Locks aquired for dbremove call in CDS

Hello,
We are using this to remove older database files from a CDS environment.
if ((ret =cds_env->dbremove(cds_env, NULL, db_name, NULL, 0)) != 0) {
goto err;
We see that this aquires a lot of locks in the environment. Each file has approximately 100000 records. Our understanding was that in CDS locks are taken at the database level and not at the page level. We seem to hit the maximum number of locks configured, which is configured as 1000. We do share the environment with other databases but do not expect the dbremove to exhaust the locks.
Using release 5.1.19 on HP-UX Itanium.
Thanks in advance.

Hi,
I'm surprised the DB_ENV->dbremove call is taking out a lot of locks. Have you tried analyzing the output from db_stat?
http://docs.oracle.com/cd/E17076_02/html/api_reference/C/db_stat.html
If you post the output from running db_stat -CA on your environment, I'll try to help.
Regards,
Alex Gorrod
Oracle Berkeley DB

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Hi experts,
I developed a function module to update the confirmations tab of a PO on ME22N screen. Now, I want to have a lock object in the FM so that a user cant make changes while this FM is in use. I do not know if there is any standard lock object for this purpose. I created a lock object in SE11 'EZEKES' since table EKES corresponds to vendor confirmations details. The Enqueue function was called into the program. The code is below:
CALL FUNCTION 'ENQUEUE_EZPHLOCK'
EXPORTING
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EXCEPTIONS
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Code:
""Local Interface:
*" IMPORTING
*"     REFERENCE(PONUMBER) TYPE EKKO-EBELN
*" TABLES
*"      ITAB STRUCTURE UEKES
TABLES: EKES, EKKO.
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DATA: X LIKE EKES-ETENS.
data: i_tab like itab occurs 0 with header line.
move itab[] to i_tab[].
DATA: i_ekes LIKE uekes OCCURS 0 WITH HEADER LINE.
SELECT EBELN FROM EKKO INTO TABLE I_EKKO WHERE EBELN = PONUMBER.
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WHERE EBELN = I_EKKO-EBELN.
ENDIF.
select single etens from ekes into x WHERE EBELN = PONUMBER.
x = x + 1.
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
DATA: VARKEY LIKE RSTABLE-VARKEY.
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    _WAIT                = ' '
    _COLLECT             = ' '
EXCEPTIONS
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    SYSTEM_FAILURE       = 2
    OTHERS               = 3
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
    LOOP AT I_TAB. "WHERE EBELN = PONUMBER.
    READ TABLE I_TAB.
    LOOP AT i_ekes WHERE ebelp EQ ITAB-EBELP "itemnumber
                      AND ebtyp EQ 'LA'.
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      i_ekes-kz   = 'U'.
      i_ekes-eindt = ITAB-EINDT. "deldate.
      I_EKES-XBLNR = ITAB-XBLNR.
      i_ekes-erdat = sy-datum.
      i_ekes-ezeit = sy-uzeit.
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ENDLOOP.
IF sy-subrc NE 0.
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        i_ekes-ebtyp = 'LA'.
        i_ekes-kz   = 'I'.
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CALL FUNCTION 'ME_CONFIRMATION_UPDATE'
    EXPORTING
      I_EBELN = PONUMBER
    TABLES
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        YEKES         = I_EKES[].
IF SY-SUBRC = 0.
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EXPORTING
MODE_RSTABLE       = 'E'
   TABNAME            = EKES.
   VARKEY             = VARKEY
X_TABNAME          = ' '
X_VARKEY           = ' '
_SCOPE             = '3'
_SYNCHRON          = ' '
_COLLECT           = ' '
ENDFUNCTION.

Lock object for table KNVP and KNVK

Hello Friends,
Can you please tell me the standard lock object for the table KNVP and KNVK.
Thank and regards,
Kuldeep

Hi
see this and do accordingly
Lock objects are use in SAP to avoid the inconsistancy at the time of data is being insert/change into database.
SAP Provide three type of Lock objects.
- Read Lock(Shared Locked)
protects read access to an object. The read lock allows other transactions read access but not write access to
the locked area of the table
- Write Lock(exclusive lock)
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http://help.sap.com/saphelp_nw04s/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm
tables:vbak.
call function 'ENQUEUE_EZLOCK3'
exporting
mode_vbak = 'E'
mandt = sy-mandt
vbeln = vbak-vbeln
X_VBELN = ' '
_SCOPE = '2'
_WAIT = ' '
_COLLECT = ' '
EXCEPTIONS
FOREIGN_LOCK = 1
SYSTEM_FAILURE = 2
OTHERS = 3
if sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
endif.
Normally ABAPers will create the Lock objects, because we know when to lock and how to lock and where to lock the Object then after completing our updations we unlock the Objects in the Tables
http://help.sap.com/saphelp_nw04s/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm
purpose: If multiple user try to access a database object, inconsistency may occer. To avoid that inconsistency and to let multiple user give the accessibility of the database objects the locking mechanism is used.
Steps: first we create a loc object in se11 . Suppose for a table mara. It will create two functional module.:
1. enque_lockobject
1. deque_lockobject
before updating any table first we lock the table by calling enque_lockobject fm and then after updating we release the lock by deque_lockobject.
http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm
GO TO SE11
Select the radio button "Lock object"..
Give the name starts with EZ or EY..
Example: EYTEST
Press Create button..
Give the short description..
Example: Lock object for table ZTABLE..
In the tables tab..Give the table name..
Example: ZTABLE
Save and generate..
Your lock object is now created..You can see the LOCK MODULES..
In the menu ..GOTO -> LOCK MODULES..There you can see the ENQUEUE and DEQUEUE function
Lock objects:
http://www.sap-img.com/abap/type-and-uses-of-lock-objects-in-sap.htm
http://help.sap.com/saphelp_nw04s/helpdata/en/cf/21eea5446011d189700000e8322d00/content.htm
Match Code Objects:
http://help.sap.com/saphelp_nw2004s/helpdata/en/41/f6b237fec48c67e10000009b38f8cf/content.htm
http://searchsap.techtarget.com/tip/0,289483,sid21_gci553386,00.html
See this link:
http://www.sap-img.com/abap/type-and-uses-of-lock-objects-in-sap.htm
Check these links -
lock objects
Lock Objects
Lock Objects
Regards
Anji

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Locks aquired for dbremove call in CDS

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