+joblist

Key:       57  Size:     1572864 (   1.5 MB) Profilparameter in shared mem

Key:       58  Size:        4096 (   0.0 MB) Enqueue ID for reset

Key:       62  Size:    85983232 (  82.0 MB) Memory pipes

Shared memories inside of pool 40

Key:        2  Size:    58556852 (  55.8 MB) Disp. administration tables

Key:        6  Size:   851968000 ( 812.5 MB) ABAP program buffer

Key:       19  Size:   140000000 ( 133.5 MB) Table-buffer

Key:       42  Size:    70592992 (  67.3 MB) DB TTAB buffer

Key:       43  Size:   273654392 ( 261.0 MB) DB FTAB buffer

Key:       44  Size:    48374392 (  46.1 MB) DB IREC buffer

Key:       45  Size:    33014392 (  31.5 MB) DB short nametab buffer

Key:       46  Size:       20480 (   0.0 MB) DB sync table

Key:       47  Size:    20481024 (  19.5 MB) DB CUA buffer

Key:       48  Size:      500000 (   0.5 MB) Number range buffer

Key:       49  Size:     2968344 (   2.8 MB) Spool admin (SpoolWP+DiaWP)

Shared memories outside of pools

Key:       18  Size:     2688100 (   2.6 MB) Paging adminitration

Key:       41  Size:    25010000 (  23.9 MB) DB statistics buffer

Key:       63  Size:      409600 (   0.4 MB) ICMAN shared memory

Key:       64  Size:     4202496 (   4.0 MB) Online Text Repository Buf.

Key:       65  Size:   204808192 ( 195.3 MB) Export/Import Shared Memory

Key:       81  Size:       21760 (   0.0 MB) Security Audit Log

Key:     1002  Size:      400000 (   0.4 MB) Performance monitoring V01.0

Key: 58900100  Size:        4096 (   0.0 MB) SCSA area

Nr of operating system shared memory segments: 10

Shared memory resource requirements estimated

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

Total Nr of shared segments required.....:         10

System-imposed number of shared memories.:       1000

Shared memory segment size required min..: 1554000000 (1482.0 MB)

Currently available maximum segment size.: 34359738368 (32768.0 MB)

Swap space requirements estimated

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

Shared memory....................: 2414.3 MB

..in pool 10  702.6 MB,   99% used

..in pool 40 1478.3 MB,   99% used

..not in pool:  226.5 MB

Processes........................:  649.7 MB

Extended Memory .................: 5120.0 MB

------------------------------------------------

Total, minimum requirement.......: 8184.0 MB

Process local heaps, worst case..: 9536.7 MB

Total, worst case requirement....: 28600.7 MB

Errors detected..................:    0

server9:sidadm 13>

Parameters at SAP level

em/initial_size_MB - 5120

EM/TOTAL_SIZE_MB - 16000

ztta/roll_extension -    3500000000   

abap/heap_area_dia - 6000000000

abap/heap_area_nondia    - 4000000000   

abap/heap_area_total    - 10000000000   

em/address_space_MB    4096

abap/heaplimit    40894464

abap/buffersize- 800000

Regards

Subb

[raquel_gomez]

Hi Subbu,

You can have a look at Note '1137734 - Assignment of memory areas, shared memories, and pools', which describes the assignment of the numbers of the SAP Shared Memories

and their naming.

As explained on the Note size of pools can be set with parameter <ipc/shm_psize_nn = value>,

where:

- value 0 means that the shared memory with the key nn is not in a pool.

- negative value means that the shared memory with the key nn is moved to the pool with the key -value (important: only pools 10 and 40 are allowed).

- positive value is allowed ONLY for pools and indicates their size in bytes. 

Therefore, Shared memories inside of pool 10 are those ones where ipc/shm_psize_nn = -10; and similar with Shared memories inside of pool 40.

Regards,

Raquel

[Reagan]

They are not negative values instead it means that the ones with the value -10 are created in pool 10 and the ones with the value -40 are created in pool 40. When you change the buffer parameters you should consider changing the pool 10 and 40 parameter values based on the sappfpar output as they are part of one of them.