2026-03-12 20:23:15

vg/asm_imbalance2.sql

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+
+
+/*
+ 
+**********************************************************
+********* Needs to be run on ASM instance ****************
+**********************************************************
+
+Max and min columns should be close to each other for balanced files.
+
+file# max min
+=== === ===
+3013   57  941
+3018   58  942
+3021   59  942
+3043   940 942
+3053   938 941
+
+** All the disks in this example are having the same total capacity.
+
+From the output above, files with imbalanced extents are file# 3013, 3018 and 3021. For example, for file# 3013 there are 59 extents in one disk and 942 extents in another disk.  
+
+
+File# 3043 and 3053 have extents almost equally balanced. Small imbalances are expected.
+
+*/
+
+DEFINE diskgroup_number="&&1"
+
+set pagesize 55
+set linesize 90
+
+SELECT group_kffxp Group#
+     , number_kffxp file#
+     , MAX(count1) MAX
+     , MIN(count1) MIN
+FROM
+    (SELECT group_kffxp
+         ,  number_kffxp
+         ,  disk_kffxp
+         ,  COUNT(XNUM_KFFXP) count1
+    FROM  sys.x$kffxp
+    WHERE group_kffxp = &diskgroup_number
+    ANd disk_kffxp != 65534
+    GROUP BY group_kffxp, number_kffxp, disk_kffxp
+    )
+GROUP BY group_kffxp, number_kffxp;
+ORDER BY group_kffxp
+       , number_kffxp
+
+UNDEFINE diskgroup_number