Last weekend I tried an offline defragmentation of my now 72,9 GB (edb and stm file combined) large Private mailstore. As I never done it before I went in to it with great expectations. I started the offline defragmentation (with a good back-up of course) at 11pm and I expected to finish around 7am the next morning.
Well that wasn't exactly the case. The defragmentation was still at around 25%. I have to admit that this was with the /d /p options set and the defragmented store was saved on an external harddisk. For the second try I will use and IDE attached harddisk to speed things up.
So i cancelled the defragmentation en mounted the back-up mailstores.
The database physical size is as following:
priv1.edb = 50.001.800kb
priv1.stm = 26.480.648kb
Together the store size is around 73GB. The limit of the database is 75GB. Event id 1221 shows me that there is 9249 megabytes of white space in the database after an online defragmentation.
Now for my question. Is it in this case beneficial to perform an offline defragmentation and how long should I expect it to complete the defragmentation.