XADM: High Store.exe CPU Utilization During IS Maintenance

This article was previously published under Q159297
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A single thread in the Store.exe process is utilizing 90%-100% of the CPUprocessor time. This high utilization coincides with the start of MicrosoftExchange Information Store (IS) Maintenance window (as configured by the ISMaintenance Schedule) and does not stop unless the Information Store Serviceis cycled or the computer itself is cycled.
One of the checks during the IS Maintenance schedule is that of PublicFolder expires. During the IS maintenance run, the System (or Site) Foldersare also checked. These include the Offline Address Book, the Schedule+ FreeBusy folder, and the Organization Forms. In particular, the Schedule+ FreeBusy folder has a default 7 day expiry on it so it is checked during theexpiry period of IS Maintenance. The function performing the expiry check onthe Schedule+ Free/Busy folder encounters a second copy of the folder in thedeleted folders table and this causes the function to remain in a tight loopcausing the high CPU utilization.
To resolve this issue a rebuild of the Site folders is necessary. Torebuild the Site folders, follow these steps:
  1. Obtain a copy of the utility Guidgen.exe. This utility is available in the Microsoft Developers Network under the product samples. If you do not have access to this utility, Contact Microsoft Product Support Services. The Guidgen utility will randomly generate a globally unique identifier (UID) that will be used to rebuild the site folders.
  2. Run Guidgen and select Option 4, Registry Format.
  3. Click New GUID.
  4. Copy or write down the new GUID number from the RESULT box. This number is needed in Step 10.
  5. Run the Microsoft Exchange Administrator program in "raw" mode. To dothis, go to the command line, change to the Exchsrvr\Bin directory, and type admin /r.
  6. Select the Configuration container of the Site you want to rebuild and highlight the Information Store Site Configuration object.
  7. Select File, Raw Properties.
  8. In the Object Attributes window, scroll down to the Site Folder GUID attribute and select it.
  9. Click Editor.
  10. Replace the existing GUID number with the one generated in Step 2 (the value should be entered in hexadecimal) and then click OK.
  11. Click the SET button. After doing this, make sure the Edit Value and Attribute Value are the same.
  12. Click OK to close the dialog box.
  13. Stop and restart the Information Store service with the Networks toolin Control Panel.
The re-creation of the Site folders will delete any existing content. Tore-populate the Site folders with data see below:

Repopulating the Site Folders with Data

Offline Address Book

To repopulate the offline address book Site Folder:
  1. Run the Microsoft Exchange Administrator program.
  2. Select the Configuration container and get the Properties on the DS Site Configuration object.
  3. Click the Offline Address Book tab and click Generate Offline Address Book Now.

Schedule+ Free Busy Information

The Schedule+ Free Busy Information Site Folder will be repopulated asusers log on to Schedule+ and generate changes. During this period someusers' Free Busy information will be temporarily unavailable.

Organizational Forms

If there was an Organizational Forms Site Folder, it must be re-createdusing the Microsoft Exchange Administrator program.
  1. Run the Microsoft Exchange Administrator program.
  2. Click Tools, click Forms Administrator and click New.

Article ID: 159297 - Last Review: 10/04/2013 16:48:34 - Revision: 3.3

Microsoft Exchange Server 4.0 Standard Edition

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