From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
To: Stefan Majer <stefan.majer@gmail.com>
Cc: Mark Nelson <mark.nelson@inktank.com>,
yehuda@inktank.com,
"ceph-devel@vger.kernel.org" <ceph-devel@vger.kernel.org>
Subject: Re: poor OSD performance using kernel 3.4 => problem found
Date: Thu, 31 May 2012 14:18:59 +0200 [thread overview]
Message-ID: <4FC761B3.1090200@profihost.ag> (raw)
In-Reply-To: <CADdPHGtiTp8nK07O-6EiSd4k68TP_HQEa4_ZmOqV6zQrnhPo4w@mail.gmail.com>
Hi Mark, Hi Stefan,
i found a way to solve it by comparing /proc/sys/net with an patched and
an unpatched kernel.
Strangely the problem occours when the values are too big (in new kernel).
With the smaller values everything works fine even under 3.4. Any ideas
how that can be? I thought these values should be tuned to a maximum for
max performance.
- => old kernel
+ => new kernel
-/proc/sys/net/ipv4/tcp_rmem:4096 87380 6291456
+/proc/sys/net/ipv4/tcp_rmem:4096 87380 514873
-/proc/sys/net/ipv4/tcp_wmem:4096 16384 4194304
+/proc/sys/net/ipv4/tcp_wmem:4096 16384 514873
Stefan
next prev parent reply other threads:[~2012-05-31 12:19 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-24 14:10 poor OSD performance using kernel 3.4 Stefan Priebe - Profihost AG
2012-05-24 14:57 ` Mark Nelson
[not found] ` <CAJCPpW+SKnnVUaDEAsCkKyZwMVrHCRJF2C8zqB4eORgwW5p=1Q@mail.gmail.com>
[not found] ` <4FBE7ABC.5020502@profihost.ag>
2012-05-24 18:53 ` Mark Nelson
2012-05-24 19:05 ` Stefan Priebe
2012-05-25 1:53 ` Mark Nelson
2012-05-25 8:19 ` Stefan Priebe - Profihost AG
2012-05-25 11:31 ` Stefan Priebe - Profihost AG
2012-05-25 12:10 ` Stefan Priebe - Profihost AG
2012-05-25 15:47 ` Alexandre DERUMIER
2012-05-27 9:11 ` Stefan Priebe - Profihost AG
2012-05-27 11:33 ` Alexandre DERUMIER
2012-05-27 18:57 ` Stefan Priebe
2012-05-28 5:37 ` Alexandre DERUMIER
2012-05-28 6:25 ` Stefan Priebe
2012-05-28 6:52 ` Alexandre DERUMIER
2012-05-28 19:48 ` Stefan Priebe
2012-05-29 3:54 ` Alexandre DERUMIER
2012-05-29 8:22 ` Stefan Priebe - Profihost AG
2012-05-29 13:01 ` Alexandre DERUMIER
2012-05-29 14:18 ` Stefan Priebe - Profihost AG
2012-05-29 9:46 ` Stefan Priebe - Profihost AG
2012-05-29 13:39 ` Yann Dupont
2012-05-29 14:43 ` Stefan Priebe - Profihost AG
2012-05-29 17:50 ` Mark Nelson
2012-05-29 19:50 ` Yann Dupont
2012-05-29 21:04 ` Stefan Priebe
2012-05-29 21:08 ` Stefan Priebe
2012-05-29 21:31 ` Yann Dupont
2012-05-29 21:34 ` Stefan Priebe
2012-05-29 21:45 ` Yann Dupont
2012-05-30 6:29 ` Stefan Priebe - Profihost AG
2012-05-29 21:41 ` Mark Nelson
2012-05-30 6:22 ` Stefan Priebe - Profihost AG
2012-05-30 7:20 ` building test cluster : missing /etc/ceph/client.admin.keyring, need help Alexandre DERUMIER
2012-05-30 7:25 ` Stefan Priebe - Profihost AG
2012-05-30 7:33 ` Alexandre DERUMIER
2012-05-30 7:47 ` Alexandre DERUMIER
2012-05-29 22:25 ` poor OSD performance using kernel 3.4 Mark Nelson
2012-05-30 6:33 ` Stefan Priebe - Profihost AG
[not found] ` <CADdPHGs9dpSh9Oyu+5yDhyYU=Et_-zF5MuYybBuuAN5DgR433A@mail.gmail.com>
2012-05-30 7:16 ` Stefan Priebe - Profihost AG
[not found] ` <CADdPHGuiJqZUCK-0qR_CrOo6GRhkjaCdkOhJ2boq3zD0_voTsA@mail.gmail.com>
2012-05-30 11:04 ` Stefan Priebe - Profihost AG
[not found] ` <CADdPHGuLAL5+hkzq0tigqu355DvPxkhE5sxBhOVZPj=EzDSVtA@mail.gmail.com>
2012-05-30 11:25 ` Stefan Priebe - Profihost AG
2012-05-30 12:17 ` Mark Nelson
2012-05-30 12:41 ` Stefan Priebe - Profihost AG
[not found] ` <CADdPHGsmr8Ht1pTWH1Oe8=NmAyM81SSdH+c_GV89D8ntfyUmgA@mail.gmail.com>
2012-05-30 13:19 ` Stefan Priebe - Profihost AG
[not found] ` <CADdPHGvxCmuViy+0==Vkdz_QjC1K+kD5kD1m7+0tYM2YDTtJbw@mail.gmail.com>
2012-05-30 13:54 ` Stefan Priebe - Profihost AG
[not found] ` <4FC63381.6090300@inktank.com>
2012-05-30 14:53 ` Stefan Priebe
2012-05-30 14:56 ` Mark Nelson
2012-05-30 18:26 ` Stefan Priebe
2012-05-30 19:41 ` Mark Nelson
2012-05-30 13:27 ` Mark Nelson
2012-05-30 13:51 ` Stefan Priebe - Profihost AG
2012-05-30 14:16 ` Mark Nelson
2012-05-30 18:42 ` Stefan Priebe
[not found] ` <CADdPHGuxa7TAyqXcXehb9WgKgkHwkybYTrj2oue_PKsiF+oR3A@mail.gmail.com>
2012-05-30 21:10 ` Stefan Priebe
[not found] ` <CADdPHGutEwoDc=Kcrqcx2ZMO=dqhuoT5iLoP-WxqD+e5ZUmBRA@mail.gmail.com>
2012-05-31 7:10 ` poor OSD performance using kernel 3.4 => problem found Stefan Priebe - Profihost AG
2012-05-31 7:30 ` Yehuda Sadeh
[not found] ` <CADdPHGtz9Jq624DMO6Dve2AcJ9vrnFHbyqRa+qheA+0-y4k++g@mail.gmail.com>
2012-05-31 12:31 ` Mark Nelson
2012-05-31 12:33 ` Stefan Priebe - Profihost AG
2012-05-31 13:21 ` Yann Dupont
2012-05-31 13:37 ` Stefan Priebe - Profihost AG
2012-05-31 13:45 ` Yann Dupont
2012-05-31 14:42 ` Yann Dupont
2012-05-31 15:32 ` Mark Nelson
2012-05-31 15:43 ` Yann Dupont
2012-05-31 16:14 ` Mark Nelson
2012-05-31 16:29 ` Sage Weil
2012-05-31 16:37 ` Yann Dupont
[not found] ` <CADdPHGv0YjxDQFnZML-55jDj7XxHxaxUZ_FeQ=ReKK6Rs7NNhw@mail.gmail.com>
2012-05-31 8:04 ` Stefan Priebe - Profihost AG
2012-05-31 8:09 ` Stefan Majer
2012-05-31 11:34 ` Stefan Priebe - Profihost AG
2012-05-31 12:18 ` Stefan Priebe - Profihost AG [this message]
2012-05-30 11:51 ` poor OSD performance using kernel 3.4 Mark Nelson
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