Extract datasource consume a large number of memory

[Former Member]

Hi, experts,

I function enhance a datasource, call a function module in exit.

originally, extract data consume a large number of memory, now, call the FM, need more.

use SM66 to monitor, after the FM finish, the memory isnt released, I think it should be released. because all variables is local in the FM.

I want to know why memory isnt released and where memory is consumed

then create memory snapshot before and after call FM via /HMUSA in debug,

then, compare memory snapshot via S_MEMORY_INSPECTOR, but find nothing related to my program

anybody could tell how to solve it and how to use S_MEMORY_INSPECTOR, many tks.

Best regards.

[former_member197561 · Accepted solution]

Hi J.D.,

If you use internal ABAP tables, use explicitly "free".

Basically on

• CLEAR, REFRESH
  The first memory page is kept
  All indexes are dropped

• FREE
  The table body is de-allocated completely
  All indexes are dropped
  The table header is not de-allocated but inserted to a free list

Best regards,

Sylvia

[Former Member · Accepted solution]

Tks Sylvia,

I already clear all variables via FREE command in FM.

Best regards.

[former_member197561 · Accepted solution]

Hi J.D.

In /nSM66 how high is the "Heap Memory" and how high is the "Ext.mem."?

Could you cross check with the data "Memory Used [kb]" displayed in /nSTAD for same request?

Best regards,

Sylvia

[Former Member · Accepted solution]

appreciate Sylvia reply.

as i know, SM66 and STAD can only know total memory consumption,

i want to know after FM release, what object consume the released memory.

Best regards.

[former_member197561 · Accepted solution]

Hi J.D.,

I am a bit confused. Actually you would not be able to see "what object consume the released memory" .. Only objects which are still alive are seen in the Memory Snapshot.

I assume you need something like "allocation trace" to see what is being allocated, before it was released, but I am not aware of such tool for ABAP.

Best regards,

Sylvia

[Former Member · Accepted solution]

Hi Sylvia,

you are right, so, i save memory snapshot via call command /HMUSA in debug before and after call FM.

Then call Tcode S_MEMORY_INSPECTOR to compare them, exceeded memory is displayed in red color.

but to be surprise, all red objects are standard. i cant find out z-object or global internal table related to my datasource, for example C_T_DATA etc.

you or anybody else could give me a demo of using S_MEMORY_INSPECTOR, tks a lot.

i will do a test again.

best regards.

[former_member197561 · Accepted solution]

Hi J. D.,

Unfortunatelly, it will be difficult to give demo.

SAP hopes that the official documentation

http://help.sap.com/saphelp_nw70ehp2/helpdata/en/1f/aa212fe4844f0d8a56196a92938b69/frameset.htm

http://help.sap.com/saphelp_nw70ehp2/helpdata/en/49/243804855616b6e10000000a42189d/content.htm

http://help.sap.com/saphelp_nw70ehp2/helpdata/en/49/255a8a29ac16b7e10000000a42189d/content.htm

would hep you work sucessfully with the Memory Inspector.

Best regards,

Sylvia

[Former Member]

Hi All,

I do a test scenario.http://scn.sap.com/thread/3332325

[Former Member]

Why you decide that memory is not released? Where you check this?

[Former Member]

This message was moderated.

[Former Member]

many tks Sylvia,

I will read these links. then do a more detail test and feedback the result.

Best regards.

J.D

[Former Member]

help pls, tks