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Lori MacVittie

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1024 Words: SEND Buffers and Concurrent Connections

#devops #webperf #ado The relationship between SEND buffers and concurrent connections

The send buffer setting is the maximum amount of data a system will send before receiving an acknowledgement, and the receive window setting is the maximum size window the system will advertise.

Many folks tweak the send buffer settings on web and application servers as well as intermediate devices (proxies, load balancers, etc...) to optimize for high-speed, high-latency pipes. However, as this is often a system-wide configuration change, mucking with the SEND buffer sizes can directly impact the connection capacity of the system. Remember, "buffering" takes up memory, and so do connections (session and state table storage),

 

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Lori MacVittie is responsible for education and evangelism of application services available across F5’s entire product suite. Her role includes authorship of technical materials and participation in a number of community-based forums and industry standards organizations, among other efforts. MacVittie has extensive programming experience as an application architect, as well as network and systems development and administration expertise. Prior to joining F5, MacVittie was an award-winning Senior Technology Editor at Network Computing Magazine, where she conducted product research and evaluation focused on integration with application and network architectures, and authored articles on a variety of topics aimed at IT professionals. Her most recent area of focus included SOA-related products and architectures. She holds a B.S. in Information and Computing Science from the University of Wisconsin at Green Bay, and an M.S. in Computer Science from Nova Southeastern University.