Hi,
Sorry for the delayed response on this one. Here are how these two params are used:
ClientSideBuffer – This is used when an RTMP/Flash client is requesting a VOD file. It is measured in seconds and is the amount of the file the EvoStream Media Server will send in advance to the client to ensure the client always has enough video to play.
maxRTMPOutBuffer – This is used when the consumer (client/player/etc) is slower than the producer (source stream). It is measured in bytes and is the amount of data the EvoStream Media Server will maintain for the client before dropping packets.
So given your situation, what you want is the maxRTMPOutBuffer.