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Measures reported by XchgStoreGroupTest
A Storage Group will contain one or more Mailbox and Public Folder stores, depending on the version and the needs of the organization. Mailbox stores contain the user and system mailboxes and the Public Folder Store contains the Public Folders and their contents.
A default Exchange installation will create a Storage Group that contains a Mailbox Store and a Public Folder Store. Each Mailbox Store is made up of a database set that contains two files:
- Priv1.edb is a rich-text database file that contains the email messages, text attachments and headers for the users e-mail messages
- Priv1.stm is a streaming file that contains multi-media data that is formatted as MIME data.
Similarly, each Public Folder Store is made up of a database set that also contains two files:
- Pub1.edb is a rich-text database file that contains the messages, text attachments and headers for files stored in the Public Folder tree.
- Pub1.stm is a streaming file that contains multi-media data that is formatted as MIME data
For every EDB file there will be an associated STM file.
The XchgStoreGroupTest periodically observes the fluctuations in the store group size and the size of the mailbox and public folder stores within. Using the statistics reported by this test, administrators can effectively analyze and accurately predict growth trends and its implications on server performance; based on these inferences, administrators can even initiate, if required, measures to reconfigure the store group so as to prepare it for handling any additional load that is anticipated.
| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Mailbox_store_size |
The current size of the mailbox stores within this store group
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MB
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The detailed diagnosis of this measure, if enabled, reveals the size of the EDB and STM files within each mailbox store of the monitored store group. A look at this break-up is recommended when the value of this measure shows sudden/steady increase; with the help of this detailed diagnosis information, you can quickly determine the root-cause of the anomaly - is it the EDB file or the STM file? If the database size appears to be growing continuously, you might want to consider splitting one large database into multiple smaller databases so as to ease management.
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| Public_folder_store_size |
The current size of the public folder stores within this store group
|
MB
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The detailed diagnosis of this measure, if enabled, reveals the size of the EDB and STM files within each public folder store of the monitored store group. A look at this break-up is recommended when the value of this measure shows sudden/steady increase; with the help of this detailed diagnosis information, you can quickly determine the root-cause of the anomaly - is it the EDB file or the STM file? If the database size appears to be growing continuously, you might want to consider splitting one large database into multiple smaller databases so as to ease management.
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| Total_storage_group_size |
The total size of this store group
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MB
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This, in effect, is a sum of the Mailbox_store_size and Public_folder_store_size measures. If you find the value of this measure increasing consistently, you might want to create additional storage groups so that the load is balanced across the groups. On an Exchange 2003 server for instance, up to 4 store groups can be created. Alternatively, you might also want to consider splitting one large database into multiple smaller databases so as to ease management.
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