Configure the MaximumLogSize Setting
Meridian maintains a transaction log file for each vault database (HyperCache only) that contains all changes made to the vault since the log was last committed to the database and a snapshot was created. When the size of the log reaches the value of MaximumLogSize (in MB) and the amount of time specified by the MinimumSnapshotInterval setting has elapsed, the log is committed to the database and a new snapshot is created. The MaximumLogSize setting can be used to limit the size of the log file so that the data is committed to the database after predictable amounts of work have been performed in the vault without adversely affecting performance.
This setting works together with the MinimumSnapshotInterval (in minutes) setting. For example, if MaximumLogSize is set to 8 (default) and MinimumSnapshotInterval is set to 240 (default), when the log file reaches 8 MB no snapshot will be created unless 240 minutes (4 hours) has elapsed since the last snapshot. Likewise, if 240 minutes (4 hours) has elapsed since the last snapshot, a new snapshot will not be created until the log file size is at least 8 MB. We recommend that you use the default settings under most circumstances. The MaximumCacheSize and RelativeCacheSize settings are more effective for optimizing performance.
Whenever a Prepare for Backup operation occurs, the log is committed to the database and a new snapshot is created.
To configure the MaximumLogSize setting:
- In Administrator, click EDM Server in the left pane. The list of active vaults appears in the right pane.
- Select the vault that you want to configure in the right pane.
- On the Action menu and select Properties. The vault’s Properties dialog box appears.
- Click the Advanced button. The Advanced Vault Properties dialog box appears.
- Adjust the MaximumLogSize setting (in MB) and click OK.
This setting can also be configured with the MaximumLogSize registry key located at:
HKEY_LOCAL_MACHINE\SOFTWARE\Cyco\AutoManager Meridian\CurrentVersion\Installed DataStores\<VaultName>\CompoundItemService
To temporarily disable snapshot file creation during large batch operations, create a AllowSnapShot DWORD registry value on the Meridian application server at the same registry key. Set AllowSnapShot to 0 to disable creation of new snapshots. Set it to 1 to enable creation of new snapshots. After setting the registry value, stop and restart the AutoManager EDM Server service for the setting to take effect. Then begin the batch operation. When the batch operation has completed, change the value of AllowSnapShot to 1 and restart the service again so that normal snapshot file creation will resume.
