Location : Cleveland, OH
Intermittent issues with a Blackberry Enterprise Server (BES) that required a restart caused me to look at the logs to see if I could determine an underlying issue. Since this site had only one BES, running on Domino, the search through the logs didn't really take a lot of time. Just prior to the server hanging, I saw that one user had sent one large e-mail to quite a few internal recipients, most of them with Blackberry devices. The time consuming part was trying to search the Blackberry and Lotus support sites to find a solution. Patience rewarded me with this Blackberry TechNote:
As the TechNote recommended, the value of DocumentThrottleMaxDocOpen should be between 20-30, so as not to create really noticeable mail delays. We have it set to 20 and are monitoring the users and the server to see if there are any issues. The command to set the value is:
TraitTool.exe -trait DocumentThrottleMaxDocOpen -global -set [value]
Link: How to control the number of concurrent documents that are opened based on UNID
Technorati tag: Show-n-Tell Thursday SnTT Lotus Domino Blackberry Enterprise Server
When a large email message that shares a Universal Identifier (UNID) is sent to multiple BlackBerry enabled recipients with accounts on the same BlackBerry Enterprise Server, an increase in memory usage occurs. This may destabilize the BlackBerry Messaging Agent, requiring that it be restarted.
As the BlackBerry Messaging Agent processes email messages, it requests a copy of the email message from the messaging server. The BlackBerry Messaging Agent is a multi-threaded application that can process more than one email message at the same time. A standard deployment of the BlackBerry Enterprise Server in a 32-bit environment has approximately 2 GBs of addressable memory space. A portion of this memory is reserved for processing messages. Sending a large email message to a large number of BlackBerry smartphone users that are on a single BlackBerry Enterprise server could result in attempts to exceed this portion of memory.
As the TechNote recommended, the value of DocumentThrottleMaxDocOpen should be between 20-30, so as not to create really noticeable mail delays. We have it set to 20 and are monitoring the users and the server to see if there are any issues. The command to set the value is:
TraitTool.exe -trait DocumentThrottleMaxDocOpen -global -set [value]
Link: How to control the number of concurrent documents that are opened based on UNID
Technorati tag: Show-n-Tell Thursday SnTT Lotus Domino Blackberry Enterprise Server
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