2026-03-12 20:23:15

vg/sp_buffer_hit_ratio.sql

@@ -0,0 +1,20 @@
+set echo off
+set verify off
+column bhr format 999
+column mydate heading 'YYYY-MM-DD HH24'
+set pages 10000
+
+select 
+   to_char(snap_time,'yyyy-mm-dd HH24') mydate,
+   new.name buffer_pool_name,
+  (((new.consistent_gets-old.consistent_gets)+(new.db_block_gets-old.db_block_gets))-(new.physical_reads-old.physical_reads)) 
+  /((new.consistent_gets-old.consistent_gets)+(new.db_block_gets-old.db_block_gets))*100 bhr
+from perfstat.stats$buffer_pool_statistics old,
+     perfstat.stats$buffer_pool_statistics new,
+     perfstat.stats$snapshot sn
+where snap_time > sysdate - &&1
+      and new.name=old.name
+      and new.snap_id=sn.snap_id
+      and old.snap_id=sn.snap_id-1
+order by 1 asc
+/