Handling Issues in Oracle

Question

Hi Experts,
It seems that there is lot of issues in my ORACLE Server stating
ORA-00054: resource busy and acquire with NOWAIT specified
I guess this happens when transactions is not committed from front end (PHP), So i just need to query what are the sessions available in block status and need to send an alert mail ... for this.
Can some one help me in achieving this?
Thanks,
Dharan V

Answer 1

Hi,
This is My Trigger
CREATE OR REPLACE TRIGGER TRG_TESTL AFTER SERVERERROR ON DATABASE
DECLARE
vUserName     VARCHAR2(100);
vSessionId          VARCHAR2(50);
vObject          VARCHAR2(1000);
vObjectType     VARCHAR2(30);
vStatus          VARCHAR2(100);
vModeHeld          VARCHAR2(200);     
BEGIN
     SELECT     
          oracle_username || ' (' || s.osuser || ')' username
          ,s.sid || ',' || s.serial# sess_id
          ,owner || '.' ||     object_name object
          ,object_type
          ,decode(     l.block
          ,0, 'Not Blocking'
          ,1, 'Blocking'
          ,2, 'Global') status
          ,decode(v.locked_mode
          ,0, 'None'
          ,1, 'Null'
          ,2, 'Row-S (SS)'
          ,3, 'Row-X (SX)'
          ,4, 'Share'
          ,5, 'S/Row-X (SSX)'
          ,6, 'Exclusive', TO_CHAR(lmode)) mode_held
     INTO
     vUserName,vSessionId,vObject,vObjectType,vStatus,vModeHeld
     FROM     
          v$locked_object v
          ,dba_objects d
          ,v$lock l
          ,v$session s
     WHERE
          v.object_id = d.object_id
          AND v.object_id = l.id1
          AND v.session_id = s.sid
     ORDER BY oracle_username,session_id;
     Sp_Sendemail('UserName : '||vUserName||','||'SessionId :'||vSessionId||','||'Object Name :'||vObject||','||'Object Type:'||vObjectType||','||'Status :'||vStatus||','||'Mode Held :'||vModeHeld);     
END;
Warning: TRIGGER created with compilation errors.
What i am doing wrong here?