From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-f171.google.com ([209.85.213.171]:35640 "EHLO mail-ig0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756584AbaISM6m (ORCPT ); Fri, 19 Sep 2014 08:58:42 -0400 Received: by mail-ig0-f171.google.com with SMTP id hn15so945991igb.16 for ; Fri, 19 Sep 2014 05:58:42 -0700 (PDT) Message-ID: <541C2873.3000904@gmail.com> Date: Fri, 19 Sep 2014 08:58:27 -0400 From: Austin S Hemmelgarn MIME-Version: 1.0 To: =?ISO-8859-1?Q?Sw=E2mi_Petaramesh?= , rob@robspanton.com CC: linux-btrfs@vger.kernel.org Subject: Re: Performance Issues References: <1411129114.1811.7.camel@zarniwoop.blob> <1779590.cL85uaaAL2@vajra> In-Reply-To: <1779590.cL85uaaAL2@vajra> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms080705050402060808030705" Sender: linux-btrfs-owner@vger.kernel.org List-ID: This is a cryptographically signed message in MIME format. --------------ms080705050402060808030705 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable On 2014-09-19 08:25, Sw=E2mi Petaramesh wrote: > Le vendredi 19 septembre 2014, 13:18:34 Rob Spanton a =E9crit : >> I have a particularly uncomplicated setup (a desktop PC with a hard >> disk) and I'm seeing particularly slow performance from btrfs. > > Weeelll I have the same over-complicated kind of setup, and an Arch Lin= ux > BTRFS system which used to boot in some decent amout of time in the pas= t now > takes about 5 full minutes to just make it to the KDM login prompt, and= > another 5 minutes before KDE is fully started. Makes me think of the go= od ole' > times of Windows 95 OSR2 on a 486SX with a dying 1 GB Hard disk... Well, part of your problem might be KDE itself, it's extremely CPU=20 intensive these days. I'd suggest disabling the 'semantic desktop'=20 stuff, because that tends to be the worst offender as far as soaking up=20 system resources. Also, if you recently switched to systemd, that may=20 be causing some slowdown as well (journald's default settings are=20 terrible for performance) > > Now, let me add that I had removed all snaphots, ran a full defrag, and= even > rebalanced the damn thing without any positive effect... > > (And yes, my HD is physically in good shape, SMART feels fully happy, a= nd it's > less than 75% full...) > > I've been using BTRFS for 2-3 years on a dozen of different systems, an= d if > something doesn't surprise me at all, it's =AB slow performance =BB, in= deed, > although I'm myself more accustomed to =AB incredibly fscking damn slow= > performance =BB... It's kind of funny, but I haven't had any performance issues with BTRFS=20 since about 3.10, even on the systems my employer is using Fedora 20 on, = and those use only a Core 2 Duo Processor, DDR2-800 RAM, and SATA2 hard=20 drives. > HTH > --------------ms080705050402060808030705 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIIFuDCC BbQwggOcoAMCAQICAw9gVDANBgkqhkiG9w0BAQ0FADB5MRAwDgYDVQQKEwdSb290IENBMR4w HAYDVQQLExVodHRwOi8vd3d3LmNhY2VydC5vcmcxIjAgBgNVBAMTGUNBIENlcnQgU2lnbmlu ZyBBdXRob3JpdHkxITAfBgkqhkiG9w0BCQEWEnN1cHBvcnRAY2FjZXJ0Lm9yZzAeFw0xNDA4 MDgxMTMwNDRaFw0xNTAyMDQxMTMwNDRaMGMxGDAWBgNVBAMTD0NBY2VydCBXb1QgVXNlcjEj MCEGCSqGSIb3DQEJARYUYWhmZXJyb2luN0BnbWFpbC5jb20xIjAgBgkqhkiG9w0BCQEWE2Fo ZW1tZWxnQG9oaW9ndC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDdmm8R BM5D6fGiB6rpogPZbLYu6CkU6834rcJepfmxKnLarYUYM593/VGygfaaHAyuc8qLaRA3u1M0 Qp29flqmhv1VDTBZ+zFu6JgHjTDniBii1KOZRo0qV3jC5NvaS8KUM67+eQBjm29LhBWVi3+e a8jLxmogFXV0NGej+GHIr5zA9qKz2WJOEoGh0EfqZ2MQTmozcGI43/oqIYhRj8fRMkWXLUAF WsLzPQMpK19hD8fqwlxQWhBV8gsGRG54K5pyaQsjne7m89SF5M8JkNJPH39tHEvfv2Vhf7EM Y4WGyhLAULSlym1AI1uUHR1FfJaj3AChaEJZli/AdajYsqc7AgMBAAGjggFZMIIBVTAMBgNV HRMBAf8EAjAAMFYGCWCGSAGG+EIBDQRJFkdUbyBnZXQgeW91ciBvd24gY2VydGlmaWNhdGUg Zm9yIEZSRUUgaGVhZCBvdmVyIHRvIGh0dHA6Ly93d3cuQ0FjZXJ0Lm9yZzAOBgNVHQ8BAf8E BAMCA6gwQAYDVR0lBDkwNwYIKwYBBQUHAwQGCCsGAQUFBwMCBgorBgEEAYI3CgMEBgorBgEE AYI3CgMDBglghkgBhvhCBAEwMgYIKwYBBQUHAQEEJjAkMCIGCCsGAQUFBzABhhZodHRwOi8v b2NzcC5jYWNlcnQub3JnMDEGA1UdHwQqMCgwJqAkoCKGIGh0dHA6Ly9jcmwuY2FjZXJ0Lm9y Zy9yZXZva2UuY3JsMDQGA1UdEQQtMCuBFGFoZmVycm9pbjdAZ21haWwuY29tgRNhaGVtbWVs Z0BvaGlvZ3QuY29tMA0GCSqGSIb3DQEBDQUAA4ICAQCr4klxcZU/PDRBpUtlb+d6JXl2dfto OUP/6g19dpx6Ekt2pV1eujpIj5whh5KlCSPUgtHZI7BcksLSczQbxNDvRu6LNKqGJGvcp99k cWL1Z6BsgtvxWKkOmy1vB+2aPfDiQQiMCCLAqXwHiNDZhSkwmGsJ7KHMWgF/dRVDnsl6aOQZ jAcBMpUZxzA/bv4nY2PylVdqJWp9N7x86TF9sda1zRZiyUwy83eFTDNzefYPtc4MLppcaD4g Wt8U6T2ffQfCWVzDirhg4WmDH3MybDItjkSB2/+pgGOS4lgtEBMHzAGQqQ+5PojTHRyqu9Jc O59oIGrTaOtKV9nDeDtzNaQZgygJItJi9GoAl68AmIHxpS1rZUNV6X8ydFrEweFdRTVWhUEL 70Cnx84YBojXv01LYBSZaq18K8cERPLaIrUD2go+2ffjdE9ejvYDhNBllY+ufvRizIjQA1uC OdktVAN6auQob94kOOsWpoMSrzHHvOvVW/kbokmKzaLtcs9+nJoL+vPi2AyzbaoQASVZYOGW pE3daA0F5FJfcPZKCwd5wdnmT3dU1IRUxa5vMmgjP20lkfP8tCPtvZv2mmI2Nw5SaXNY4gVu WQrvkV2in+TnGqgEIwUrLVbx9G6PSYZZs07czhO+Q1iVuKdAwjL/AYK0Us9v50acIzbl5CWw ZGj3wjGCA6EwggOdAgEBMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6 Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEh MB8GCSqGSIb3DQEJARYSc3VwcG9ydEBjYWNlcnQub3JnAgMPYFQwCQYFKw4DAhoFAKCCAfUw GAYJKoZIhvcNAQkDMQsGCSqGSIb3DQEHATAcBgkqhkiG9w0BCQUxDxcNMTQwOTE5MTI1ODI3 WjAjBgkqhkiG9w0BCQQxFgQU6PMKUH+L0aCEX5p/MrMIKFy8q3owbAYJKoZIhvcNAQkPMV8w XTALBglghkgBZQMEASowCwYJYIZIAWUDBAECMAoGCCqGSIb3DQMHMA4GCCqGSIb3DQMCAgIA gDANBggqhkiG9w0DAgIBQDAHBgUrDgMCBzANBggqhkiG9w0DAgIBKDCBkQYJKwYBBAGCNxAE MYGDMIGAMHkxEDAOBgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0 Lm9yZzEiMCAGA1UEAxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJ ARYSc3VwcG9ydEBjYWNlcnQub3JnAgMPYFQwgZMGCyqGSIb3DQEJEAILMYGDoIGAMHkxEDAO BgNVBAoTB1Jvb3QgQ0ExHjAcBgNVBAsTFWh0dHA6Ly93d3cuY2FjZXJ0Lm9yZzEiMCAGA1UE AxMZQ0EgQ2VydCBTaWduaW5nIEF1dGhvcml0eTEhMB8GCSqGSIb3DQEJARYSc3VwcG9ydEBj YWNlcnQub3JnAgMPYFQwDQYJKoZIhvcNAQEBBQAEggEARcHhUesrcW64bJ6d8yu8J05vO4JE 9ew38a6z/Qaw4qCx+evgfXskxMNKIpFHUISqeBsYEhX/71TwlA4WcDazCl54kIuyNF75/M+J Hyq+NZHAWEBcWmH+Yhakq/AfrZYcz7nMNoEiPLPKSb1rsj8VoodRSkQGLcWcjU3dfBH0CUcb HMAELg9MnFZtiA9PxjGyiXRCse9D5ja+FwE+p3gsSx/MIjIuEuaxTyNTe+fi+lht1KwtYmf2 kSMSU2cKa10HMaEohxB8iQIBS1aqs+zfpRuw9ud8cixRwN4+fvtTIBQmH+FhfeFgnKKMibJc J9Vdxt3BCJuUBXtgnaLNubppfgAAAAAAAA== --------------ms080705050402060808030705--