Oracle – obtain the amount of redo files

cornel — Fri, 27 Jun 2008 09:17:43 +0000

I found a query which can be used to estimate what is the amount of storage for database log files and also identify when you have peak periods:

SELECT Start_Date,
       Start_Time,
       Num_Logs,
       Round(Num_Logs * (Vl.Bytes / (1024 * 1024)),
             2) AS Mbytes,
       Vdb.NAME AS Dbname
  FROM (SELECT To_Char(Vlh.First_Time,
                       'YYYY-MM-DD') AS Start_Date,
               To_Char(Vlh.First_Time,
                       'HH24') || ':00' AS Start_Time,
               COUNT(Vlh.Thread#) Num_Logs
          FROM V$log_History Vlh
         GROUP BY To_Char(Vlh.First_Time,
                          'YYYY-MM-DD'),
                  To_Char(Vlh.First_Time,
                          'HH24') || ':00') Log_Hist,
       V$log Vl,
       V$database Vdb
 WHERE Vl.Group# = 1
 ORDER BY Log_Hist.Start_Date,
          Log_Hist.Start_Time;

IBM DB2 9.5 strikes again

cornel — Thu, 26 Jun 2008 14:09:11 +0000

Today, I visited the TPC website and I saw that IBM is again number one on the TPC-C benchmark. Take a look at the server configuration: 4TB of RAM and 730TB of disk storage – I’m wonder what the next winning configuration will be.

Cornel Creanga » SQL and Databases

Oracle – obtain the amount of redo files

IBM DB2 9.5 strikes again