2026-03-12 20:23:15

vdh/show_buffer_cache_contents.sql

@@ -0,0 +1,68 @@
+set pagesize 50000
+set linesize 300
+
+column c0 heading "Owner"                                    format a30
+column c1 heading "Object Name"                              format a30
+column c2 heading "Object Type"                              format a12
+column c3 heading "#Blocks in|Buffer Cache"                  format 999G999G999
+column c4 heading "Object blocks|in Buffer %"                format 999D99
+column c5 heading "Buffer Pool"                              format a15
+column c6 heading "Block Size"                               format 99G999
+
+
+
+with buffer_contents as
+(
+/*+ MATERIALIZE */
+select
+   o.owner                              owner,
+   o.object_name                        object_name,
+   o.subobject_name                     subobject_name,
+   o.object_type                        object_type,
+   count(distinct file# || block#)      num_blocks
+from
+   dba_objects  o,
+   v$bh         bh
+where
+   o.data_object_id  = bh.objd
+and
+   o.owner not in ('SYS','SYSTEM')
+and
+   bh.status != 'free'
+group by
+   o.owner,
+   o.object_name,
+   o.subobject_name,
+   o.object_type
+)
+select
+   t1.owner                                          c0,
+   object_name                                       c1,
+   case when object_type = 'TABLE PARTITION' then 'TAB PART'
+        when object_type = 'INDEX PARTITION' then 'IDX PART'
+        else object_type end c2,
+   sum(num_blocks)                                     c3,
+   (sum(num_blocks)/greatest(sum(blocks), .001))*100 c4,
+   buffer_pool                                       c5,
+   sum(bytes)/sum(blocks)                            c6
+from
+   buffer_contents t1,
+   dba_segments s
+where
+   s.segment_name = t1.object_name
+and
+   s.owner = t1.owner
+and
+   s.segment_type = t1.object_type
+and
+   nvl(s.partition_name,'-') = nvl(t1.subobject_name,'-')
+group by
+   t1.owner,
+   object_name,
+   object_type,
+   buffer_pool
+having
+   sum(num_blocks) > 10
+order by
+   sum(num_blocks) desc
+;