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Compacting the Outlook.pst file ...

Old 04-25-06, 10:47 PM
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Compacting the Outlook.pst file ...

How often do you do that? I hadn't done it in ... actually, I've never done it until today. When I was doing my weekly backup, I noticed that Outlook.pst file was over 110 MB. I wasn't sure why that was the case since I usually delete the e-mails with the huge attachments after I download the attachments. So I googled Outlook.pst size and learned about compacting.

After compacting the file, it's down to 60 MB. And after I deleted some other unnecessary files, Outlook.pst is now down to 29 MB.
Old 04-26-06, 02:48 AM
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I hope to DEAR GOD you can uncompact the pst file. I've always feared doing this and as such, I've backed up my 200MB pst file to a few cds.
Old 04-26-06, 09:21 AM
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Why would you want to uncompact the pst file??
Old 04-26-06, 11:23 AM
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110 MB PST file?

Pshaw! I have a user at work with a 7GB PST.
Old 04-26-06, 03:34 PM
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Originally Posted by Nazgul
Pshaw! I have a user at work with a 7GB PST.
Man, that's probably 3/4 the US population worth of contacts and appointments!
Old 04-26-06, 04:09 PM
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Originally Posted by gongon78
Man, that's probably 3/4 the US population worth of contacts and appointments!
The best part is that he has it labeled as "Deleted_Items".
Old 04-26-06, 05:15 PM
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Originally Posted by Nazgul
110 MB PST file?

Pshaw! I have a user at work with a 7GB PST.
Outlook 2003? i thought with the older versions anything over 2GB taking a big risk?
Old 04-26-06, 08:05 PM
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Originally Posted by al_bundy
Outlook 2003? i thought with the older versions anything over 2GB taking a big risk?
2GB is what Microsoft has stated as the functional limit, but I know from experience that anything over 1GB can get buggy and cause performance issues. Works fine for a while but then really gets slow and can hang for long periods of time. I have a few 800MB .PSTs on my work email and no issues.
Old 04-26-06, 10:07 PM
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Originally Posted by al_bundy
Outlook 2003? i thought with the older versions anything over 2GB taking a big risk?
Correct. It's getting out of hand. 150GB worth of PST files on our network.
Old 04-26-06, 11:26 PM
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Originally Posted by Nazgul
110 MB PST file?

Pshaw! I have a user at work with a 7GB PST.
well, now i don't feel so bad. my pst file is 2.5gb.
Old 04-27-06, 02:47 AM
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Why wouldn't someone compact the pst file? I had the exact same content before and after compacting, and I reduced the filesize from 110 MB to 60 MB.
Old 04-27-06, 10:09 AM
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Originally Posted by namja
Why wouldn't someone compact the pst file? I had the exact same content before and after compacting, and I reduced the filesize from 110 MB to 60 MB.
Compacting PST files is not the same as making it for instance in a ZIP file.

When you delete emails, they are often not really deleted from the PST file, but "flagged" off, so they don't show up anymore.

When you compact the PST file, some internal household-tasks and cleanup tasks are done on the PST file, one of them being actually deleting emails that have been flagged for deletion.

That's why your PST can shrink significantly, while keeping the same content. There is no need to uncompact a PST file, as there is no such function.

This is from memory, so I am sure that the actual compaction procedure works different from what I describe, but the idea remains.
Old 04-27-06, 10:22 AM
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Originally Posted by LolaRennt
When you compact the PST file, some internal household-tasks and cleanup tasks are done on the PST file, one of them being actually deleting emails that have been flagged for deletion.
That's exactly what I figured might be happening.

So again I ask, why would someone not compact the PST file? It saves HD space, it speeds up Outlook, it has less chance of corruption, etc.
Old 04-27-06, 10:27 AM
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About 1G here. I need to do some major cleaning but just have not had the time. I have had it to nearly 3G with no problems.

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