2026-03-12 20:23:15

timhall/monitoring/hot_blocks.sql

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+-- -----------------------------------------------------------------------------------
+-- File Name    : https://oracle-base.com/dba/monitoring/hot_blocks.sql
+-- Author       : Tim Hall
+-- Description  : Detects hot blocks.
+-- Call Syntax  : @hot_blocks
+-- Last Modified: 17/02/2005
+-- -----------------------------------------------------------------------------------
+SET LINESIZE 200
+SET VERIFY OFF
+
+SELECT *
+FROM   (SELECT name,
+               addr,
+               gets,
+               misses,
+               sleeps
+        FROM   v$latch_children
+        WHERE  name = 'cache buffers chains'
+        AND    misses > 0
+        ORDER BY misses DESC)
+WHERE  rownum < 11;
+
+ACCEPT address PROMPT "Enter ADDR: "
+
+COLUMN owner FORMAT A15
+COLUMN object_name FORMAT A30
+COLUMN subobject_name FORMAT A20
+
+SELECT *
+FROM   (SELECT o.owner,
+               o.object_name,
+               o.subobject_name,
+               bh.tch,
+               bh.obj,
+               bh.file#,
+               bh.dbablk,
+               bh.class,
+               bh.state
+        FROM   x$bh bh,
+               dba_objects o
+        WHERE  o.data_object_id = bh.obj
+        AND    hladdr = '&address'
+        ORDER BY tch DESC)
+WHERE  rownum < 11;