Re: Microsoft office 2007 ost limit.
Thanks Michael, That info was helpful. David From: Michael B. Smith mich...@smithcons.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Fri, May 14, 2010 11:22:30 AM Subject: RE: Microsoft office 2007 ost limit. The changes in Outlook 2007 SP2 were backported from Outlook 2010. They have the same performance profile. OSTs up to 100 GB were tested. However, you need to have memory and fairly fast disk. The OST format is disk intensive. [ These are from public comments made by Microsoft personnel. Don’t ask me for references. J] Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From:Joe Pochedley [mailto:joe.poched...@fivesgroup.com] Sent: Friday, May 14, 2010 2:08 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. I’m not sure you’re going to find anyone here who can give you a definitive answer that OST’s are OK at X gigabytes, but start to blow up at X+1 gigabytes… Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both… I can’t say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I’m not sure what tweaks they’ve made to the OST format in 2010… Whether the change means anything to an OST under 2007, again I can’t say. What *I* can tell you is that I have some users with OST’s that are near the 20GB limit on Office 2007. I’ve never once had a problem with the OST file itself. Even if I did, I’d just delete the OST, tell the user to clean up their mailbox and then re-download from the server… Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From:David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From:Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From:David Baca To:MS-Exchange Admin Issues Sent:Thursday, May 13, 2010 12:53 PM Subject:Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
Re: Microsoft office 2007 ost limit.
thank you everyone for your feedback. i guess i knew there was no clear answer but I wanted to see if someone has pushed past the 20 GB barrier and had any issues. From: Joe Pochedley joe.poched...@fivesgroup.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Fri, May 14, 2010 11:57:11 AM Subject: RE: Microsoft office 2007 ost limit. I concur… One of our users with a 19.8 GB mailbox had a P4/3.0 Ghz with 1GB of RAM and a 5400 RPM HD. Switching folders in Outlook was horrible. Just last week I gave him a Core2/Duo with 3 GB of RAM. Outlook runs MUCH better now. JP From:Bob Fronk [mailto:b...@btrfronk.com] Sent: Friday, May 14, 2010 2:39 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. snip I have another user with an 18GB OST with over 15,000 items in his inbox (not in folders). The machine specs are very good, so Outlook performs fine, however, I have warned him of the inevitable. BF From:Joe Pochedley [mailto:joe.poched...@fivesgroup.com] Sent: Friday, May 14, 2010 2:08 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. I’m not sure you’re going to find anyone here who can give you a definitive answer that OST’s are OK at X gigabytes, but start to blow up at X+1 gigabytes… Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both… I can’t say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I’m not sure what tweaks they’ve made to the OST format in 2010… Whether the change means anything to an OST under 2007, again I can’t say. What *I* can tell you is that I have some users with OST’s that are near the 20GB limit on Office 2007. I’ve never once had a problem with the OST file itself. Even if I did, I’d just delete the OST, tell the user to clean up their mailbox and then re-download from the server… Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From:David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From:Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From:David Baca To:MS-Exchange Admin Issues Sent:Thursday, May 13, 2010 12:53 PM Subject:Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
RE: Microsoft office 2007 ost limit.
I'm not sure you're going to find anyone here who can give you a definitive answer that OST's are OK at X gigabytes, but start to blow up at X+1 gigabytes... Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both... I can't say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I'm not sure what tweaks they've made to the OST format in 2010... Whether the change means anything to an OST under 2007, again I can't say. What *I* can tell you is that I have some users with OST's that are near the 20GB limit on Office 2007. I've never once had a problem with the OST file itself. Even if I did, I'd just delete the OST, tell the user to clean up their mailbox and then re-download from the server... Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From: David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From: Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From: David Bacamailto:dbaca.gr...@yahoo.com To: MS-Exchange Admin Issuesmailto:exchangelist@lyris.sunbelt-software.com Sent: Thursday, May 13, 2010 12:53 PM Subject: Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.comhttp://www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
RE: Microsoft office 2007 ost limit.
The changes in Outlook 2007 SP2 were backported from Outlook 2010. They have the same performance profile. OSTs up to 100 GB were tested. However, you need to have memory and fairly fast disk. The OST format is disk intensive. [ These are from public comments made by Microsoft personnel. Don't ask me for references. :) ] Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: Joe Pochedley [mailto:joe.poched...@fivesgroup.com] Sent: Friday, May 14, 2010 2:08 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. I'm not sure you're going to find anyone here who can give you a definitive answer that OST's are OK at X gigabytes, but start to blow up at X+1 gigabytes... Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both... I can't say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I'm not sure what tweaks they've made to the OST format in 2010... Whether the change means anything to an OST under 2007, again I can't say. What *I* can tell you is that I have some users with OST's that are near the 20GB limit on Office 2007. I've never once had a problem with the OST file itself. Even if I did, I'd just delete the OST, tell the user to clean up their mailbox and then re-download from the server... Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From: David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From: Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From: David Bacamailto:dbaca.gr...@yahoo.com To: MS-Exchange Admin Issuesmailto:exchangelist@lyris.sunbelt-software.com Sent: Thursday, May 13, 2010 12:53 PM Subject: Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.comhttp://www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
RE: Microsoft office 2007 ost limit.
Currently I have no mailbox size limits on 250+ users (This is being resolved soon!) Many users have 15GB or higher OST files and we have not really had any issues. I did have a user with an 18GB OST which became corrupt following a user impatience issue (power off without shutdown) and Outlook would not start afterward. The fix was a new Outlook profile and allow cached mode to rebuild the OST. I have another user with an 18GB OST with over 15,000 items in his inbox (not in folders). The machine specs are very good, so Outlook performs fine, however, I have warned him of the inevitable. BF From: Joe Pochedley [mailto:joe.poched...@fivesgroup.com] Sent: Friday, May 14, 2010 2:08 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. I'm not sure you're going to find anyone here who can give you a definitive answer that OST's are OK at X gigabytes, but start to blow up at X+1 gigabytes... Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both... I can't say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I'm not sure what tweaks they've made to the OST format in 2010... Whether the change means anything to an OST under 2007, again I can't say. What *I* can tell you is that I have some users with OST's that are near the 20GB limit on Office 2007. I've never once had a problem with the OST file itself. Even if I did, I'd just delete the OST, tell the user to clean up their mailbox and then re-download from the server... Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From: David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From: Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From: David Bacamailto:dbaca.gr...@yahoo.com To: MS-Exchange Admin Issuesmailto:exchangelist@lyris.sunbelt-software.com Sent: Thursday, May 13, 2010 12:53 PM Subject: Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.comhttp://www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
Re: Microsoft office 2007 ost limit.
snip I did have a user with an 18GB OST which became corrupt following a user impatience issue (power off without shutdown) and Outlook would not start afterward. The fix was a new Outlook profile and allow cached mode to rebuild the OST. How long did THAT take? Was it on remote machine via Outlook Anywhere on a 512k DSL connection? :-)
RE: Microsoft office 2007 ost limit.
Yes, the user was at a remote office. Fortunately, our WAN port at that site is 6mbps. I don't know how long it actually took to get all folders up to date, but I am sure it was a while! From: Richard Stovall [mailto:rich...@gmail.com] Sent: Friday, May 14, 2010 2:46 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. snip I did have a user with an 18GB OST which became corrupt following a user impatience issue (power off without shutdown) and Outlook would not start afterward. The fix was a new Outlook profile and allow cached mode to rebuild the OST. How long did THAT take? Was it on remote machine via Outlook Anywhere on a 512k DSL connection? :-)
RE: Microsoft office 2007 ost limit.
I concur... One of our users with a 19.8 GB mailbox had a P4/3.0 Ghz with 1GB of RAM and a 5400 RPM HD. Switching folders in Outlook was horrible. Just last week I gave him a Core2/Duo with 3 GB of RAM. Outlook runs MUCH better now. JP From: Bob Fronk [mailto:b...@btrfronk.com] Sent: Friday, May 14, 2010 2:39 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. snip I have another user with an 18GB OST with over 15,000 items in his inbox (not in folders). The machine specs are very good, so Outlook performs fine, however, I have warned him of the inevitable. BF From: Joe Pochedley [mailto:joe.poched...@fivesgroup.com] Sent: Friday, May 14, 2010 2:08 PM To: MS-Exchange Admin Issues Subject: RE: Microsoft office 2007 ost limit. I'm not sure you're going to find anyone here who can give you a definitive answer that OST's are OK at X gigabytes, but start to blow up at X+1 gigabytes... Whether Microsoft set the default maximum based on performance concerns, or file stability concerns; or neither; or both... I can't say. Seeing how Microsoft increases the default max OST size to 50GB in Office 2010 should tell you they feel comfortable supporting up to a 50GB OST. I'm not sure what tweaks they've made to the OST format in 2010... Whether the change means anything to an OST under 2007, again I can't say. What *I* can tell you is that I have some users with OST's that are near the 20GB limit on Office 2007. I've never once had a problem with the OST file itself. Even if I did, I'd just delete the OST, tell the user to clean up their mailbox and then re-download from the server... Outlook performance certainly does suffer if the PC is not up to the task of handling the large OST though. Joe P From: David Baca [mailto:dbaca.gr...@yahoo.com] Sent: Thursday, May 13, 2010 7:36 PM To: MS-Exchange Admin Issues Subject: Re: Microsoft office 2007 ost limit. It tells me how to set the max but it doesn't say what the maximum allowed is before it becomes unstable. Some would argue that 20 GB is the max. but I wanted to see if anyone has pushed the envelope. From: Orland, Kathleen korl...@rogers.com To: MS-Exchange Admin Issues exchangelist@lyris.sunbelt-software.com Sent: Thu, May 13, 2010 10:07:14 AM Subject: Re: Microsoft office 2007 ost limit. Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From: David Bacamailto:dbaca.gr...@yahoo.com To: MS-Exchange Admin Issuesmailto:exchangelist@lyris.sunbelt-software.com Sent: Thursday, May 13, 2010 12:53 PM Subject: Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.) No virus found in this incoming message. Checked by AVG - www.avg.comhttp://www.avg.com Version: 9.0.819 / Virus Database: 271.1.1/2872 - Release Date: 05/13/10 14:26:00
Microsoft office 2007 ost limit.
I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.)
Re: Microsoft office 2007 ost limit.
Have you read this? http://support.microsoft.com/kb/832925 Kathleen Orland - Original Message - From: David Baca To: MS-Exchange Admin Issues Sent: Thursday, May 13, 2010 12:53 PM Subject: Microsoft office 2007 ost limit. I was wondering if anyone could tell me if they have ever increased this ost file limit and what is the maximum limit is for a 2007 ost file (i know 20 GB is the default limit but I want to find out what the recommended maximum is without corruption of the ost file.)
