Some systems allow you to configure the interval between transmission of keepalive packets. This setting can determine how long a TCP connection is maintained while inactive and potentially disconnected. When set too high, the keepalive interval can cause the system to use unnecessary resources to keep connections for clients that have become disconnected. For most deployments, set this parameter to a value of 600 seconds. This value, which is 600,000 milliseconds, or 10 minutes, allows more concurrent connections to Directory Server.
When set too low, however, the keepalive interval can cause the system to drop connections during transient network outages.
On Solaris systems, this time interval is configured through the tcp_keepalive_interval parameter.