* Betr.: " Fw: Bug#605009: serious performance regression with ext4" (Fri, 26 Nov 2010 22:15:06 +0100): > * Betr.: " Re: Bug#605009: serious performance regression with ext4" (Fri, 26 > Nov 2010 16:33:06 +0100): > > > On Fri, 26 Nov 2010, Mathias Behrle wrote: > > > * Betr.: " Re: Bug#605009: serious performance regression with ext4" (Fri, > > > 26 Nov 2010 15:53:27 +0100): > > > > > > > That was ok everywhere except on ext4. > > > > > > JFTR: I am experiencing those problems as well on XFS. > > > > Can you give us figures to quantify the slowdown that you experience? > > Please compare dpkg 1.15.8.5 and 1.15.8.6. Finally some real numbers: command: time dpkg -i openjdk-6-doc_6b18-1.8.2-4_all.deb 1.15.8.6: ========= dpkg 1.15.8.6 with force-unsafe-io (1. install): real 8m12.093s user 0m1.737s sys 0m2.290s dpkg 1.15.8.6 with force-unsafe-io (2. run = replace): real 13m57.933s user 0m1.657s sys 0m3.596s dpkg 1.15.8.6 without force-unsafe-io (3. run = replace): real 19m50.008s user 0m1.940s sys 0m4.240s 1.15.8.5: ========= dpkg 1.15.8.5 (4. run = replace): real 15m13.063s user 0m1.723s sys 0m6.453s Seems, that 1.15.8.5 performs much better than 1.15.8.6 (without force-unsafe-io). Filesystem: / xfs defaults,noatime,nodiratime,logbufs=8 on an lvm volume Cheers, -- Mathias Behrle MBSolutions Gilgenmatten 10 A D-79114 Freiburg Tel: +49(761)471023 Fax: +49(761)4770816 http://m9s.biz UStIdNr: DE 142009020 PGP/GnuPG key availabable from any keyserver, ID: 0x8405BBF6
Attachment:
signature.asc
Description: PGP signature