PXA_NO_SHARED_MEMORY

[Former Member]

Hello everybody....I am a newbie into this Basis thing, and i have been playin around in SAP, but now i have this issue on our productive server...

Our system is running normally, but.....when some users are runnig huge reports the server just collapses.....and when I look into TX-ST22 I see some errors refering to PXA_NO_SHARED_MEMORY....

I have read in the detail error and I saw that the ABAP program tried to run, but needed 300000KB of memory...then below I also saw that the current is 287, something....so it does not match the 300000that are required by the ABAP Program...so i guess this is the main cause of the NO_PXA error....

by the way I am running Windows 2003 x64, 16 GB PHYS_MEM, and a 65GB page file...

around 25 WP on SAP, don't know what else you need to know in order to have a better idea on how to help out...

thanks in advance...

[Former Member · Accepted solution]

Do check if there is not enough contiguous address space to create the buffer of size required MB

Make sure that the system can start properly. Generally, the size

of the PXA area (profile parameter abap/buffer size) will be too large

for your system

1569318 - ST22 DUMP PXA_NO_SHARED_MEMORY

Read SAP note 307976 for information about this dump type PXA_NO_SHARED_MEMORY.

-Naveen

[Former Member]

HI,

Same problem is addressed in thread http://forums.sdn.sap.com/thread.jspa?threadID=1354115.

Increasing abap/buffersize should resolve your issue.

Regards,

Ashutosh

[Former Member]

is the abap/buffersize the same as the ABAP Program in the buffer and work process part in the basic administration option within the RZ10 ??

If so, right now is set to 300000 KB i tried to increase it to 310000 KB and this was the result:

SAP service didn't started after i rebooted the server in order the changes take effect..i had to modify the profile files from notepad back to normal...

how is this parameter modified??

I mean how much can I increase, is there any kind of grow pattern or formula to know the size I can grow??

[Former Member]

Yes, that is the parameter.

In this case, I guess you need to use SAPPFPAR command from your EXE or NTAMD64 to check your memory parameter values and adjust the values as recommended by the tool.

Refer to below link on how to use it (You can also search in google or SAP Website on more information on this tool)

http://mysapbasis.wordpress.com/2009/09/17/analysing-memory-using-sappfpar-command-in-sap/

http://basishowto.blogspot.com/2011/07/sappfpar-tools-to-check-sap-server.html

Refer to the note and adjust the parameters if server is Windows -

88416 Zero administration memory management for the ABAP server

918475 Correction for shared memory calculation (Windows and Linux)

Thanks,

Arjun

[Former Member]

I just ran SAPPFPAR and got this results:

S:\usr\sap\PRD\DVEBMGS00\exe>sappfpar check pf=PRD_DVEBMGS00_sftcr-s01prd

sappfpar=>sapparam(2): fopenU("PRD_DVEBMGS00_sftcr-s01prd","r"): No such file or

directory

sappfpar=>No Profile used.

sappfpar=>sapparam: SAPSYSTEMNAME neither in Profile nor in Commandline

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

== Checking profile: <no_profile>

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

Shared memory disposition overview

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

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

Key: 2 Size: 6108332 ( 5.8 MB) Disp. administration tables

Key: 3 Size: 13714400 ( 13.1 MB) Disp. communication areas

Key: 4 Size: 503248 ( 0.5 MB) statistic area

Key: 5 Size: 4096 ( 0.0 MB) SCSA area

Key: 6 Size: 319488000 ( 304.7 MB) ABAP program buffer

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

Key: 8 Size: 134217828 ( 128.0 MB) Paging buffer

Key: 9 Size: 268435556 ( 256.0 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: 4400000 ( 4.2 MB) Presentation buffer

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

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

Key: 18 Size: 917604 ( 0.9 MB) Paging adminitration

Key: 19 Size: 30000000 ( 28.6 MB) Table-buffer

Key: 30 Size: 3072 ( 0.0 MB) Taskhandler runtime admin.

Key: 31 Size: 1806000 ( 1.7 MB) Dispatcher request queue

Key: 33 Size: 10240000 ( 9.8 MB) Table buffer, part.buffering

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

Key: 42 Size: 7232992 ( 6.9 MB) DB TTAB buffer

Key: 43 Size: 32534392 ( 31.0 MB) DB FTAB buffer

Key: 44 Size: 7958392 ( 7.6 MB) DB IREC buffer

Key: 45 Size: 4886392 ( 4.7 MB) DB short nametab buffer

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

Key: 47 Size: 3073024 ( 2.9 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)

Key: 51 Size: 3200000 ( 3.1 MB) Extended memory admin.

Key: 52 Size: 40000 ( 0.0 MB) Message Server buffer

Key: 54 Size: 4202496 ( 4.0 MB) Export/Import buffer

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

Key: 57 Size: 1048576 ( 1.0 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

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

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

Key: 65 Size: 4202496 ( 4.0 MB) Export/Import Shared Memory

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

Nr of operating system shared memory segments: 40

Shared memory resource requirements estimated

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

Total Nr of shared segments required.....: 40

Shared memory segment size required min..: 319488000 ( 304.7 MB)

Swap space requirements estimated

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

Shared memory....................: 999.0 MB

Processes........................: 29.0 MB

Extended Memory .................: 4096.0 MB

----

---

Total, minimum requirement.......: 5124.0 MB

Process local heaps, worst case..: 16383.0 MB

Total, worst case requirement....: 21507.0 MB

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

Warnings detected................: 0

as far as I understood looks like my system is well configured, although i have that PXA error from time to time, maybe I misunderstood, if so , please correct me.

thanks in advance.

[Former Member]

Sorry to say, Thats wrong ! You should execute like below

S:\usr\sap\PRD\DVEBMGS00\exe>sappfpar check pf=S:\usr\sap\PRD\SYS\profile\PRD_DVEBMGS00_sftcr-s01prd

Refer to above links on how to execute the command and how to tune the results based on the result.

Thanks,

Arjun

[Former Member]

I ran it the right way and still no error, but one warning...heres the run

this gw host..I located it in Austria, I guess this is for licensing or something like that...

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

== Checking profile: s:\usr\sap\PRD\SYS\profile\PRD_DVEBMGS00_sftcr-s02prd

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

WARNING: Unexpected parameter: gw/alternative_hostnames =213.150.251.111

Shared memory disposition overview

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

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

Key: 2 Size: 6148628 ( 5.9 MB) Disp. administration tables

Key: 3 Size: 13714400 ( 13.1 MB) Disp. communication areas

Key: 4 Size: 517048 ( 0.5 MB) statistic area

Key: 5 Size: 4096 ( 0.0 MB) SCSA area

Key: 6 Size: 319488000 ( 304.7 MB) ABAP program buffer

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

Key: 8 Size: 134217828 ( 128.0 MB) Paging buffer

Key: 9 Size: 268435556 ( 256.0 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: 4400000 ( 4.2 MB) Presentation buffer

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

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

Key: 18 Size: 917604 ( 0.9 MB) Paging adminitration

Key: 19 Size: 30000000 ( 28.6 MB) Table-buffer

Key: 30 Size: 26624 ( 0.0 MB) Taskhandler runtime admin.

Key: 31 Size: 4806000 ( 4.6 MB) Dispatcher request queue

Key: 33 Size: 10240000 ( 9.8 MB) Table buffer, part.buffering

Key: 34 Size: 4194304 ( 4.0 MB) Enqueue table

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

Key: 42 Size: 7232992 ( 6.9 MB) DB TTAB buffer

Key: 43 Size: 32534392 ( 31.0 MB) DB FTAB buffer

Key: 44 Size: 7958392 ( 7.6 MB) DB IREC buffer

Key: 45 Size: 4886392 ( 4.7 MB) DB short nametab buffer

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

Key: 47 Size: 3073024 ( 2.9 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)

Key: 51 Size: 3200000 ( 3.1 MB) Extended memory admin.

Key: 52 Size: 40000 ( 0.0 MB) Message Server buffer

Key: 54 Size: 4202496 ( 4.0 MB) Export/Import buffer

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

Key: 57 Size: 1048576 ( 1.0 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

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

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

Key: 65 Size: 4202496 ( 4.0 MB) Export/Import Shared Memory

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

Nr of operating system shared memory segments: 41

Shared memory resource requirements estimated

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

Total Nr of shared segments required.....: 41

Shared memory segment size required min..: 319488000 ( 304.7 MB)

Swap space requirements estimated

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

Shared memory....................: 1005.9 MB

Processes........................: 336.1 MB

Extended Memory .................: 4096.0 MB

----

---

Total, minimum requirement.......: 5438.1 MB

Process local heaps, worst case..: 1907.3 MB

Total, worst case requirement....: 7345.4 MB

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

Warnings detected................: 1

[Former Member]

Hi Jesus,

Increase your abap/buffersize to around 600000 or more.

If you are using Zero Administration Memory Management then only keep ztta/roll_area & ztta/short_area parameters in profile and delete all other parameters related to memory.

Award points if useful.

Thanks,

Ravi

[former_member204080]

Hi,

Increase the size of abap/buffersize that should be sufficient

[Former Member]

Hi,

You have to tune your ABAP parameters to avoid memory related issues.

Check your ABAP/BUFFERSIZE and em/max_size_MB value

Check this note :- Note 307976 - PXA_NO_SHARED_MEMORY, Note 146289 - Parameter Recommendations for 64-Bit SAP Kernel

Also, you can run SAPPFPAR pf=\usr\sap\SID\SYS\profile for memory values,

check this link http://forums.sdn.sap.com/thread.jspa?threadID=1954394