About St02

Hi Experts,
Please can any one explain me about this in detail?
Roll Area?
Page Area?
Extended Memory?
Heap Memory?
Appreciate your help in this regards
Jawed

Hi,
Roll and Paging Areas are the locations in memory that hold data necessary to perform user requests. When their area in memory reaches its maximum capacity, their data is written out to disk in the Roll File and Page File.
Page Area - holds profiles of access privileges for all active users. These profiles must be checked by the system before it can perform user requests.
Roll Area - is a working area to process user requests. It operates in much the same manner as the Page Area.
SAP extended memory - is the core of the SAP memory management system. Each SAP work process has a part reserved in its virtual address space for extended memory. A buffer bottleneck if swaps begin to occur and max use of extended memory = current use of memory.
Heap memory - Other processes cannot use private (heap) memory. After releasing the assigned memory, the operating system still considers the (virtual) memory as being occupied by the allocating process.
For more detailed info, please check:
http://help.sap.com/saphelp_nw04/helpdata/en/7a/caa6f3bfdb11d188b30000e83539c3/frameset.htm
Thanks,
George

Similar Messages

Pinging sys in SAP

hi everybody,
i want to ping my Sap server/system in my Network thro' SAP application. . What is the Tcode. how can i do that inside SAP.
Thnx
Siva

Hi Siva
I suggest you to read <b>SAP Memory Management</b>
http://help.sap.com/saphelp_nw2004s/helpdata/en/02/96253c538111d1891b0000e8322f96/frameset.htm
it will explain how memory, swap etc being used in SAP..
Also learn about ST02,SM51 SM66 etc . But this is noting to do with your original question " Pinging sys in SAP "
Thanks
Prince Jose

About extend memory used in ST02

Dear expert
Is there a way to know how extend memory is used in ST02
When system start,no user log on we can see:
SAP Memory      Curr.Use % CurUse[KB] MaxUse[KB]
Extended memory     1.95 122，880 208,800
But we can find ,after user log on,the extend memory wiill increased.
SAP Memory      Curr.Use % CurUse[KB] MaxUse[KB]
Extended memory     54.92 3,452,928 3,768,320
I checked sm04 and stad,no such large amout of memory used.
We can see the problem in Y55.
Is there any way to know how the extend memory is used?
Thank you very much for your help.
Best Regards,
Ellen Wang
Active Global Support - Technology
SAP Asia Pacific(GMT+8)

The value specifies the size of the roll area in bytes.The roll area is one of several memory areas from which the memory
requirements of user programs are satisfied.For technical reasons, approximately the first 250 KB of a user context is always
stored in the roll area, additional data
1) to the limit ztta/roll_first in the roll area, then
2) in extended memory, to the limit ztta/roll_extension    or, if extended memory is exhausted, then
3) in the roll area again, until the roll area is full, then
4) in the heap memory (PRIV mode), to the limit    abap/heap_area_dia or abap/heap_area_total or until    the address space or
the swap space is exhausted.
Tthe case of non-dialog work processes, the sequence 1) 3) 4) 2) applies. After this, terminations occur, with errors such as:
STORAGE_PARAMETERS_WRONG_SET or an error code that indicates a memory bottleneck.
Cheers !
Manish

Too many red entried in st02

Dear Experts,
I have installed sap ecc6 ehp4reday sp1 with db2 9.1 fp9 on hp-ux 11.31 1 x Itanium 1.46Ghz with RAM 16 GB.
the issue is there is too many REDs in st02 tune screen . Kindly suggest me any note matching with the given information or provide me solution .
the st02 summery is as bellow
Buffer Name                    Comment
Profile Parameter             Value      Unit Comment
Program buffer                 PXA
abap/buffersize               300000     kB    Size of program buffer
abap/pxa                      shared           Program buffer mode
CUA buffer                     CUA
rsdb/cua/buffersize           3000       kB    Size of CUA buffer
Screen buffer                  PRES
zcsa/presentation_buffer_area 4400000    Byte Size of screen buffer
sap/bufdir_entries            2000             Max. number of buffered screens
Generic key table buffer       TABL
zcsa/table_buffer_area        30000000   Byte Size of generic key table buffer
zcsa/db_max_buftab            5000             Max. number of buffered objects
Single record table buffer     TABLP
rtbb/buffer_length            10000      kB    Size of single record table buffer
rtbb/max_tables               500              Max. number of buffered tables
Export/import buffer           EIBUF
rsdb/obj/buffersize           4096       kB    Size of export/import buffer
rsdb/obj/max_objects          2000             Max. number of objects in the buffer
rsdb/obj/large_object_size    8192       Bytes Estimation for the size of the largest object
rsdb/obj/mutex_n              0                Number of mutexes in Export/Import buffer
OTR buffer                     OTR
rsdb/otr/buffersize_kb        4096       kB    Size of OTR buffer
rsdb/otr/max_objects          2000             Max. number of objects in the buffer
rsdb/otr/mutex_n              0                Number of mutexes in OTR buffer
Exp/Imp SHM buffer             ESM
rsdb/esm/buffersize_kb        4096       kB    Size of exp/imp SHM buffer
rsdb/esm/max_objects          2000             Max. number of objects in the buffer
rsdb/esm/large_object_size    8192       Bytes Estimation for the size of the largest object
rsdb/esm/mutex_n              0                Number of mutexes in Exp/Imp SHM buffer
Table definition buffer        TTAB
rsdb/ntab/entrycount          20000            Max. number of table definitions buffered
The size of the TTAB is nearly 100 bytes * rsdb/ntab/entrycount
Field description buffer       FTAB
rsdb/ntab/ftabsize            30000      kB    Size of field description buffer
rsdb/ntab/entrycount          20000            Max. number / 2 of table descriptions buf
FTAB needs about 700 bytes per used entry
Initial record buffer          IRBD
rsdb/ntab/irbdsize            6000       kB    Size of initial record buffer
rsdb/ntab/entrycount          20000            Max. number / 2 of initial records buffer
IRBD needs about 300 bytes per used entry
Short nametab (NTAB)           SNTAB
rsdb/ntab/sntabsize           3000       kB    Size of short nametab
rsdb/ntab/entrycount          20000            Max. number / 2 of entries buffered
Calendar buffer                CALE
zcsa/calendar_area            500000     Byte Size of calendar buffer
zcsa/calendar_ids             200              Max. number of directory entries
Roll, extended and heap memory EXTM
ztta/roll_area                3000000    Byte Roll area per workprocess (total)
ztta/roll_first               1          Byte First amount of roll area used in a dialog WP
ztta/short_area               3200000    Byte Short area per workprocess
rdisp/ROLL_SHM                16384      8 kB Part of roll file in shared memory
rdisp/PG_SHM                  8192       8 kB Part of paging file in shared memory
rdisp/PG_LOCAL                150        8 kB Paging buffer per workprocess
em/initial_size_MB            4092       MB    Initial size of extended memory
em/blocksize_KB               4096       kB    Size of one extended memory block
em/address_space_MB           4092       MB    Address space reserved for ext. mem. (NT only
ztta/roll_extension           2000000000 Byte Max. extended mem. per session (external mode
abap/heap_area_dia            2000000000 Byte Max. heap memory for dialog workprocesses
abap/heap_area_nondia         2000000000 Byte Max. heap memory for non-dialog workprocesses
abap/heap_area_total          2000000000 Byte Max. usable heap memory
abap/heaplimit                40000000   Byte Workprocess restart limit of heap memory
abap/use_paging               0                Paging for flat tables used (1) or not (0)
Statistic parameters
rsdb/staton                   1                Statistic turned on (1) or off (0)
rsdb/stattime                 0                Times for statistic turned on (1) or off (0)
thanks
sadiq

Hello Sadiq,
I agree with the previous post, I'm afraid there is no quick fix for this, especially since we cannot see all of these red entries.
If your errors are purely in memory management on SAP side, you should consider posting in the CST "memory management" part of this forum
Advise from a DB2 perspective is to make sure that all memory specific setting are correct as per note:
899322    DB6: DB2 9.1 Standard Parameter Settings
After setting these parmeters and carrying out further fine tuning yourself, you should consider scheduling an early watch session from SAP.
Best of luck,
Paul
Edited by: Paul Murtagh on Apr 14, 2011 4:50 PM

ST02 Export / Import buffer and directory entries

What would cause the number of (Export / Import) directory entries to steadily increase in ST02 until there were none left. I currently have the directory size set to 30,000 and over the course of about 7 days they are all used up and then I have extensive swaps. The swaps are at 1,060,431 after about one month.

lots of data input through interfaces for example...if the values are too small you have to increase them and checek again until the value is sufficient...
GreetZ, AH

St02 - Swaps in Red( Common but complicated)

Hello Friends,
I am using SAP Netweaver 2004s, SAP_BASIS - 700, OS - Windows NT 6.1, DB- MSSQL 8.00.194.
In Tcode- ST02 i found many red alers while swapping. however many entires have hit ratio of 99% hopefully this can be ignored. please correct me if i am wrong. but 2 entries have less hit ratio the details are given below
Initial records   62.77    12,625     10,894      90.78     5,000      1,076      21.52    3,506       7,430
Initial record buffer IRBD
rsdb/ntab/irbdsize   12000 kB   Size of initial record buffer
rsdb/ntab/entrycount 20000      Max. number / 2 of initial records buffered
Single record   73.95    20,000      4,494      22.63       500        375      75.00   1,033 , 824,053
Single record table buffer TABLP
rtbb/buffer_length 20000 kB   Size of single record table buffer
rtbb/max_tables    500        Max. number of buffered tables
My Question is on what basis i can change this parameters? should i increase or decrease the parameter? how to find out exact digit of the profile parameters?
Thanks,
Shwetha

Hi Shwetha,
The number of swaps you get per day is more relevant than the total number in ST02,
which is the swaps since the last system start.
Double click each line and then click the history button to see how many you get per day
The swap values you have don't seem that large if the machine has been up a few days.
You could try adding more to the single record buffer - perhaps double it.
We have always had a low hit rate in all our systems for the initial record buffer.
I have given up worrying about it.
Tony
Edited by: Tony Morrissey on Jul 8, 2010 1:58 PM

Reg:Swaps in ST02

Hi Gurus,
I have been seeing lot of swaps occuring in ST02,in one our production servers.
I could see the swaps occuring on CUA buffers in huge volumes
Can any body give me any clue on how to go about it,interms of analysing the swaps and fixing the same
Your help would highly be appriciated
Thanks in advance
Rgds-
Venu

hello
you will find some help here : [Online help about buffers|http://help.sap.com/erp2005_ehp_04/helpdata/EN/c4/3a6e98505211d189550000e829fbbd/frameset.htm]
"When a buffer has insufficient freespace or free directories, it has to swap objects out of the buffer in order to load a new object. The column Swap shows how many objects have been swapped out since system startup."
This means that you have to increase the size of the buffer to avoid swapping.
To find the relevant parameter (in RZ10) for a specific buffer => transaction ST02, double click on the buffer and then click on the button "Current parameters". Here is/are the parameter(s) to increase (be careful of some parameters ... your system can crash or not restart !)
After saving & activating the profile in RZ10, perform at os level the command (under <sid>adm) : sappfpar check to fix the memory problems.
Hope this will help you

About user sapsys

Dear expert,
I read some message about user sapsys. However, i still could not understand the concept or running mechanism.
please give me a clear explanation. where can i find this user ? why was there such user sapsys in sm50?.
thank you very much.

HI,
Sapsys is used for internal purpose in SAP server and is not harmful. But if it increases it can be logged off as well. But in many cases sapsys is used for OS jobs, CCMS monitoring hence it may impact if not handled carefully
SAPSYS is a group. It's used for DEV - QA - PRD to share files (especially /usr/sap/trans), for <SID>adm and ora<SID> to talk to each other and share files also.
SAPSYS is a user group name in sap os .SAPSYS is an internal communication user, which access the tables from the dictionary and give access to the users.
Check in SM21 and ST02,
Thanks
Ramakrishna.

ST02(performance tuning)

Hi friends,
For the performance tuning I have put Tcode ST02 where in the below was shown in Red, Pls guide me how to proceed further
                                          swaps
file description                   7945(Red)
Initial records                   11996(Red)
program                           37372(Red)
CUA                                17156(Red)
screen                               2273(Red)
Generic Key                       59(Red)
single record                       19(Red)
export/import                    26539(Red)
Pls clearly guide me how to proceed further....
Thanks in Advance
Yedhiri

Dear Venu,
<removed_by_moderator>
Read the [Rules of Engagement|https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/rulesofEngagement]
Do not ask for points - This forum should be firstly about information exchange; points are an incentive and a way of saying thanks.
Asking for points is like asking someone to say "thank you": The only time we do this in real life is when teaching a child good manners. Saying it to an adult is insulting, so why do it in the forums? If someone keeps asking questions without awarding points, simply stop answering them or use the abuse button to report it.
Regards,
Ashutosh
Edited by: Juan Reyes on Jul 17, 2008 12:13 PM

ST02 - How to check

Can anyone tell me about how to use the transaction code ST02.
And what is all these details below. What is all these buffer below. What is intial record, Export/import, Program/ Buffer Free Space / Program / Single Record/
Help me telling me what all these all about . WHY and WHAT we need to check for this.
Buffer Hit Ratio < 98%
Initial records
Export/import
Exp./Imp. SHM
Program
Buffer Free Space < 5%
Program---
Single Record u2013

Hi
Refer to http://help.sap.com/saphelp_erp60_sp/helpdata/EN/c4/3a6e98505211d189550000e829fbbd/frameset.htm
for full information on SAP buffers
Also I would suggest please do some search on google and market place for these topics before posting
everything is available on net
Rohit

Adobe Bridge in Photoshop - How to install Bridge and camera raw? And what is it all about?

Hi everyone! I am actually in love with this adobe photoshop. I used PSCS2 before, but later on upgraded to CS4. But I feel tired in upgrading to CS5.
One time, I found a tutorial in youtube about camera raw, and would really want to use it. But I was wondering how to install the camera raw. I believe camera raw is a plugin? so I downloaded the plugin here, installed it in my PS. I downloaded a file Camera Raw.8bi and paste it on my C drive - C:\Program Files\Adobe\Photoshop CS4\Plug-ins\File Formats.
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My question is, do you still need adobe bridge installed in order to use camera raw?
If yes, how does it work? How am I suppose to open camera raw?
If no, how am I going to open camera raw without bridge?
And also, where will I download adobe bridge? I cannot find one here for CS4, only adobe bridge for CS5. I am wondering, is it okay to install adobe bridge CS5 and use it with my PS CS4?
I badly need help!

WebDAV (Web-based Distributed Authoring and Versioning) is a set of extensions to HTTP/1.1.
The main difference from FTP as far as I can see is that it allows you to edit documents on a remote web server.
WebDAV was used by the Apple server - MobileMe but is not generally supported by hosting services.
Using WebDAV you can mount a directory locally. This was how iDisk worked on your Mac and you could drag files onto it to upload them to the remote directory.
With WebDAV, a number of users can share a directory which is why its used in local networks but presents security problems when using a remote server.
If you are into file sharing rather than publishing, Dropbox or its new rival SugarSync are more appropriate.

A few days ago i bought the macbook pro in a Providence. In late Summer i will come back to my Country - Ukraine. I would like to know about a tax for my laptop. Can i return tax? Through the TAX FREE or return in airport? What should i do?

A few days ago i bought the macbook pro in a Providence. In late Summer i will come back to my Country - Ukraine. I would like to know about a tax for my
laptop. Can i return tax? Through the TAX FREE or return in airport? What should i do?

You need to talk with the tax authorities in the countries to which you traveled and that of your home country. We are all end-users liek you and not Apple agents.

I am trying to use itunes, it will not open at all, have uninstalled and downloaded new software and 64bit for windows. i have an old ipod nano from about 5 years ago. anything i can do, even to view my purchases and watch/listen to music etc?

ok i have a advent roma laptop with window 7. my itunes used to work fine, completely. every time i plugged in my ipod it was ok. recently my ipod was not working so i never bothered with itunes, however i have movies/tv prog that i purchased and would like to view them. i have an ipod nano from about 5 years ago, the problem with thet is, it switches on, but the circular control panel does nothing, all you can do is lock and unlock it - nothing else.
i tried to download new version of itunes, then uninstalled my origonal version, incase it was corrupted etc, i then again tried to down load new version and also version that is windows 64bit. still when i select the downlaod to open as son as it is finnished nothing happens. and now my desktop shortcut has dissapeared. before when it was there, id double click it, nothing, right click to open it, nothing.
im not the best technically minded but i just dont see what im doing wrong here, please help

Perhaps it would be helpful for you to view the page source code of this page
http://www.alanwork.com/
As you can see, the submenu code links are immediately below the top level code, and are
wrapped in their own <UL> </UL> tag pairs.
Hope that helps

Vendor payments and debts about an asset

Dear sap colleages
I need to know these information about an ASSET:
Purchased orders,
Items from purchase orders,
which of these items i've received, i've paid (also date), i've not paid ( amount of debt related to asset)
payments in advanced (date),
wich of these payments have been cleared (clearing date) and wich not,
who is the vendor,
other expenses (such as delivery)
the amount of taxes,
invoices related and NOT RELATED TO purchase order
payments without invoice
Which transactions do i need to follow?
or
Which document flow?
or
Which tables? Wich keys?
or
Is there a standard report that can give me such information?
Any documentation and/or code will be appreciated.
I need to program a report to integrate all these information.
Thanks and Kind Regards

Hi,
Refer to T.code AW01N - Asset Explorer .
Additionally you cna also refer to SAP Standard reports in Asset Accounting
Accounting - Financial Accounting - Fixed Assets - Information System - Reports on Asset Accounting
Please let me know if you need more information.
Assign points if useful.
Regards
Sridhar M

I cannot receive email properly now. When I open mail, it says that is downloading about 1,700 emails. At the very end, it gives me my newest ones. But this takes a long time. I've contacted the Internet service provider and verified all the right setting

I cannot receive email properly on either my IPad or my IPhone. I have had them for over a year and they have always worked fine. Until three days ago, when they both started acting up. On the IPad, when I open mail, it says it is downloading about 1,700 emails. At the very end, which takes quite a while to get to, I finally get the most recent ones. The IPad is sending emails just fine.
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I have already deleted the email accounts on both devices and reinstalled them. I've contacted the Internet service provider and verified all the right settings. The Outlook email on my desktop is working perfectly.

WMV is a heavily-compressed format/CODEC, and the processing time will depend on several factors:
Your CPU, which is not that powerful in your case
Your I/O sub-system, which is likely a single HDD on your laptop
The source footage. What is your source footage?
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Good luck,
Hunt

About St02

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