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Increasing the size of the master database

We are running out of space in our master database. Can I delete records from the syslogs table or is there a way to expand the master database?

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The master database has a mixed data and log on the master device, when it is created. The transaction log is the syslogs table you are referring to, as shown in the example below:

  • sp_helpdb master
  • go

    name db_size owner dbid created status
    master 100.0 MB sa 1 Jan 15, 2006 mixed log and data

    (1 row affected)


    device_fragments size usage created free kbytes
    master 52.0 MB data and log Jan 15 2006 1:53AM 36912
    master 48.0 MB data and log Jan 15 2006 1:53AM 48960

Syslogs is not a normal table. To get rid of an unwanted transaction in the master database, you can do the following:

dump transaction master with truncate_only

Alternately, you can increase the size of the master database on master device if you have free space in master device:

  1. sp_helpdevice master
  2.  go device_name physical_name description

     master /data2/lon_gen_sql_tst4/master.dat special dsync on directio off default disk physical disk 256.00 MB Free: 120.00 MB

So, in the above example, I have 120MB free on the master device. If I want to expand the master database on the master device by 10MB, I can simply do the following:

  1. alter database master on master = 10
  2. go
    Extending database by 1280 pages (10.0 megabytes) on disk master

This was first published in January 2006

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