Reducing buffer usage for TCP proxy session based on delayed acknowledgement

A non-transitory computer readable medium with computer readable program code embodied therewith for reducing buffer usage for a Transmission Control Protocol (TCP) proxy session between a client and a server by adjusting server side session transmission time to reduce buffer usage, the computer readable program code configured to:

• periodically monitor performance of a TCP session using round trip time (RTT) for the TCP session including a server side TCP session and a client side TCP session;
• determine a first round trip time (RTT) for the server side TCP session of the TCP proxy session between a service gateway and the server;
• determine a second RTT for the client side TCP session of the TCP proxy session between the service gateway and the client that is based at least on one or more prior client side TCP sessions with the client, the service gateway comprising a processor, a memory module, and a server side receive buffer residing in the memory module;
• compare the first RTT with the second RTT by the service gateway;
• determine that the second RTT exceeds the first RTT;
• in response to determining that the second RTT exceeds the first RTT, calculate a desired RTT based on the second RTT, wherein the desired RTT is calculated as a percentage of the second RTT or as the second RTT minus a predetermined value;
• and
• set a timer by the service gateway according to the calculated desired RTT and schedule a TCP acknowledgement data packet to be sent at a later time, using the timer, wherein the TCP acknowledgement for the server side TCP session is delayed until the service gateway determines that the timer expires.

A system for reducing buffer usage for a Transmission Control Protocol (TCP) proxy session between a client and a server by adjusting server side session transmission time to reduce the buffer usage, the system comprising:

• a service gateway comprising a processor, a memory module, and a server side receive buffer residing in the memory module, wherein a server side TCP session of the TCP proxy session is established between the service gateway and the server, and a client side TCP session of the TCP proxy session is established between the service gateway and the client, wherein the service gateway:
• periodically monitors performance of the TCP proxy session using a round trip time (RTT) including RTT for the server side TCP session and the client side TCP session;
• determines a first round trip time (RTT) for the server side TCP session of the TCP proxy session between the service gateway and the server;
• determines a second RTT for the client side TCP session of the TCP proxy session between the service gateway and the client wherein the second RTT is based at least on one or more prior client side TCP sessions with the client;
• compares the first RTT with the second RTT;
• determines that the second RTT exceeds the first RTT;
• in response to determining that the second RTT exceeds the first RTT, calculates a desired RTT based on the second RTT, wherein the desired RTT is a percentage of the second RTT or the second RTT minus a predetermined value;
• and
• sets a timer according to the calculated desired RTT and schedules a TCP acknowledgement data packet to be sent at a later time, using the timer, wherein the TCP acknowledgement for the server side TCP session is delayed until the timer expires.