Category: Oracle

SQL> select distinct sid from v$mystat; SID ———- 1365

#!/bin/ksh -x # First, we must set the environment . . . . ORACLE_SID=WEBP18F export ORACLE_SID ORACLE_HOME=`cat /var/opt/oracle/oratab|grep ^$ORACLE_SID:|cut -f2 -d’:’` export ORACLE_HOME PATH=$ORACLE_HOME/bin:$PATH export PATH SERVER_NAME=`uname -a|awk ‘{print $2}’` typeset -u SERVER_NAME export SERVER_NAME # sample every five minutes (300 seconds) . . . . SAMPLE_TIME=30 while true do vmstat ${SAMPLE_TIME} 2 > /tmp/msg$$…

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Subject: Extent and Block Space Calculation and Usage in V7-V9 Database Doc ID :10640.1

Driver table: Take the driver table which returns the less number of rows for predicate with literal valae. For example, Consider the statement below: SELECT SUM(BIP.VALUE) value FROM BSKT_ITEM_CALC_PRICING BIP,BSKT_PRICING_ELEMENT BP WHERE BIP.BASKET_ITEM_ID IN (:”SYS_B_0″) AND BIP.PRICING_ELEMENT_ID = BP.PRICING_ELEMENT_ID AND BP.PRICING_TYPE_CODE = :1; Here SQL> select BASKET_ITEM_ID, count(1) from BSKT_ITEM_CALC_PRICING group by BASKET_ITEM_ID; BASKET_ITEM_ID COUNT(1)…

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set lines 132 set pages 1400 SELECT LPAD(‘ ‘,2*(LEVEL-1))||operation||’ ‘||options ||’ ‘||object_name ||’ ‘|| DECODE(id, 0, ‘Cost = ‘||position) “Query Plan” FROM v$sql_plan START WITH id = 0 and sql_id=’4ftvbpzhwkfd8′ and child_number=0 CONNECT BY PRIOR id = parent_id and sql_id=’4ftvbpzhwkfd8′ and child_number=0;

Good Doc About UNDO Management: http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:6894817116500 Cache Buffer Chain Latch: http://www.orafaq.com/maillist/oracle-l/2003/02/27/2671.raw

/etc/init.d/init.cssd stop to stop cssd process.

column osuser format a10 column username format a30 column machine format a30 column program format a50 set lines 132 set pages 500 select osuser, username, machine, program from v$session; select machine, username, count(1) from v$session group by machine, username;

REM ***** gsp.sql ***** REM ***** This is used to get SPID from SID. col username format a30 col machine format a20 col program format a40 accept _sid prompt ‘Enter Oracle Session ID ->’ select a.sid, b.pid, b.spid, a.username,a.program,a.machine from v$session a,V$process b where a.paddr = b.addr and a.sid = &_sid / REM ***** gsq.sql…

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Using following query, we can estimate # of rows resides in each USN (Rollback Segment) and who fired that transactions. New modified GCU.sql on 16-JUN-2006 /* Get Curent USN */ column start_dt format a20 set lines 132 select /*+ ALL_ROWS */ a.usn, a1.name, a.extents, a.hwmsize, a.status usn_status, to_char(b.start_date, ‘DD-MON-RRRR:HH24:MI:SS’) start_dt, b.status tx_status, c.sid, c.sql_id, b.used_ublk,…

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