Date: Mon, 2 May 2005 04:48:12 +0100 (BST) From: Robert Watson <rwatson@FreeBSD.org> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-performance@freebsd.org Subject: Re: 64bit CPUs Message-ID: <20050502044655.E78953@fledge.watson.org> In-Reply-To: <6.2.1.2.0.20050501094429.06974910@64.7.153.2> References: <6.2.1.2.0.20050501094429.06974910@64.7.153.2>
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On Sun, 1 May 2005, Mike Tancsa wrote: > A somewhat obvious question to some perhaps, but what server application > mix on FreeBSD today sees an improvement using 64bit CPUs ? In my ISP > centric world, my big apps are BIND, IMAP/POP3, httpd via apache, SMTP, > AV and SPAM scanning, and firewalls/routing. Apart from larger RAM, why > would these benefit from the 64bit world ? Or would they ? RAM/address space is the big reason. In fact, applications compiled for 64-bits may well run slower than 32-bit ones running on the 64-bit kernel. Note that systems like Solaris default build many programs as 32-bit, since there's no benefit to running ls(1) with a 64-bit address space. On the other hand, if you need a large memory system, running a 64-bit system will give you better support and utilization than a 32-bit system runing with PAE, at least on FreeBSD. Robert N M Watson
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