2026-03-12 20:23:15

vdh/df_high_water_mark.sql

@@ -0,0 +1,20 @@
+column db_block_size new_value _BLOCK_SIZE;
+
+select to_number(value) db_block_size from v$parameter where name = 'db_block_size';
+
+select
+   a.tablespace_name,
+   a.file_id,
+   a.file_name,
+   a.bytes/1024/1024 file_mb,
+   ((c.block_id+(c.blocks-1)) * &_BLOCK_SIZE) /1024/1024 HWM_MB,
+   (a.bytes - ((c.block_id+(c.blocks-1)) * &_BLOCK_SIZE))/1024/1024 SAVING_mb
+from dba_data_files a,
+   (select file_id,max(block_id) maximum
+    from dba_extents
+    group by file_id) b,
+dba_extents c
+where a.file_id = b.file_id
+and c.file_id = b.file_id
+and c.block_id = b.maximum
+order by 6;