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V$SQLAREA

From: Pablo Rodriguez <p_rodri99_at_yahoo.es>
Date: Mon, 02 Sep 2002 14:13:22 -0800
Message-ID: <F001.004C5A7C.20020902141322@fatcity.com>


Hi List.

    does anybody know what the OPTIMIZER_MODE = NONE mean in v$sqlarea view ?     

    I've found this document Doc ID: 48131.996 in metalink, but it seems that I don't have access to it.      

The problem I'm facing here is that I am getting this information when analyzing v$sqlarea. What I'm trying to
find out is why suddenly at sequence 5 disk_reads=0 and buffer_gets=0.  

SEQ Address hash_value OPT_MOD FIRST_LOAD_TIME

   Disk_reads Buff_gets Invalidations loads


1    C­° 1069627 NONE      2002-08-28/14:23:58 0     
     0    0        1
2    C­° 1069627 CHOOSE    2002-08-28/14:23:58 10    
    166    0        2
3    C­° 1069627 CHOOSE    2002-08-28/14:23:58 14    
    177    0        2
4    C­° 1069627 CHOOSE    2002-08-28/14:23:58 14    
    177    0        2
5    C­° 1069627 NONE      2002-08-28/14:23:58 0     
      0    0        2
6    C­° 1069627 CHOOSE    2002-08-28/16:16:13 10    
    246    0        2

The Seq value represents occurrences taken at different moments along a day.
Seq 1 was taken at 9 am in the morning, seq 2 at 9:30 , and so on...  

TIA



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