https://www.oraclescripts.com/tags/kill-session/Recent content in Kill Session on Oracle ScriptsHugo -- gohugo.ioenOracleScripts.comMon, 20 Jul 2026 00:00:00 +0000https://www.oraclescripts.com/post/kill-and-disconnect-oracle-sessions-with-alter-system/Mon, 20 Jul 2026 00:00:00 +0000https://www.oraclescripts.com/post/kill-and-disconnect-oracle-sessions-with-alter-system/ <h2 id="kill-and-disconnect-oracle-sessions-with-alter-system">Kill and Disconnect Oracle Sessions with ALTER SYSTEM</h2> <h2 id="purpose">Purpose</h2> <p><code>V$SESSION</code> exposes the <code>SID</code> and <code>SERIAL#</code> pair that both <code>ALTER SYSTEM KILL SESSION</code> and <code>ALTER SYSTEM DISCONNECT SESSION</code> require as their targeting key — a DBA cannot terminate a stuck session without pulling that pair first, and getting it wrong means terminating the wrong connection on an instance where SIDs are reused constantly. Once a session is confirmed as the target — a runaway report query burning CPU, an abandoned connection holding a row lock, an idle session pinning undo — the question shifts from <em>which</em> session to <em>how</em> to end it.</p>