I keep the quoted message complete because the original thread was posted six months ago. I am top-posting, no comments inside the quoted text.
I plan to write a blog about mdbox oddities but in the meantime I can tell you that if you store attachments "detached" in your mdbox storage the issue is this: 1. You have a 200Kbytes MB m.* file you are currently targeting. 2. You have a new email to store. Lets say it has a 3MB attachment. 3. You have a 2MB mdbox max file size . 4. Dovecot notices that 0.2+3 > 2, so it will create a new m.* file. 5. When storing the message, it will store the attachment outside of the mbox, so the new m.* file will be, lets say, 5Kbytes only. 6. Now you have 2 m.* files: one of 200 Kbytes and other of 5Kbytes. 7. Dovecot tries to reuse undersized m.* files, but it is quite forgiving. I have some private patches to increase its agressiveness. If you don't detach attachment, you probably have the same issue: when a new message makes a m.* file to oversize, dovecot creates a new m.* file and leave the old one alone, so it will be undersized. On 06/05/14 03:05, Stan Hoeppner wrote: > On 5/5/2014 2:23 PM, Patrick Domack wrote: >> Quoting Reindl Harald <h.rei...@thelounge.net>: >> >>> Am 05.05.2014 16:10, schrieb Hardy Flor: >>>> Is there really no one with this problem? >>> >>> next time quote the problem instead demand >>> others to seek for you in the archives >> >> Even searching for him in the archives, I have no idea what he thinks is >> a problem. >> >> I know I have no issues using mdbox, with 2mb or 50mb rotate sizes. > > > He's wondering why many of his mdbox files are much smaller than 2 MB. > His original post: > > > On 3/17/2014 1:29 AM, Hardy Flor wrote: >> Hello, >> >> there are copies with different size in 3 mailboxes of the user >> sequentially about 3800 emails. >> why not something 2MB files? >> >> After the big file "m.00000034" with 14MB follow very many small ... >> >> ------------------------------------- doveconf: >> >> # 2.2.12: /etc/dovecot/dovecot.conf >> # OS: Linux 3.2.0-4-amd64 x86_64 Debian 7.4 ext4 >> mail_attachment_dir = /var/mail/attachments >> mail_attachment_hash = %{md5} >> mail_attachment_min_size = 16 k >> mail_location = mdbox:/var/mail/user/%n >> mdbox_rotate_interval = 1 weeks >> mdbox_rotate_size = 2 M >> >> ------------------------------------- directory: >> >> root@xxx:/var/mail/user/xxx/storage# ls -al >> insgesamt 76532 >> drwx--S--- 2 vmail mail 4096 Mär 16 13:52 . >> drwx--S--- 6 vmail mail 4096 Mär 16 12:10 .. >> -rw------- 1 vmail mail 74360 Mär 16 12:39 dovecot.map.index >> -rw------- 1 vmail mail 25204 Mär 16 13:52 dovecot.map.index.log >> -rw------- 1 vmail mail 63544 Mär 16 12:39 dovecot.map.index.log.2 >> -rw------- 1 vmail mail 2092921 Mär 16 12:15 m.00000001 >> -rw------- 1 vmail mail 2086746 Mär 16 12:15 m.00000002 >> -rw------- 1 vmail mail 2084182 Mär 16 12:15 m.00000003 >> -rw------- 1 vmail mail 2096826 Mär 16 12:15 m.00000004 >> -rw------- 1 vmail mail 1882666 Mär 16 12:15 m.00000005 >> -rw------- 1 vmail mail 1903965 Mär 16 12:15 m.00000006 >> -rw------- 1 vmail mail 2091169 Mär 16 12:15 m.00000007 >> -rw------- 1 vmail mail 2086396 Mär 16 12:15 m.00000008 >> -rw------- 1 vmail mail 507205 Mär 16 12:16 m.00000009 >> -rw------- 1 vmail mail 2031456 Mär 16 12:17 m.00000010 >> -rw------- 1 vmail mail 2095697 Mär 16 12:17 m.00000011 >> -rw------- 1 vmail mail 1689071 Mär 16 12:17 m.00000012 >> -rw------- 1 vmail mail 2092124 Mär 16 12:17 m.00000013 >> -rw------- 1 vmail mail 1950602 Mär 16 12:17 m.00000014 >> -rw------- 1 vmail mail 2092215 Mär 16 12:17 m.00000015 >> -rw------- 1 vmail mail 2087463 Mär 16 12:17 m.00000016 >> -rw------- 1 vmail mail 2079795 Mär 16 12:17 m.00000017 >> -rw------- 1 vmail mail 2014121 Mär 16 12:17 m.00000018 >> -rw------- 1 vmail mail 2081893 Mär 16 12:17 m.00000019 >> -rw------- 1 vmail mail 2092088 Mär 16 12:17 m.00000020 >> -rw------- 1 vmail mail 2090508 Mär 16 12:17 m.00000021 >> -rw------- 1 vmail mail 1929296 Mär 16 12:17 m.00000022 >> -rw------- 1 vmail mail 2067685 Mär 16 12:17 m.00000023 >> -rw------- 1 vmail mail 1745743 Mär 16 12:20 m.00000024 >> -rw------- 1 vmail mail 866452 Mär 16 12:20 m.00000025 >> -rw------- 1 vmail mail 296379 Mär 16 12:20 m.00000026 >> -rw------- 1 vmail mail 433541 Mär 16 12:39 m.00000027 >> -rw------- 1 vmail mail 92526 Mär 16 12:39 m.00000028 >> -rw------- 1 vmail mail 19094 Mär 16 12:39 m.00000029 >> -rw------- 1 vmail mail 106837 Mär 16 12:39 m.00000030 >> -rw------- 1 vmail mail 162012 Mär 16 12:39 m.00000031 >> -rw------- 1 vmail mail 412080 Mär 16 13:51 m.00000032 >> -rw------- 1 vmail mail 1715868 Mär 16 13:51 m.00000033 >> -rw------- 1 vmail mail 14433784 Mär 16 13:51 m.00000034 >> -rw------- 1 vmail mail 3280 Mär 16 13:51 m.00000035 >> -rw------- 1 vmail mail 6308 Mär 16 13:51 m.00000036 >> -rw------- 1 vmail mail 534274 Mär 16 13:51 m.00000037 >> -rw------- 1 vmail mail 378719 Mär 16 13:51 m.00000038 >> -rw------- 1 vmail mail 458528 Mär 16 13:51 m.00000039 >> -rw------- 1 vmail mail 192504 Mär 16 13:51 m.00000040 >> -rw------- 1 vmail mail 1277766 Mär 16 13:51 m.00000041 >> -rw------- 1 vmail mail 33417 Mär 16 13:51 m.00000042 >> -rw------- 1 vmail mail 142866 Mär 16 13:51 m.00000043 >> -rw------- 1 vmail mail 113529 Mär 16 13:51 m.00000044 >> -rw------- 1 vmail mail 55888 Mär 16 13:51 m.00000045 >> -rw------- 1 vmail mail 673504 Mär 16 13:51 m.00000046 >> -rw------- 1 vmail mail 430738 Mär 16 13:51 m.00000047 >> -rw------- 1 vmail mail 218494 Mär 16 13:51 m.00000048 >> -rw------- 1 vmail mail 96165 Mär 16 13:51 m.00000049 >> -rw------- 1 vmail mail 8370 Mär 16 13:51 m.00000050 >> -rw------- 1 vmail mail 29251 Mär 16 13:51 m.00000051 >> -rw------- 1 vmail mail 394680 Mär 16 13:51 m.00000052 >> -rw------- 1 vmail mail 674892 Mär 16 13:51 m.00000053 >> -rw------- 1 vmail mail 1076919 Mär 16 13:51 m.00000054 >> -rw------- 1 vmail mail 258806 Mär 16 13:51 m.00000055 >> -rw------- 1 vmail mail 60069 Mär 16 13:51 m.00000056 >> -rw------- 1 vmail mail 297891 Mär 16 13:51 m.00000057 >> -rw------- 1 vmail mail 92772 Mär 16 13:51 m.00000058 >> -rw------- 1 vmail mail 129272 Mär 16 13:51 m.00000059 >> -rw------- 1 vmail mail 56073 Mär 16 13:51 m.00000060 >> -rw------- 1 vmail mail 528260 Mär 16 13:51 m.00000061 >> -rw------- 1 vmail mail 29468 Mär 16 13:51 m.00000062 >> -rw------- 1 vmail mail 3250 Mär 16 13:51 m.00000063 >> -rw------- 1 vmail mail 96445 Mär 16 13:51 m.00000064 >> -rw------- 1 vmail mail 337663 Mär 16 13:51 m.00000065 >> -rw------- 1 vmail mail 187505 Mär 16 13:51 m.00000066 >> -rw------- 1 vmail mail 98839 Mär 16 13:51 m.00000067 >> -rw------- 1 vmail mail 5294 Mär 16 13:51 m.00000068 >> -rw------- 1 vmail mail 28276 Mär 16 13:51 m.00000069 >> -rw------- 1 vmail mail 67950 Mär 16 13:52 m.00000070 >> -rw------- 1 vmail mail 704457 Mär 16 13:52 m.00000071 >> -rw------- 1 vmail mail 1410205 Mär 16 13:52 m.00000072 >> -rw------- 1 vmail mail 736330 Mär 16 13:52 m.00000073 >> -rw------- 1 vmail mail 616992 Mär 16 13:52 m.00000074 > -- Jesús Cea Avión _/_/ _/_/_/ _/_/_/ j...@jcea.es - http://www.jcea.es/ _/_/ _/_/ _/_/ _/_/ _/_/ Twitter: @jcea _/_/ _/_/ _/_/_/_/_/ jabber / xmpp:j...@jabber.org _/_/ _/_/ _/_/ _/_/ _/_/ "Things are not so easy" _/_/ _/_/ _/_/ _/_/ _/_/ _/_/ "My name is Dump, Core Dump" _/_/_/ _/_/_/ _/_/ _/_/ "El amor es poner tu felicidad en la felicidad de otro" - Leibniz
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