Date: Sat, 07 Feb 2004 20:57:22 -0600 From: Todd Lewis <todd@qdsdirect.com> To: freebsd-performance@freebsd.org Subject: frustratingly slow box at 4GB, but not 1GB of memory Message-ID: <4025A592.70909@qdsdirect.com>
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Did you try compiling the kernel with the option options PAE Your at the 4 gig marker. It wouldn't supprise me if your system is having dificulty accessing the 4gigs. My rule of thumb is 1 gig of memory for every 256k of on chip cache. P4 have 256k~512k 1~2g memory. Xenons have 512k, 2g for each processor. Xenon MP 512k to 1meg cache etc. etc. http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
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