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HP-UX Reference > Ttcphashsz(5)Tunable Kernel ParametersHP-UX 11i Version 2: December 2007 Update |
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NAMEtcphashsz — determines the size of the networking hash tables DESCRIPTIONThis variable is used to set the size of the networking hash tables. A system that is going to have a large number of connections on it all of the time may see some benefit of increasing this value. This tunable needs to be a power of two. If it is not specified as a power of two, then it is rounded down to the nearest power of two. When Should the Value of This Tunable Be Raised?This value may be raised in the case of a machine with a large number of connections that last for an extended period of time. When Should the Value of This Tunable Be Lowered?If a system is tight on memory and it has just a few connections on it, then lowering the value may reclaim some memory. WARNINGSAll HP-UX kernel tunable parameters are release specific. This parameter may be removed or have its meaning changed in future releases of HP-UX. Installation of optional kernel software, from HP or other vendors, may cause changes to tunable parameter values. After installation, some tunable parameters may no longer be at the default or recommended values. For information about the effects of installation on tunable values, consult the documentation for the kernel software being installed. For information about optional kernel software that was factory installed on your system, see HP-UX Release Notes at http://docs.hp.com. |
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