2026-03-12 20:23:15

tpt/la.sql

@@ -0,0 +1,30 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+--------------------------------------------------------------------------------
+--
+-- File name:   la.sql ( Latch Address )
+-- Purpose:     Show which latch occupies a given memory address and its stats
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @la <address_in_hex>
+--              @la 50BE2178
+--
+--------------------------------------------------------------------------------
+column la_name heading NAME format a45
+column la_chld heading CHLD format 99999
+
+select 
+    addr, latch#, 0 la_chld, name la_name, gets, immediate_gets igets, 
+    misses, immediate_misses imisses, spin_gets spingets, sleeps, wait_time
+from v$latch_parent
+where addr = hextoraw(lpad('&1', (select vsize(addr)*2 from v$latch_parent where rownum = 1) ,0))
+union all
+select 
+    addr, latch#, child#, name la_name, gets, immediate_gets igets, 
+    misses, immediate_misses imisses, spin_gets spingets, sleeps, wait_time 
+from v$latch_children
+where addr = hextoraw(lpad('&1', (select vsize(addr)*2 from v$latch_children where rownum = 1) ,0))
+/