V$SESSION

Oracle Database: Uncover Blocking Sessions with a Powerful SQL Query using v$lock Purpose Identify and resolve performance bottlenecks in your Oracle database by detecting blocking sessions using this powerful SQL query. Gain insights into the query's mechanics and learn how to optimize your database for smoother …

Identify Locked Objects in Oracle Database using v$locked_object, dba_objects, v$lock and v$session Purpose A developer reports that an INSERT that should finish in seconds is still running after ten minutes. No error has come back to the application, no timeout has fired, and nothing is moving. In the vast majority of …

Oracle Database: Real-Time SQL Tracing for In-depth Performance Insights Purpose This Oracle database technique empowers you to dynamically enable or disable SQL tracing for specific sessions. SQL tracing captures detailed information about SQL statements executed within a session, providing valuable insights into …

Real-Time Oracle Rollback Detection: Is Your Database Undoing Changes? This SQL query monitors real-time rollbacks in Oracle databases. It identifies which sessions are actively undoing changes and tracks their progress by observing the used_ublk value (the number of undo blocks in use). When used_ublk reaches zero, …

Lists the Contents of the Temporary Tablespace(s), Including Details About Each Temporary Object and Its Associated Session Sample SQL Command 1set pages 999 lines 100 2col username format a15 3col mb format 999,999 4select su.username 5, ses.sid 6, ses.serial# 7, su.tablespace 8, ceil((su.blocks * dt.block_size) / …

Show all Active SQL for Sessions using v$session and v$sqlarea Gain real-time insights into currently active user sessions and the SQL statements they are executing to troubleshoot performance issues and optimize resources SQL Code 1set feedback off 2set serveroutput on size 9999 3column username format a20 4column …

Display Oracle v$session_longops sessions Gain visibility into recently completed long-running operations for monitoring performance and resource usage SQL Code 1set lines 100 pages 999 2col username format a15 3col message format a40 4col remaining format 9999 5select username 6, to_char(start_time, 'hh24:mi:ss …

List all open oracle cursors by user or username Track open cursor usage across user sessions to identify potential resource constraints or inefficiencies in database access patterns SQL Code 1set pages 999 lines 300 2col username format a40 3select sess.username as username 4, sess.sid as sid 5, sess.serial# as serial …

Display the users current Session SQL SQL Code 1Select sql_text 2from v$sqlarea 3where (address, hash_value) in 4(select sql_address, sql_hash_value 5 from v$session 6 where username like '&username') 7/ Sample Oracle Output 1Enter value for username: sys 2old 6: where username like '&username') 3new 6: where username …

Display Session status associated with the specified os process id SQL Code 1select s.username 2, s.sid 3, s.serial# 4, p.spid 5, last_call_et 6, status 7from V$SESSION s 8, V$PROCESS p 9where s.PADDR = p.ADDR 10and p.spid='&pid' 11/ Sample Oracle Output 1Enter value for pid: 9999 2old 10: and p.spid='&pid' 3new 10: …