Category: Oracle

This PL/SQL block identifies recently active SQL queries from a specific application server and provides details on their performance and execution plans.  Here is a breakdown of what the script does:

Find the SPID from Oracle’s SID using below SQL. REM **** This is used to get SPID from SID.col username format a30col machine format a20col program format a40accept _sid prompt ‘Enter Oracle Session ID ->’select a.sid, b.pid, b.spid, a.username, a.program,a.machinefrom v$session a,V$process bwhere a.paddr = b.addrand   a.sid = &_sid/ Use ORADEBUG command as below. oradebug…

Read More “Trace a SQL session from another session using ORADEBUG” »

set serveroutput onaccept v_sqlid prompt ‘SQLID:’accept v_phv prompt ‘PHV:’ var pvm numberbegin:pvm := dbms_spm.load_plans_from_cursor_cache(sql_id=>’&v_sqlid’, plan_hash_value=>&v_phv, fixed =>’NO’, enabled=>’YES’);end;/ EXEC dbms_output.put_line(‘Number of plans loaded: ‘ || :pvm);

declaremyplan pls_integer;beginmyplan:=DBMS_SPM.drop_sql_plan_baseline (sql_handle => ‘&sql_handle’);end;/

accept v_sqlid prompt ‘Enter sqlid ‘accept v_phv prompt ‘Enter PHV ‘set serveroutput on DECLAREv_first_snapid number;v_last_snapid number;v_sqlset varchar2(1000);loaded_plans number; BEGINselect max(ss.snap_id)-3, max(ss.snap_id)into v_first_snapid, v_last_snapidfrom DBA_HIST_SQLSTAT S, DBA_HIST_SNAPSHOT SSwhere sql_id = ‘&v_sqlid’and plan_hash_value = ‘&v_phv’and ss.snap_id = S.snap_idand ss.instance_number = S.instance_numberand executions_delta > 0 ; loaded_plans := dbms_spm.load_plans_from_awr( begin_snap=>v_first_snapid,end_snap=>v_last_snapid,basic_filter=>q’# sql_id=’&v_sqlid’ and plan_hash_value=’&v_phv’ #’ ); dbms_output.put_line(‘loaded-plans= ‘ ||…

Read More “Load SPM baseline from AWR” »

set serveroutput onvar res numberexec :res :=DBMS_SPM.DROP_SQL_PLAN_BASELINE (‘&original_sql_handle’,’&original_plan_name’);exec dbms_output.put_line(‘Number of plans dropped: ‘ || :res);

set lines 120 pages 200col dd format a20col inst_id format 99col metric_name format a30col value format 99.99 select x.dd, x.inst_id, x.metric_name, x.value “%CPU”, y.sessfrom(select to_char(sysdate, ‘DD-MON-RRRR:HH24:MI’) DD, inst_id, metric_name, valuefrom gv$sysmetricwhere metric_name like ‘Host CPU Utilization%’ and group_id=2 ) x,(select inst_id, count(1) sess from gv$sessionwhere status = ‘ACTIVE’ and osuser != ‘oracle’group by inst_id) ywhere…

Read More “findinfo.sql (SQL for getting CPU and Active session info)” »

col SAMPLE_TIME format a25col program format a20col SQL_EXEC_START format a25col machine format a15set lines 140 pages 200alter session set nls_date_format=’DD-MON-RRRR:HH24:MI:SS’; select SAMPLE_TIME, SESSION_ID, SESSION_SERIAL#, USER_ID, sql_ID, Machine, program, SQL_EXEC_STARTfrom gv$active_session_historywhere session_id = &v_session_idand sample_time > sysdate – 1/24order by sample_time/