Date: Fri, 22 Jan 2021 13:02:03 +0300 From: Victor Gamov <vit@otcnet.ru> To: Eugene Grosbein <eugen@grosbein.net>, freebsd-net@freebsd.org Subject: Re: 'dropped due to full socket buffers' by SNMP Message-ID: <226279d6-7579-9441-9854-f238057abeb6@otcnet.ru> In-Reply-To: <706bf341-01dd-f9f9-a5a8-afb8c34d5572@grosbein.net> References: <388da9a7-7b89-89b2-54eb-17d0e818c924@otcnet.ru> <4e41c1d2-19bc-0345-0b03-526e4cb785c7@otcnet.ru> <b279e676-c789-2978-98a0-b8a4b164a111@grosbein.net> <a69d872a-f21e-de66-7677-58beccb0f023@otcnet.ru> <6c780827-e764-8053-356b-a921e0892c15@grosbein.net> <fef04bda-6aa0-4a80-8999-867b9f37d766@otcnet.ru> <7e51a6be-aea1-51c6-c0bd-10d00c19d5d3@grosbein.net> <888c8e91-c8f2-ad4b-9fcf-64c09432f2d5@otcnet.ru> <427b5ef6-9558-22ad-6088-c852bf234d13@otcnet.ru> <706bf341-01dd-f9f9-a5a8-afb8c34d5572@grosbein.net>
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On 22.01.2021 12:52, Eugene Grosbein wrote: > 22.01.2021 16:27, Victor Gamov wrote: > >> I increase kern.ipc.maxsockbuf from 2097152 -> 2597152 -> 3145728 but >> netstat -sn -p udp | grep 'dropped due to full socket buffers' still show dropped packets. >> >> Then I increase net.inet.udp.recvspace 84160 -> 105200 but 'dropped due to full socket buffers' packets still here. >> >> Do I need to try to increase something else? > > Increase of various buffers may help against very short traffic bursts or limited time interface congestion. > It won't help in case you have permanent (or nearly permanent) link overload. No link overload: this host attached to network via 10G ix0, many VLANs on this ix0 and some sender on every VLAN sends multicast traffic to this host. Total input traffic about 1Gbit/s -- CU, Victor Gamov
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