Date: Tue, 08 Jan 2013 12:42:30 +0000 From: Karl Pielorz <kpielorz_lst@tdx.co.uk> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: freebsd-net@FreeBSD.org Subject: Re: Arp table size - any adjustments? Message-ID: <1AAC1452A561ABA2C6309047@MightyAtom.tdx.co.uk> In-Reply-To: <20121213113333.GT97487@FreeBSD.org> References: <523DE5571B5BE81B8BA1846F@MightyAtom.tdx.co.uk> <20121213113333.GT97487@FreeBSD.org>
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--On 13 December 2012 15:33 +0400 Gleb Smirnoff <glebius@FreeBSD.org> wrote: > Nope, there is no autotuning here yet. > > The hash table size is hardcoded in sys/net/if_llatbl.h. The name of > constant is LLTBL_HASHTBL_SIZE. Default is 32, which is even commented with "/* default 32 ? */" - I found another thread via Google which discussed upping this to 512 for a 'Generic Box' For a router that has 4k+ ARP entries, any recommendations? - e.g. 1024? / 2048? 2048 seems sensible considering the other thread recommended it should be 1/4 the table size (so, 4k entries in arp table = 2k hash?) or even 4k to cover expansion. -Karl
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