2026-03-12 20:23:15

idev/perf_file_io_7.sql

@@ -0,0 +1,59 @@
+-- +----------------------------------------------------------------------------+
+-- |                          Jeffrey M. Hunter                                 |
+-- |                      jhunter@idevelopment.info                             |
+-- |                         www.idevelopment.info                              |
+-- |----------------------------------------------------------------------------|
+-- |      Copyright (c) 1998-2011 Jeffrey M. Hunter. All rights reserved.       |
+-- |----------------------------------------------------------------------------|
+-- | DATABASE : Oracle                                                          |
+-- | FILE     : perf_file_io_7.sql                                              |
+-- | CLASS    : Tuning                                                          |
+-- | PURPOSE  : Reports on Read/Write datafile activity. This script was        |
+-- |            designed to work with Oracle7 and Oracle8. This script can be   |
+-- |            run against higher database versions (i.e. Oracle8i) but will   |
+-- |            not return information about true TEMPORARY tablespaces.        |
+-- |            (i.e. use of "tempfiles")                                       |
+-- | NOTE     : As with any code, ensure to test this script in a development   |
+-- |            environment before attempting to run it in production.          |
+-- +----------------------------------------------------------------------------+
+
+SET LINESIZE 145
+SET PAGESIZE 9999
+SET VERIFY   off
+
+COLUMN phys_reads   NEW_VALUE xphys_reads  NOPRINT FORMAT a1
+COLUMN phys_writes  NEW_VALUE xphys_writes NOPRINT FORMAT a1
+
+SELECT
+    SUM(phyrds) phys_reads
+  , SUM(phywrts) phys_writes
+FROM v$filestat
+/
+
+COLUMN name       FORMAT a45          HEAD 'File Name'
+COLUMN phyrds     FORMAT 999,999,999  HEAD 'Physical Reads'
+COLUMN phywrts    FORMAT 999,999,999  HEAD 'Physical Writes'
+COLUMN read_pct   FORMAT 999.99       HEAD 'Read Pct.'
+COLUMN write_pct  FORMAT 999.99       HEAD 'Write Pct.'
+
+BREAK ON report
+COMPUTE SUM OF phyrds     ON report
+COMPUTE SUM OF phywrts    ON report
+COMPUTE AVG OF read_pct   ON report
+COMPUTE AVG OF write_pct  ON report
+
+
+SELECT
+    name                                    name
+  , phyrds                                  phyrds
+  , phyrds * 100 / &xphys_reads             read_pct
+  , phywrts                                 phywrts
+  , phywrts * 100 / &xphys_writes           write_pct
+FROM
+    v$datafile       df
+  , v$filestat       fs
+WHERE
+    df.file# = fs.file#
+ORDER BY phyrds DESC
+/
+