| Event Id | 623 |
| Source | ESE |
| Description | Information Store (2048) The version store for instance 0 ("c49a179d-ac1f-4894-8211-0c2917d34500") has reached its maximum size of 108Mb. It is likely that a long-running transaction is preventing cleanup of the version store and causing it to build up in size. Updates will be rejected until the long-running transaction has been completely committed or rolled back. Possible long-running transaction: SessionId: 0x1B6525A0 Session-context: 0x00000000 Session-context ThreadId: 0x00000AF8. |
| Event Information | According to Microsoft: Internet e-mail messages are typically structured in MIME format. In some cases, Exchange Server must convert MIME messages to MAPI format. For Post Office Protocol version 3 (POP3) or Internet Message Access Protocol, version 4rev1 (IMAP4) clients to gain access to that e-mail, the MAPI-formatted content must be converted back to MIME format before the clients can log on. This conversion allows the exact message size to be calculated, although the MIME-converted content is not persisted in the database. If the file is larger than 4 kilobytes (KB), the mail cannot be converted in memory. Therefore, Exchange 2000 writes a temporary file to the Windows Tmp folder. Mail is converted to MAPI during the following operations: 1. A move-mailbox procedure 2. Public folder replication This may cause POP3 and IMAP4 clients to experience long delays during logon. In some cases, without proper planning or available server resources, this conversion to MAPI may also cause system latencies. |
| Reference Links | Client latencies occur when Exchange 2000 Converts Mail from MAPI to MIME format XCCC: The Instant Messaging Service Stops Responding When the ESE Version Store Reaches the Maximum Value A Windows 2000 Server-based computer may stop responding when you are running Exchange 2000 Server XADM: Error with Event ID 623 Occurs When Client Computers Try to Connect to the Information Store XADM: Some Exchange 2000 Users Cannot Access the Inbox You may experience slow client performance if the version store runs out of memory in Exchange 2000 Server The Microsoft Exchange Information Store Service may intermittently stop responding during database transactions and an event ID 623 message may be logged in Exchange 2000 Server You may experience slow client performance if the version store runs out of memory in Exchange Server 2003 Information Store Dismounts and Stops |
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