Online Defragmentation

[johnisotank]

Hi All,

I'm not sure if we have a problem with the Online Defragmentation for Exchange but I would appreciate some advice as to what may be wrong.

Our Priv1.edb file has a maintenance interval 'Run Daily from 1AM to 5AM'

And (apologies for the amount of text) here are the event logs for that database during the night..

01:00:02

Information Store (408) First Storage Group: Online defragmentation is resuming its pass on database 'D:\Shared\Exchange\mdbdata\priv1.edb'.

02:43:42

Information Store (408) First Storage Group: Online defragmentation has completed the resumed pass on database 'D:\Shared\Exchange\mdbdata\priv1.edb'.

02:44:32

Information Store (408) First Storage Group: Online defragmentation is beginning a full pass on database 'D:\Shared\Exchange\mdbdata\priv1.edb'.

06:00:00

Information Store (408) First Storage Group: Online defragmentation of database 'D:\Shared\Exchange\mdbdata\priv1.edb' was interrupted and terminated. The next time online defragmentation is started on this database, it will resume from the point of interruption.

06:00:00

The database "First Storage Group\Mailbox Store (ISOSBS)" has 2648 megabytes of free space after online defragmentation has terminated.

Something is clearly stopping the defragmentation. Does anyone have any advice? I am using Exec Backup and the backup usually finished around 11PM.

Thanks for any help.

 

[zbnet]

Why do you think something is stopping the defrag process? It will run within the schedule you set, and at the end of the time slot, defrag stops and 'remembers' where it was up to. The next night, at 1am (or whenever you set the schedule to start) it resumes from the place in the DB where it last got to (that's the initial resume you see).

It appears that the full pass completes at 2:43, and because this is still within the schedule wndow, it will start another pass at the beginning of the DB - which is exactly what you're seeing.

Everythign looks perfectly healthy to me.

 

[johnisotank]

Hi, thanks a lot for the reply.

the phrase 'was interrupted and terminated' made me think something was going wrong but your explanation makes perfect sense and I understand how that works now.

It is basically saying the maintenance interval has finished and will resume tomorrow at the scheduled time.

Thanks very much
John