Re: elapsed_time in 9i v$sqlarea

Thu, 31 Jul 2003 21:44:17 -0700 

I know it is not usual, but because ASCII version of the note looked very
ugly, I decided to attach HTML. You can start with stoning as soon as I
say "Jehova".
On 2003.07.31 17:44, [EMAIL PROTECTED] wrote:

What's elapsed_time in v$sqlarea? I believe this was introduced in Oracle
9i. What is the unit for it? Strangely, the Oracle 9i "Server Reference"
manual seems to have missed this altogether.

I executed a query, the execution time of which was approximately 9
seconds. But when I look up v$sqlarea, the elapsed time is shown as 820802.

Thanks
Raj



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"V$SQL" Reference Note



    

  • 
The information here contains the view description from the Oracle9i
documentation along with any additional Support / Historical Notes related to this view. 


  • Earlier versions of Oracle may not include all columns.

to see Documentation references for this view




Oracle9i Information


  • 






    
This view lists statistics on shared SQL area without the GROUP BY clause
and contains one row for each child of the original SQL text entered.

    
   


    

    


    

Column 


Datatype 


Description 

    
    

    


    
SQL_TEXT 
    		



    
VARCHAR2(1000) 
    		



    
The first thousand characters of the SQL text for the current cursor 
    		

    

    


    
SHARABLE_MEM 
    		



    
NUMBER 
    		



    
Amount of shared memory, in bytes, used by this child cursor 
    		

    

    


    
PERSISTENT_MEM 
    		



    
NUMBER 
    		



    
Fixed amount of memory, in bytes, used for the lifetime of this child cursor 
    		

    

    


    
RUNTIME_MEM 
    		



    
NUMBER 
    		



    
Fixed amount of memory required during the execution of this child cursor 
    		

    

    


    
SORTS 
    		



    
NUMBER 
    		



    
The number of sorts that was done for this child cursor 
    		

    

    


    
LOADED_VERSIONS 
    		



    
NUMBER 
    		



    
1 if context heap is loaded, 0 otherwise 
    		

    

    


    
OPEN_VERSIONS 
    		



    
NUMBER 
    		



    
1 if the child cursor is locked, 0 otherwise 
    		

    

    


    
USERS_OPENING 
    		



    
NUMBER 
    		



    
The number of users executing the statement 
    		

    

    


    
EXECUTIONS 
    		



    
NUMBER 
    		



    
The number of executions that took place on this object since it was brought into the library cache 
    		

    

    


    
USERS_EXECUTING 
    		



    
NUMBER 
    		



    
The number of users executing the statement 
    		

    

    


    
LOADS 
    		



    
NUMBER 
    		



    
The number of times the object was loaded or reloaded 
    		

    

    


    
FIRST_LOAD_TIME 
    		



    
VARCHAR2(19) 
    		



    
The time stamp of the parent creation time 
    		

    

    


    
INVALIDATIONS 
    		



    
NUMBER 
    		



    
The number of times this child cursor has been invalidated 
    		

    

    


    
PARSE_CALLS 
    		



    
NUMBER 
    		



    
The number of parse calls for this child cursor 
    		

    

    


    
DISK_READS 
    		



    
NUMBER 
    		



    
The number of disk reads for this child cursor 
    		

    

    


    
BUFFER_GETS 
    		



    
NUMBER 
    		



    
The number of buffer gets for this child cursor 
    		

    

    


    
ROWS_PROCESSED 
    		



    
NUMBER 
    		



    
The total number of rows the parsed SQL statement returns 
    		

    

    


    
COMMAND_TYPE 
    		



    
NUMBER 
    		



    
The Oracle command type definition 
    		

    

    


    
OPTIMIZER_MODE 
    		



    
VARCHAR2(10) 
    		



    
Mode under which the SQL statement is executed 
    		

    

    


    
OPTIMIZER_COST 
    		



    
NUMBER 
    		



    
The cost of this query given by the optimizer 
    		

    

    


    
PARSING_USER_ID 
    		



    
NUMBER 
    		



    
The user ID of the user who originally built this child cursor 
    		

    

    


    
PARSING_SCHEMA_ID 
    		



    
NUMBER 
    		



    
The schema ID that was used to originally build this child cursor 
    		

    

    


    
KEPT_VERSIONS 
    		



    
NUMBER 
    		



    
Indicates whether this child cursor has been marked to be kept pinned in cache using
the DBMS_SHARED_POOL package 
    		

    

    


    
ADDRESS 
    		



    
RAW(4) 
    		



    
The address of the handle to the parent for this cursor 
    		

    

    


    
TYPE_CHK_HEAP 
    		



    
RAW(4) 
    		



    
The descriptor of the type check heap for this child cursor 
    		

    

    


    
HASH_VALUE 
    		



    
NUMBER 
    		



    
The hash value of the parent statement in the library cache 
    		

    

    


    
PLAN_HASH_VALUE 
    		



    
NUMBER 
    		



    
A numerical representation of the SQL plan for this cursor. Comparing one PLAN_HASH_VALUE
to another easily identifies whether or not two plans are the same (rather than comparing
the two plans line by line). 
    		

    

    


    
CHILD_NUMBER 
    		



    
NUMBER 
    		



    
The number of this child cursor 
    		

    

    


    
MODULE 
    		



    
VARCHAR2(64) 
    		



    
Contains the name of the module that was executing at the time that the SQL statement
was first parsed as set by calling DBMS_APPLICATION_INFO.SET_MODULE 
    		

    

    


    
MODULE_HASH 
    		



    
NUMBER 
    		



    
The hash value of the module that is named in the MODULE column 
    		

    

    


    
ACTION 
    		



    
VARCHAR2(64) 
    		



    
Contains the name of the action that was executing at the time that the SQL statement
was first parsed as set by calling DBMS_APPLICATION_INFO.SET_ACTION 
    		

    

    


    
ACTION_HASH 
    		



    
NUMBER 
    		



    
The hash value of the action that is named in the ACTION column 
    		

    

    


    
SERIALIZABLE_ABORTS 
    		



    
NUMBER 
    		



    
The number of times the transaction fails to serialize, producing ORA-08177 errors, per cursor 
    		

    

    


    
OUTLINE_CATEGORY 
    		



    
VARCHAR2(64) 
    		



    
If an outline was applied during construction of the cursor, this column displays
the category of that outline. Otherwise the column is left blank. 
    		

    

    


    
CPU_TIME 
    		



    
NUMBER 
    		



    
CPU time (in microseconds) used by this cursor for parsing/executing/fetching 
    		

    

    


    
ELAPSED_TIME 
    		



    
NUMBER 
    		



    
Elapsed time (in microseconds) used by this cursor for parsing/executing/fetching 
    		

    

    


    
OUTLINE_SID 
    		



    
NUMBER 
    		



    
Outline session identifier 
    		

    

    


    
CHILD_ADDRESS 
    		



    
RAW(4) 
    		



    
Address of the child cursor 
    		

    

    


    
SQLTYPE 
    		



    
NUMBER 
    		



    
Denotes the version of the SQL language used for this statement 
    		

    

    


    
REMOTE 
    		



    
VARCHAR2(1) 
    		



    
(Y/N) Identifies whether the cursor is remote mapped 
    		

    

    


    
OBJECT_STATUS 
    		



    
VARCHAR2(19) 
    		



    
Status of the cursor (VALID/INVALID) 
    		

    

    


    
LITERAL_HASH_VALUE 
    		



    
NUMBER 
    		



    
The hash value of the literals which are replaced with system generated bind variables
and are to be matched, when CURSOR_SHARING is used. This is not the
hash value for the SQL statement. If CURSOR_SHARING is not used, the value is 0. 
    		

    

    


    
LAST_LOAD_TIME 
    		



    
VARCHAR2(19) 
    		



    
 
    		

    


    


    

    


    

    


   












Support and Historical Notes for "V$SQL"


  View Definition:
    Use the following SQL to see the view definition of the related GV$ view:

      SELECT view_definition FROM v$fixed_view_definition
       WHERE view_name='GV$SQL';

  Useful Join Columns:
    ( ADDRESS,HASH_VALUE ) - Join to <View:V$SQLTEXT> . ( ADDRESS,HASH_VALUE )
    

  Support Notes:
    This view shows one row for each version of each SQL statement.
    See <View:V$SQLAREA>
for an aggregated view which groups all versions
    of the same SQL statement together.

    When monitoring performance it can be beneficial to use this view 
    rather then V$SQLAREA if looking at only a subset of statements in the
    shared pool.


  Known Issues:


  Articles:


.

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