2026-03-12 20:23:15

vdh/workarea_histogram.sql

@@ -0,0 +1,40 @@
+-- overview of the number of optimal / onepass / multipass sorts per workarea histogram bucket
+-- translating the low / high_optimal_size number into human readable units
+
+column low_optimal_size_h format a15 justify right
+column high_optimal_size_h format a15 justify right
+column optimal_executions format 999G999G999G999
+column onepass_executions format 999G999G999G999
+column multipass_executions format 999G999G999G999
+column total_executions format 999G999G999G999
+
+break on inst_id skip 1
+
+select
+  inst_id,
+  case
+    when low_optimal_size >= 1099511627776 then to_char(low_optimal_size/1024/1024/1024/1024, '999G990D99') || ' TB' 
+    when low_optimal_size >= 1073741824 then to_char(low_optimal_size/1024/1024/1024, '999G990D99') || ' GB'
+    when low_optimal_size >= 1048576 then to_char(low_optimal_size/1024/1024, '999G990D99') || ' MB'
+    when low_optimal_size >= 1024 then to_char(low_optimal_size/1024, '999G990D99') || ' KB'
+    else to_char(low_optimal_size, '999G990D99')
+  end as low_optimal_size_h,
+  case
+    when high_optimal_size >= 1099511627776 then to_char(high_optimal_size/1024/1024/1024/1024, '999G990D99') || ' TB' 
+    when high_optimal_size >= 1073741824 then to_char(high_optimal_size/1024/1024/1024, '999G990D99') || ' GB'
+    when high_optimal_size >= 1048576 then to_char(high_optimal_size/1024/1024, '999G990D99') || ' MB'
+    when high_optimal_size >= 1024 then to_char(high_optimal_size/1024, '999G990D99') || ' KB'
+    else to_char(high_optimal_size, '999G990D99')
+  end as high_optimal_size_h,
+  optimal_executions, 
+  onepass_executions, 
+  multipasses_executions, 
+  total_executions 
+from 
+  gv$sql_workarea_histogram 
+order by
+  inst_id, 
+  low_optimal_size
+;
+
+clear breaks