From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-4.v29.ch3.sourceforge.com with esmtp (Exim 4.76) (envelope-from ) id 1UFLye-0000TX-LK; Tue, 12 Mar 2013 09:58:36 +0000 Received-SPF: pass (sog-mx-1.v43.ch3.sourceforge.com: domain of petertodd.org designates 62.13.149.56 as permitted sender) client-ip=62.13.149.56; envelope-from=pete@petertodd.org; helo=outmail149056.authsmtp.com; Received: from outmail149056.authsmtp.com ([62.13.149.56]) by sog-mx-1.v43.ch3.sourceforge.com with esmtp (Exim 4.76) id 1UFLyc-00037L-HO; Tue, 12 Mar 2013 09:58:36 +0000 Received: from mail-c232.authsmtp.com (mail-c232.authsmtp.com [62.13.128.232]) by punt10.authsmtp.com (8.14.2/8.14.2/Kp) with ESMTP id r2C9wQpj009678; Tue, 12 Mar 2013 09:58:26 GMT Received: from savin (76-10-178-109.dsl.teksavvy.com [76.10.178.109]) (authenticated bits=128) by mail.authsmtp.com (8.14.2/8.14.2/) with ESMTP id r2C9wJ3D056692 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Tue, 12 Mar 2013 09:58:21 GMT Date: Tue, 12 Mar 2013 05:57:49 -0400 From: Peter Todd To: Mike Hearn Message-ID: <20130312095749.GB8130@savin> References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WYTEVAkct0FjGQmd" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Server-Quench: 60063e85-8afb-11e2-b10b-0025903375e2 X-AuthReport-Spam: If SPAM / abuse - report it at: http://www.authsmtp.com/abuse X-AuthRoute: OCd2Yg0TA1ZNQRgX IjsJECJaVQIpKltL GxAVKBZePFsRUQkR bgdMdwAUFVQGAgsB AmUbW11eVVV7W2E7 bAxPbAVDY01GQQRq WVdMSlVNFUsqA28I QWQdJhl3cQNPejBx Z0NiXj5dXER8dhN1 R1NcRDtUeGZhPWIC AkFYJR5UcAFPdx9G aVd6AXFDAzANdhES HhM4ODE3eDlSNilR RRkIIFQOdA40FyQ6 RhYNT30qFEsUD311 cFQgLVIRBw4bKEg7 MhMmXxocOgUdB28W GVxICiJDb14PDzY7 SgleWkUdQ3VTRj1f SgcpORwg X-Authentic-SMTP: 61633532353630.1019:706 X-AuthFastPath: 0 (Was 255) X-AuthSMTP-Origin: 76.10.178.109/587 X-AuthVirus-Status: No virus detected - but ensure you scan with your own anti-virus system. X-Spam-Score: -1.5 (-) X-Spam-Report: Spam Filtering performed by mx.sourceforge.net. See http://spamassassin.org/tag/ for more details. -1.5 SPF_CHECK_PASS SPF reports sender host as permitted sender for sender-domain -0.0 SPF_PASS SPF: sender matches SPF record X-Headers-End: 1UFLyc-00037L-HO Cc: Bitcoin Dev , bitcoin-security@lists.sourceforge.net Subject: Re: [Bitcoin-development] Warning: many 0.7 nodes break on large number of tx/block; fork risk X-BeenThere: bitcoin-development@lists.sourceforge.net X-Mailman-Version: 2.1.9 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Mar 2013 09:58:36 -0000 --WYTEVAkct0FjGQmd Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Mar 12, 2013 at 10:10:15AM +0100, Mike Hearn wrote: > There are no bounds on the memory pool size. If too many transactions > enter the pool then nodes will start to die with OOM failures. > Therefore it is possible that we have a very limited amount of time > until nodes start dying en-masse. Note that nodes dying en-mass due to OOM failures is a relatively benign failure mode as the point as which any particular node would die is uncorrelated with other nodes - it won't cause a network fork. Implementing a simple and stupid "while [ true ] do ; ./bitcoind ; done" loop combined with ulimit to keep total memory usage to something sane is a perfectly acceptable hack until proper mempool code with expiration can be written. Gavin can talk more about his ideas in that regard. --=20 'peter'[:-1]@petertodd.org --WYTEVAkct0FjGQmd Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQEcBAEBAgAGBQJRPvwcAAoJEH+rEUJn5PoERRIH/27JZTjCYfqyUjYlCpk9WCiw sDzpjtqhQtQsgP183NTJqjLayqTSUUgtRuLD+iJ1lMc4NMkMcw4h00vHrVk2PIIa v2VN2uvw47ywGkwyllWK7LUWyKn/J89mp0LHstTujrmn6xaE9Jl8lLL3VAy6160u XtmIWVl4TULS/MhH5lRtgOeDJkJmhW5fYJpVrBvMBS0LyCKVAiq6G59E1Q6YXN+p r5jhp8aCARPX0ra9uiPvC9XbAkWMC6paAKafBKYpr7oRza8AxSCgQZiUOAl3mG8D qG2lcU4qwgdF4ofVrqtgX2Y5DZLlfonDZaOt9UI8aADagqSzhTZ8hgeXfOzC8bs= =iAWt -----END PGP SIGNATURE----- --WYTEVAkct0FjGQmd--