RetryInterval setting

There is a setting in the plug-in configuration file that allows you to specify how long to wait before retrying a server that is marked as down. This is useful in avoiding unnecessary attempts when you know that server is unavailable. The default is 60 seconds.

This setting is specified in the ServerCluster element using the RetryInterval attribute. An example of this in the plugin-cfg.xml file is:

<ServerCluster CloneSeparatorChange="false" LoadBalance="Round Robin" 
Name="PluginCluster" PostSizeLimit="-1" RemoveSpecialHeaders="true" 
RetryInterval="120">

This would mean that if a cluster member were marked as down, the plug-in would not retry it for 120 seconds.

There is no way to recommend one specific value; the value chosen depends on your environment. For example, if you have numerous cluster members, and one cluster member being unavailable does not affect the performance of your application, then you can safely set the value to a very high number.

Alternatively, if your optimum load has been calculated assuming all cluster members to be available or if you do not have very many, then you will want your cluster members to be retried more often to maintain the load.

Also, take into consideration the time it takes to restart your server. If a server takes a long time to boot up and load applications, then you will need a longer retry interval.

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