[dba-SQLServer] Log file reuse

It will reuse space if you are clearing the data at the check points.
One of the many reasons I have auto backups when the log hits > 60%.
You can choose juse to runt the truncate log backup command that just
simply flushes out committed transactions, in my environment I cannot
do that but should not be too bad for you if you so need this
functionality.

Btw out of curiosity what was the error you received?




On 12/8/07, jwcolby <jwcolby at colbyconsulting.com> wrote:
> Well, the log file on another drive failed with errors.  No time to
> troubleshoot, I am just moving the log back to the same drive.
>
>
> John W. Colby
> Colby Consulting
> www.ColbyConsulting.com
> -----Original Message-----
> From: dba-sqlserver-bounces at databaseadvisors.com
> [mailto:dba-sqlserver-bounces at databaseadvisors.com] On Behalf Of jwcolby
> Sent: Saturday, December 08, 2007 11:20 AM
> To: dba-sqlserver at databaseadvisors.com
> Subject: [dba-SQLServer] Log file reuse
>
> If a SQL Server action query completes, does SQL server reuse the now empty
> log file?
>
> I have a raid array that is huge and I use to hold these large databases.  I
> have another single drive sitting on a SATA channel.  I am experimenting by
> placing the log file onto that single SATA drive and the data file on the
> raid.  I am running about 660 more action queries to move data from fields
> in a 50 million record 680 field wide table to a 3 field wide table.  The
> source table and the destination table both sit on the raid, with the log
> file out on the non-raid.  I am hoping that because of IO issues, placing
> the log file on a different physical drive will speed things up.  I have no
> way to really know however.
>
> I am hoping that once the log file is expanded (it is about 13 g now) that
> unless the data in the subsequent fields requires more log file room, the
> "cost" of expanding the log file will go away and the log file empty space
> will be reused for each subsequent action query.
>
> John W. Colby
> Colby Consulting
> www.ColbyConsulting.com
>
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