RE: FULL Scanned Tables' Identification , within a Tablespace

From: VIVEK_SHARMA <VIVEK_SHARMA_at_infy.com>
Date: Mon, 12 Feb 2001 01:50:55 -0800
Message-ID: <F001.002B176C.20010212014527@fatcity.com>

Arun ,

Bingo , will Check for the Same using the Following SQL script :-

select b.sid,

    substr(a.segment_name,1,25) OBJ_NAME,

    a.segment_type OBJ_TYPE,
    b.p1,
    b.p2 BLOCKID,
    b.p3 BLOCKS,
    b.event

from dba_extents a,

    v$session_wait b
where b.p2 between a.block_id AND (a.block_id+a.blocks)

and a.file_id = b.p1
and b.p1=12
and b.p1text='file#'
and b.event like 'db file scattered%';
 

NOTE - 12 is the File Number of The Datafile of the respective Tablespace

Any Points , Advice on the same ?

> -----Original Message-----
> From: ARUN K C [SMTP:arun_k_c_at_hotmail.com]
> Sent: Monday, February 12, 2001 12:45 AM
> To: Multiple recipients of list ORACLE-L
> Subject: Re: FULL Scanned Tables' Identification , within a
> Tablespace
>
> why dont u check thro the scattered read which goes on thro the
> session_event based on that track the table which is getting fully
> scanned.
>
>
> >From: VIVEK_SHARMA <VIVEK_SHARMA_at_infy.com>
> >Reply-To: ORACLE-L_at_fatcity.com
> >To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
> >Subject: FULL Scanned Tables' Identification , within a Tablespace
> >Date: Sun, 11 Feb 2001 09:10:26 -0800
> >
> >
> >The BLKS_READ Value is 15 Times the READS Value Indicating FULL Table
> Scans
> >
> >Qs. Is such a Product Exceedingly High ? What may generally be termed as
> >acceptable
> >READS is to BLKSREAD ratios ?
> >
> >Qs.Any Advisable ways of locating WHICH Tables of the 50 are going for
> Full
> >Scans during
> >a Single Working Day ?
> >
> >NOTE - The Tablespace Contains 50 Tables .
> >
> >SVRMGR> Rem Sum IO operations over tablespaces.
> >SVRMGR> select
> > 2> table_space||'
> '
> > 3> table_space,
> > 4> sum(phys_reads) reads, sum(phys_blks_rd) blks_read,
> > 5> sum(phys_rd_time) read_time, sum(phys_writes) writes,
> > 6> sum(phys_blks_wr) blks_wrt, sum(phys_wrt_tim) write_time,
> > 7> sum(megabytes_size) megabytes
> > 8> from stats$files
> > 9> group by table_space
> > 10> order by table_space;
> >TABLE_SPACE READS BLKS_READ READ_TIME WRITES BLKS_WRT
> >WRITE_TIME MEGABYTES
> >-------------- ---------- ---------- ---------- ---------- ----------
> >---------- ----------
> >CONTROL 240337 3647178 41802 651 651
> >1666 105
> >
> >Any Other Misc. Observations ?
> >--
> >Please see the official ORACLE-L FAQ: http://www.orafaq.com
> >--
> >Author: VIVEK_SHARMA
> > INET: VIVEK_SHARMA_at_infy.com
> >
> >Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: ARUN K C
> INET: arun_k_c_at_hotmail.com
>
> Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
> San Diego, California -- Public Internet access / Mailing Lists
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: VIVEK_SHARMA
  INET: VIVEK_SHARMA_at_infy.com

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
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To REMOVE yourself from this mailing list, send an E-Mail message
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Received on Mon Feb 12 2001 - 03:50:55 CST