I don't keep up with this list well enough to know whether anyone else answered. I don't know how to do it in jetty.xml, but you can certainly tweak the code. java.net.Socket has a method setTcpNoDelay() that corresponds with the standard Unix system calls.
Long-time past, my suggestion of this made Apache Axis 2.0 250ms faster per call (1). Now I want to know whether Apache Solr sets it. One common way to test the overhead portion of latency is to project the latency for a zero size request based on larger requests. What you do is to "warm" requests (all in memory) for progressively fewer and fewer rows. You can make requests for 100, 90, 80, 70 ... 10 rows each more than once so that all is warmed. If you plot this, it should look like a linear function latency(rows) = m(rows) + b since all is cached in memory. You have to control what else is going on on the server to get the linear plot of course - it can be quite hard to get this to work right on modern Linux. But once you have it, you can simply calculate f(0) and you have the latency for a theoretical 0 sized request. This is a tangential answer at best - I wish I just knew a setting to give you. (1) Latency Performance of SOAP Implementations<http://citeseer.ist.psu.edu/viewdoc/similar?doi=10.1.1.21.8556&type=ab> On Sun, Sep 29, 2013 at 9:22 PM, William Bell <billnb...@gmail.com> wrote: > How do I set TCP_NODELAY on the http sockets for Jetty in SOLR 4? > > Is there an option in jetty.xml ? > > /* Create new stream socket */ > > sock = *socket*( AF_INET, SOCK_STREAM, 0 ); > > > > /* Disable the Nagle (TCP No Delay) algorithm */ > > flag = 1; > > ret = *setsockopt*( sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, > sizeof(flag) ); > > > > > -- > Bill Bell > billnb...@gmail.com > cell 720-256-8076 >
