SPECweb99 Tuning Disclosure: For Digital UNIX 5.1 -------------------------------------------------- Sysconfigtab Parameters: proc: max-proc-per-user - The maximum limit of processes (tasks) a user can create. Zero indicates unlimited. (The superuser is not affected.) Default value: 64 max-threads-per-user - The maximum limit of threads a user can create. (The superuser is not affected.) Default value: 256 max-per-proc-address-space - max-per-proc-data-size - Maximum values for the current limits of the attributes per-proc-address-space and per-proc-data-size. The current limits can be increased at run time by means of the setrlimit(2) system call or the ulimit(3) C library call. The current limits cannot be expanded beyond the values established by the "max-per-proc-*" attributes. Default value: max-per-proc-address-space = 1073741824 max-per-proc-data-size = 4398046511104 per-proc-address-space - per-proc-data-size - The current upper limits of the respective resources. For example, a user address space cannot exceed the size set by the per-proc-address-space attribute. Default value: per-proc-address-space = 1073741824 per-proc-data-size = 4398046511104 socket: umc - Enables (1) or disables (0) the Unified Mbuf Cache (UMC) Default value: 0 sominconn - Minimum value for socket listen queue length limit (backlog). Silently overrides user-specified backlog when the user backlog is less than than the value of this attribute. Takes precedence over the somaxconn attribute. Default value: 0 somaxconn - Maximum value for socket listen queue length limit (backlog). Silently overrides user-specified backlog when the user backlog is greater than the value of this attribute. The sominconn attribute takes precedence. Default value: 1024 inet: ipqs - Number of IP processing queues. Default value: 1 ipqmaxlen - Maximum length of the IP input queue (ipintrq) before input packets are dropped. Default value: 1024 (bytes) tcbhashnum - Number of primary TCP hash table entries. Default value: 1 tcbhashsize - Sets the TCP control block hash table size. Default value: 32 net: netisrthreads - Number of network threads configured in a system. Default value: n (Based on the number of CPUs in a system. netisrwakeupthreshold - Number of packets (packet threshold) above which another netisr thread is started. Default value: 1 (packet) vm: vm_swap_eager - Specifies the swap allocation mode, which can be immediate mode (1) or deferred mode (0). Default value: 1 (immediate mode) vfs: name-cache-hash-size Size of the hash chain table for the namei cache. Default value: 256 slots namei-cache-valid-time Amount of time a namei cache entry can remain in the cache before it is discarded. Default value: 1200 (seconds) advfs: AdvfsCacheMaxPercent - The percentage of system memory that is allocated to the AdvFS buffer cache, which stores file data. Default value: 7 (percent) AdvfsCacheHashSize - Size of hash table for Advfs buffer cache. Default based on AdvfsCacheMaxPercent. Zeus 3.3.7 Tuning: ------------------ For details on the Zeus tuning parameters used please see: http://support.zeus.co.uk/faq/entries/tuning.html#31