2026-03-12 20:23:15

tpt/ksmsp.sql

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+-- taken from metalink note 396940.1
+-- customized by Tanel 
+
+prompt
+prompt WARNING!!! This script will query X$KSMSP, which will cause heavy shared pool latch contention 
+prompt in systems under load and with large shared pool. This may even completely hang 
+prompt your instance until the query has finished! You probably do not want to run this in production!
+prompt
+pause  Press ENTER to continue, CTRL+C to cancel...
+
+
+col sga_heap format a15 
+col size format a10 
+col chunkcomment for a25
+
+break on subpool on duration on sga_heap skip 1 on status skip 1 on chunkcomment
+
+select 
+	KSMCHIDX subpool, 
+  KSMCHDUR duration,
+	'sga heap('||KSMCHIDX||','||KSMCHDUR||')' sga_heap,
+	ksmchcls Status, 
+	substr(ksmchcom,1,decode(instr(ksmchcom,'^'),0,99,instr(ksmchcom,'^'))) ChunkComment,
+	decode(trunc(ksmchsiz/1024),
+		0,'0-1K', 
+		1,'1-2K', 
+		2,'2-3K',
+		3,'3-4K', 
+		4,'4-5K',
+		5,'5-6k',
+		6,'6-7k',
+		7,'7-8k',
+		8,'8-9k', 
+		9,'9-10k',
+		'> 10K') "SIZE", 
+	count(*),
+	sum(ksmchsiz) "SUM(BYTES)",
+	min(ksmchsiz) MinBytes, 
+	max(ksmchsiz) MaxBytes,
+	trunc(avg(ksmchsiz)) AvgBytes 
+from 
+	x$ksmsp 
+where 
+	1=1
+and	lower(KSMCHCOM) like lower('%&1%')
+group by 
+	ksmchidx, 
+  ksmchdur,
+	ksmchcls,
+--	'sga heap('||KSMCHIDX||','||KSMCHDUR'||)',
+	substr(ksmchcom,1,decode(instr(ksmchcom,'^'),0,99,instr(ksmchcom,'^'))),
+	decode(trunc(ksmchsiz/1024),0,'0-1K',1,'1-2K', 2,'2-3K', 3,'3-4K',4,'4-5K',5,'5-6k',
+		6, '6-7k',7,'7-8k',8,'8-9k', 9,'9-10k','> 10K')
+order by
+	ksmchidx,
+  ksmchdur,
+	ksmchcls,
+	lower(substr(ksmchcom,1,decode(instr(ksmchcom,'^'),0,99,instr(ksmchcom,'^')))),
+	"SIZE"
+/
+
+
+