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HP OpenVMS Systemsask the wizard |
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The Question is: Hi! I have installed CSWS 1.2 on my Alpha server. Actualy I replaced Purveyor with CSWS. CSWS server's response is 2-3 times worse than Purveyor's. Are there any performance tuning guidelines available? I consider guidelines in CSWS documentation, but is ther e something more? The Answer is : It is obviously quite difficult address performance problems without substantially more information and without performance data, but the OpenVMS Wizard will hazard guesses. The following are two of various performance-relevent considerations that exist for Apache (and CSWS): 1. Enabling SSL adds considerable overhead during process startup for Apache (and CSWS). If SSL is enabled but not needed, then disable it. 2. Apache (and CSWS) uses a "pre-forked" process model. This means it creates and maintains a pool of available server processes, and then dispatches incoming HTTP requests to these processes. Apache (and CSWS) also strives to maintain a minimum number of idle server processes (MinSpareServers) that will be available to handle additional load. Further, as webserver load decreases, Apache (and CSWS) will delete idle server processes until the maximum number of idle server processes (MaxSpareServers) is reached. OpenVMS process creation is relatively expensive when compared to UNIX process creation, so one obvious approach involves increasing the number of servers that are started initially (StartServers) and set the MaxSpareServers value to reasonably reflect the number of incoming requests you expect the webserver to encounter on average. For example: StartServers 20 MinSpareServers 5 MaxSpareServers 30 Twenty server processes will be initially started, five idle server processes will be kept as available as the load increases, and up to thirty idle server processes will be maintained. And as a general rule, please ensure that you have the current version of Apache (and CSWS) loaded and running.
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