What is "DBMS_LOCK_ALLOCATED" dictionary view??

Hi, all.
I have a 2 node RAC database(10.2.0.2.0) on windows 2003 EE SP1.
I was monitoring Enterprise Manager, and found overhead in the following SQL
"SELECT LOCKID FROM DBMS_LOCK_ALLOCATED WHERE NAME = :B1 FOR UPDATE".
The above is recurrsive sql, not application sql.
The followings are "wait events" about the above sql.
-->gc current request
-->gc buffer busy
-->gc current retry
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/statviews_4190.htm#sthref2793
What is DBMS_LOCK_ALLOCATED for??
Does Oracle background process update "DBMS_LOCK_ALLOCATED" view
whenever getting locks and releasing locks??
select * from dbms_lock_allocated;
NAME LOCKID EXPIRATI
DROP_EM_USER:SYSMAN 1073741824 07-08-06
SERVICE_NAME_RAC1 1073741825 07-08-30
SERVICE_NAME_RAC2 1073741845 07-08-30
ORA$KUPV$MT-SYSTEM.SYS_EXPORT_SCHEMA_01 1073741865 07-08-17
ORA$KUPV$JOB_SERIALIZE 1073741866 07-08-17
ORA$KUPM$SYSTEM$SYS_EXPORT_SCHEMA_01 1073741885 07-08-17
6行が選択されました。
Thanks and Regards.
Message was edited by:
user507290
null
Message was edited by:
user507290

Well an old document but should clarify your doubts...
http://www.csee.umbc.edu/help/oracle8/server.815/a68001/dbms_loc.htm

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Various Data DIctionary VIews

After posting something here a few days back about the myriad views needing to be digested for the Fund.I Exam, I have just gleaned this lot from the Couchman book. No doubt some of the pros out there may well correct me, but this is simple what I have collected from the book, in the last 3 hours. Cheers.
Dictionary Views
Data Dictionary
Which users are in the database password file:
V$PWFILE_USERS
Where values set in the init.ora file can be viewed – all parameters:
V$PARAMETER
Script used to create the objects that comprise the data dictionary:
catalog.sql
To grant a special role to users so they can look at DBA views:
SELECT_CATALOG_ROLE
Information about all database objects in the database:
DBA_OBJECTS
Information about all tables in the database:
DBA_TABLES
Information about all indexes in the database:
DBA_INDEXES
Information about all views (including dictionary views) in the database:
DBA_VIEWS
Information about all sequences in the database:
DBA_SEQUENCES
Information about all users in the database:
DBA_USERS
Information about all constraints in the database:
DBA_CONSTRAINTS
Information about all table columns that have constraints on them:
DBA_CONS_COLUMNS
Information about all columns that have indexes on them in the database:
DBA_IND_COLUMNS
Information about all columns in all the tables in the database:
DBA_TAB_COLUMNS
Information about all the roles in the database:
DBA_ROLES
Information about all object privileges in the database:
DBA_TAB_PRIVS
Information about all system privileges granted to all users in the database:
DBA_SYS_PRIVS
Displays all PL/SQL source code in the database:
DBA_SOURCE
Information about all triggers in the database:
DBA_TRIGGERS
Information about object privileges granted to roles
ROLE_TAB_PRIVS
Information about system privileges granted to roles
ROLE_SYS_PRIVS
Information about roles granted to roles
ROLE_ROLE_PRIVS
Information about all tablespaces in the database:
DBA_TABLESPACES
Information about all profiles in the database:
DBA_PROFILES
For all parameters?
V$PARAMETER
General information about the database mounted to your instance:
V$DATABASE
Most information about the performance of the database is kept here:
V$SYSSTAT
Most information about the performance for individual user sessions is stored here:
V$SESSION , V$SESSTAT
Information about online redo logs (2)
V$LOG, V$LOGFILE
Information about datafiles
V$DATAFILE
Basic information about control files, and the two columns it has:
V$CONTROLFILE. STATUS / NAME
An object you can query to obtain a listing of all data dictionary objects (4)
CATALOG, CAT, DICTIONARY, DICT.
When the control file was created, Sequence Number, most recent SCN:
V$DATABASE
Information stored in different sections of the control file, Sequence Number:
V$CONTROLFILE_RECORD_SECTION
To see the names and locations of all control files in the db? (2)
V$PARAMETER. V$CONTROLFILE
Tablespace and Datafiles
Temporary Segments:
Name, tablespace location, and owner of temporary segments:
DBA_SEGMENTS
Size of temporary tablespaces, current number of extents allocated to sort segments, and sort segment high-water mark information. Space usage allocation for temporary segments:
V$SORT_SEGMENT
Types of sorts that are happening currently on the database
V$SORT_USAGE
To see the username corresponding with the session:
V$SESSION
Information about every datafile in the database associated with a temporary tablespace:
DBA_TEMP_FILES
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V$TEMPFILE
Storage Structures
A summary view, contains all types of segments and their storage parameters, space utilization settings:
DBA_SEGMENTS
Tablespace quotas assigned to users:
DBA_TS_QUOTAS
Segment name, type, owner, total bytes of extent, name of tablespace storing the extent:
DBA_EXTENTS
The location and amount of free space by tablespace name:
DBA_FREE_SPACE
The location of free space in the tablespace that has been coalesced:
DBA_FREE_SPACE_COALESCED
Information about datafiles for every tablespace
DBA_DATAFILES
Performance view for information for datafiles for every tablespace
V$DATAFILE
To see the total amount of space allocated to a table?
DBA_EXTENTS
Table creation timestamp, information about the object ID:
DBA_OBJECTS
High water mark, all storage settings for a table, and statistics collected as part of the analyze (for row migration) operation on that table
DBA_TABLES
Information about every column in every table:
DBA_TAB_COLUMNS
To determine how many columns are marked unused for later removal?
DBA_UNUSED_COL_TABS
To find the number of deleted index entries ?
INDEX_STATS
To determine the columns on a table that have been indexed:
DBA_ID_COLUMNS
The dynamic view to show whether the index is being used in a meaningful way?
V$OBJECT_USAGE
To see whether a constraint exists on a particular column?
DBA_CONS_COLUMNS
To see the constraints associated with a particular table:
DBA_CONSTRAINTS
To find the username, ID number, (encrypted) password, default and temporary tablespace information, user profile of a user, password expiry date:
DBA_USERS
To all objects, which objects belong to which users, how many objects a user has created?
DBA_OBJECTS
Resource-usage parameters for a particular profile:
DBA_PROFILES
Identifies all resources in the database and their corresponding cost:
RESOURCE_COST
Identifies system resource limits for individual users:
USER_RESOURCE_LIMITS
Shows all system privileges:
DBA_SYS_PRIVS
Show all object privileges:
DBA_TAB_PRIVS
Shows all privileges in this session available to you as the current user:
SESSION_PRIVS
Views for audits currently taking place are created by this script:
cataudit.sql
a list of audit entries generated by the exists option of the audit command:
DBA_AUDIT_EXISTS
A list of audit entries generated for object audits:
DBA_AUDIT_OBJECT
A list of audit entries generated by session connects and disconnects:
DBA_AUDIT_SESSION
A list of audit entries generated by statement options of the audit command:
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A list of all entries in the AUD$ table collected by the audit command:
DBA_AUDIT_TRAIL
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DBA_ROLES
Names of all users and the roles granted to them:
DBA_ROLE_PRIVS
All the roles and the roles that are granted to them:
ROLE_ROLE_PRIVS
Which system privileges have been granted to a role:
DBA_SYS_PRIVS
All the system privileges granted only to roles:
ROLE_SYS_PRIVS
All the object privileges granted only to roles:
ROLE_TAB_PRIVS
All the roles available in the current session:
SESSION_ROLES
Which object privilege has been granted to a role:
DBA_TAB_PRIVS
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DA

You can also find a lot of stuff by doing:
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Hi,
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Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for Linux: Version 11.2.0.1.0 - Production
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>
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>
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e17126/subprograms.htm#LNPLS698

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user12941450 wrote:
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system. The ABAP Dictionary is completely integrated in the ABAP Development Workbench. All
the other components of the Workbench can actively access the definitions stored in the ABAP
Dictionary.
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table types). You can also define the structure of database objects (tables, indexes and views) in
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ABAP Dictionary
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´ D´Deevveeloloppmmeenntt e ennvviriroonnmmeenntt
R Ruunnttimimee e ennvviriroonnmmeenntt o off t thhee a apppplilcicaattioionn
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Interpreter
Dialog
Control Interfaces Screen
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Tools
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Modeler
Screen
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Dictionary at the same time.
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BC - ABAP Dictionary SAP AG
ABAP Dictionary
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changed.
SAP AG BC - ABAP Dictionary
Tables
December 1999 13
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Activation
program and
DB UTILITY
T1 T2 T3 ... Tn
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T3
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Database-independent Definition of the
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DO REWARD IF USEFUL!

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NewDay wrote:
Hello Guru’s
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Reward points for useful Answers
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What is "DBMS_LOCK_ALLOCATED" dictionary view??

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