inconsistent archive log size

I have an Oracle 8.0.4 database running on Windows NT. There are two redo log groups with size of 5M for each redo log. Ever since the creation of the database, there has been inconsistent archive logs generated. Some with the same size of redo logs, many of them with very small size like 500 bytes. It is a development database with very light activity.

Is this a bug or did I miss something?

log_checkpoint_interval = 10000
log_buffer = 163840
log_checkpoint_timeout = 1800
log_archive_buffer = 4
log_archive_buffer_size=127

Any help will be greatly appreciated.

Daphnny

There's two possiblities why you may be getting log files that are not close to 5M:
1. an "alter system swith logfile" command is being executed.
2. You have a redo log file out there that is not sized to 5M.

Quote:

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Originally posted by marist89
There's two possiblities why you may be getting log files that are not close to 5M:
1. an "alter system swith logfile" command is being executed.

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I have hot backup script running once a day with switch log command. But there are archived logs with different size at time other than the backup time.

Quote:

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Originally posted by marist89
2. You have a redo log file out there that is not sized to 5M.

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Here is the query v$log:
13:21:38 SQL> select * from v$log;

GROUP# THREAD# SEQUENCE# BYTES MEMBERS ARC STATUS
FIRST_CHANGE# FIRST_TIM
--------- --------- --------- --------- --------- --- ----------------
------------- ---------
3 1 26 5242880 2 YES INACTIVE
627490 28-JUN-01
4 1 27 5242880 2 NO CURRENT
648478 29-JUN-01
5 1 25 5242880 2 YES INACTIVE
625038 28-JUN-01

Notice the group# is 3, 4, 5. I added these three new groups after the creation of the database and dropped 2 old redo log groups.