Blackberry PROFESSIONAL SOFTWARE FOR MICROSOFT EXCHANGE Administration Manual page 43

Administration Guide
Attachment Service deletes the document with the oldest time stamp in the cache. When users request to view an attachment
on their BlackBerry devices, the BlackBerry Attachment Service accesses the DOM to process the request. The BlackBerry
Attachment Service keeps all cached data in memory only and never caches the original document.
1. On the server that hosts the BlackBerry Professional Software, on the taskbar, click Start > BlackBerry Server
Configuration.
2. Click the Attachment Server tab.
3. In the Configuration Option drop-down list, click Attachment Server.
4. Perform any of the following tasks:
Task
Prevent multiple requests for the same attachment from
using the first cached copy of the attachment DOM in a
conversion process for a user.
Configure the maximum number of converted documents
that can be located in the document cache as DOM for an
individual conversion process.
Configure the number of conversion requests that the
BlackBerry Attachment Service can process concurrently.
Configure the value in relation to the available memory
and competing services on the computer.
Configure the number of documents that the BlackBerry
Attachment Service can convert concurrently in a single
conversion process. Use this setting to control thread
saturation and to manage the BlackBerry Attachment
Service workload with the Busy Threshold (seconds)
setting.
Configure a limit for the time in which an application
conversion process can reuse system resources to reclaim
space and prevent failed processes from keeping memory.
Configure the threshold to determine whether the
BlackBerry Attachment Service is busy with conversions
and should not accept new requests.
Optimize the handling of file attachments
Steps
> In the Concurrent Caching drop-down list, click
Disabled.
By default, the BlackBerry Attachment Service maintains
the cache for 25 minutes or until a new request exceeds
the cache limit for that process. If the cache limit is
exceeded, the BlackBerry Attachment Service deletes the
document with the oldest time stamp in the cache.
> In the Document Cache Size (docs) field, type a value
between 1 and 128.
> In the Conversion Processes field, type a value between 1
and 64.
> In the Max. Threads Per Process field, type a value
between 2 and 32.
> In the Recycle Time(s) (seconds) field, type a time
between 300 and 3600 seconds.
> In the Busy Threshold(s) (seconds) field, type a time
between 60 and 270 seconds.
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