log file switch (archiving needed)

From: Xu, Roger <Roger.Xu_at_dpsg.com>
Date: Fri, 6 Mar 2009 11:10:41 -0700
Message-ID: <3DC31002EB0BDD46B2B5730CEDF0277008D88F_at_bcxoemb03.dpsg.net>



Environment: 2 node Data Guard (10.2.0.4.0 - 64bit )  

Is this normal or there is an issue? So far, nobody complaints performance problem.  

SQL> select time_waited from v$system_event where event = 'log file switch (archiving needed)';  

TIME_WAITED


  715859487    

Thu Mar 5 23:05:26 2009

LGWR: Standby redo logfile selected to archive thread 1 sequence 433

LGWR: Standby redo logfile selected for thread 1 sequence 433 for destination LOG_ARCHIVE_DEST_2

Thu Mar 5 23:05:26 2009

Thread 1 advanced to log sequence 433 (LGWR switch)

  Current log# 1 seq# 433 mem# 0:
/SRV_ACE/server/database/logs/redo01.log

Fri Mar 6 03:39:02 2009

LGWR: Standby redo logfile selected to archive thread 1 sequence 434

LGWR: Standby redo logfile selected for thread 1 sequence 434 for destination LOG_ARCHIVE_DEST_2

Fri Mar 6 03:39:02 2009

Thread 1 advanced to log sequence 434 (LGWR switch)

  Current log# 2 seq# 434 mem# 0:
/SRV_ACE/server/database/logs/redo02.log

Fri Mar 6 04:39:02 2009

LGWR: Standby redo logfile selected to archive thread 1 sequence 435

LGWR: Standby redo logfile selected for thread 1 sequence 435 for destination LOG_ARCHIVE_DEST_2

Fri Mar 6 04:39:02 2009

Thread 1 advanced to log sequence 435 (LGWR switch)

  Current log# 3 seq# 435 mem# 0:
/SRV_ACE/server/database/logs/redo03.log

Fri Mar 6 04:49:01 2009

LGWR: Standby redo logfile selected to archive thread 1 sequence 436

LGWR: Standby redo logfile selected for thread 1 sequence 436 for destination LOG_ARCHIVE_DEST_2

Fri Mar 6 04:49:01 2009

Thread 1 advanced to log sequence 436 (LGWR switch)

  Current log# 1 seq# 436 mem# 0:
/SRV_ACE/server/database/logs/redo01.log
     

Waiting for a log switch because the log that the LGWR will be switching into has not been archived yet. Check the alert file to make sure that archiving has not stopped due to a failed archive write. To speed archiving, consider adding more archive processes or putting the archive files on striped disks.    

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Received on Fri Mar 06 2009 - 12:10:41 CST

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