2026-03-12 20:23:15

idev/perf_shared_pool_memory.sql

@@ -0,0 +1,36 @@
+-- +----------------------------------------------------------------------------+
+-- |                          Jeffrey M. Hunter                                 |
+-- |                      jhunter@idevelopment.info                             |
+-- |                         www.idevelopment.info                              |
+-- |----------------------------------------------------------------------------|
+-- |      Copyright (c) 1998-2011 Jeffrey M. Hunter. All rights reserved.       |
+-- |----------------------------------------------------------------------------|
+-- | DATABASE : Oracle                                                          |
+-- | FILE     : perf_shared_pool_memory.sql                                     |
+-- | CLASS    : Tuning                                                          |
+-- | PURPOSE  : Query the total memory in the Shared Pool and the amount of     |
+-- |            free memory.                                                    |
+-- | NOTE     : As with any code, ensure to test this script in a development   |
+-- |            environment before attempting to run it in production.          |
+-- +----------------------------------------------------------------------------+
+
+SET LINESIZE 145
+SET PAGESIZE 9999
+
+COLUMN value       FORMAT 999,999,999,999 HEADING "Shared Pool Size"
+COLUMN bytes       FORMAT 999,999,999,999 HEADING "Free Bytes"
+COLUMN percentfree FORMAT 999             HEADING "Percent Free"
+
+SELECT
+    TO_NUMBER(p.value)       value
+  , s.bytes                  bytes
+  , (s.bytes/p.value) * 100  percentfree
+FROM
+    v$sgastat    s
+  , v$parameter  p
+WHERE
+      s.name = 'free memory'
+  AND s.pool = 'shared pool'
+  AND p.name = 'shared_pool_size'
+/
+