HP Visualize J5000 hp workstations - hp-ux 10.20 graphics administration guide - Page 35
Performance Tuning of SMT, Under most circumstances this should be unnecessary.
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A display name of the form unix:0.0 will force the use of Unix Domain Sockets (UDS), which is identical to the local transport used before HP-UX 10.20. A display name of the form nn.nn.nn.nn:0.0 (where nn.nn.nn.nn is an IP address) will force the use of Internet Sockets, which is the remote transport normally used, and which can be used locally. (This will be slow.) It is possible that an application which violates the X interface standard will run correctly using UDS, but hang or coredump when using SMT. Users encountering this problem can use: DISPLAY=unix:0 to run the application compatibly, but without the performance improvement of SMT Note: If neither SMT nor UDS are desired, setting XFORCE_INTERNET=True before starting the X server forces all protocol to interact directly with the hardware internet card Performance Tuning of SMT The default values of some buffer sizes have been tuned for optimal performance in most situations. However, these are not necessarily optimal in all conditions. Under some circumstances system performance might be optimized (possibly at the expense of X performance) by tuning these parameters. Under most circumstances this should be unnecessary. The Server accepts these parameters via the X*screens file, in the ServerOptions section. In this case, the default for all SMT connections is set. Such a specification in the X*screens file might appear as: ServerOptions SMTSizes 100000,90000,90000 The client accepts these parameters via the environment variable X_SMT_SIZES. For the client, the value affects all client connections to the server made while this environment variable is set. Page 35 Graphics Administration Guide for HP-UX 10.20