RE: Size of Global temporary table.

  • From: fairlie rego <fairlie_r@xxxxxxxxx>
  • To: paresh.patel@xxxxxxxxxxxxxx, yong321@xxxxxxxxx
  • Date: Fri, 3 Jul 2009 21:39:57 -0700 (PDT)

I believe this is a currently limitation in the code...
 
Bug 7210183
SQL_ID VALUE IS NOT SAME IN V$TEMPSEG_USAGE AND OTHER VIEWS. 
 
addresses this issue. Haven't checked this in 11.2 yet
 
Thanks








Fairlie Rego
Senior Oracle Consultant
http://el-caro.blogspot.com/
M: +61 402 792 405
 

--- On Sat, 4/7/09, Yong Huang <yong321@xxxxxxxxx> wrote:


From: Yong Huang <yong321@xxxxxxxxx>
Subject: RE: Size of Global temporary table.
To: paresh.patel@xxxxxxxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx, afatkulin@xxxxxxxxx
Received: Saturday, 4 July, 2009, 1:16 AM



Paresh,

I remember v$tempseg_usage (i.e. v$sort_usage) records the previous SQL. I 
found 
my old study note that says

"the two SQL columns (sqladdr and sqlhash) in v$sort_usage record the SQL that 
*last* ran using temporary segment. If the SQL is currently running consuming 
temp space, you have to find it in v$session sql_address and sql_hash_value.. 
V$session.prev_sql_addr and prev_hash_value are exactly the same as 
v$sort_usage.sqladdr and sqlhash, respectively."

So if you want to join, it's prev_sql_id that matches sql_id of v$tempseg_usage.

Yong Huang

-----Original Message-----

You are right Alex. Thanks for your help.

When I use session_address to figure out sql_id from v$session and
v$tempseg_usage views, both show different SQL_IDs.

Here is the query I used,

select a.session_addr,b.saddr,a.sql_id sqlid_tempseg ,b.sql_id
sqlid_session,sid from V$TEMPSEG_USAGE a, v$session b
WHERE a.session_addr= b.saddr;

If I take sql_id which v$session shows and check in v$sql, it shows the
sql which populate this global temporary table, which is correct but
sql_id which v$tempseg_usage has, shows different sql in v$sql.

Does anyone have any idea why both views show different sql_id?

Thanks,
Paresh Patel,



      
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