E/s and too many newspapers of archiving system

Hi all

It frustrates me. Our database of production began to produce too many logs archived redo instantly - once again. This has happened before; Two months ago, that our database was producing too many newspapers Archives. just then we started to get async IO error, we consulted a DBA and it restarted the database server by telling us that it was caused by the system (?).

But after this restart, the amount of archive logs decreased significantly. I was remove the logs by hand (350 GB GB 300 DB arch), and after that the archive logs don't overrun never 10% of the area of archive of 300 GB. Currently, the newspapers increase by 1% (3 GB) for 7-8 minutes, which are already too.

I checked in Enterprise Manager, the graph of I/o system is continuous and details show the process as ARC0, ARC1, LGWR (read sequential log file, db file write parallels are most active). Also Phsycal bed are very contradictory and exceed 30000 Ko at times. Undo tablespace is full almost all the time causing ORA-01555.

The symptoms above all started today. The database is closed at 03:00 to perform a backup in offline mode and is open until 06:00 every day.

Nothing has changed on the database (9.2.0.8), applications (11.5.10.2) or BONES (AIX 5.3).

What is the reason for this more foolish behavior? Please help me.

Thanks in advance.
Kind regards.
Burak

So you say that log switches are increased by 5-6 to 130-140? It's a huge and unacceptable increase amount!

Can you please also post the last lines of your alert.log file?

What is the result of the following query?

SQL > select Blocks_Processed sofar, totalwork Total_Work, round ((sofar/totalwork) * 100, 2) Percentage_Completed, Total_Work_Left totalwork-sofar, start_time Start_Time, round ((elapsed_seconds/60), 0) Elapsed_Minutes, substr (message, 1, 33) Message, username
v $ session_longops;

Ogan

Tags: Database

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