[vchkpw] Vdelivermail high load
Hi all, Today, when issuing a top on my pop server, I noticed that there were some vdelivermails process eating a lot of cpu resources. Then, looking in the logs files, I saw that it was a spam to a specific domain, and this domain had the postmaster account as the 'catchall account'. What surprised me is the number of emails in the its Maildir: about 1479158 Is the number of emails in a Maildir related to the amount of cpu vdelivermail uses? I saw an increasing use of the disc too, somethings 100%... Thanks! ___ ALMEIDA, Fernando Costa de Computeasy Informtica www.computeasy.com.br BSD USER BSD050945 ICQ 72293951
Re: [vchkpw] Vdelivermail high load
On Tuesday 13 July 2004 09:47 am, Fernando Costa de Almeida wrote: Hi all, Today, when issuing a top on my pop server, I noticed that there were some vdelivermails process eating a lot of cpu resources. Then, looking in the logs files, I saw that it was a spam to a specific domain, and this domain had the postmaster account as the 'catchall account'. What surprised me is the number of emails in the its Maildir: about 1479158 Is the number of emails in a Maildir related to the amount of cpu vdelivermail uses? I saw an increasing use of the disc too, somethings 100%... if you're using ext2/3 filesystem, or any other non-directory hashing filesystem, this will occur. This isn't vpopmail's fault, it's the filesystem. You have two options, remove the emails, or switch to a better filesystem (such as reiserfs, or UFS with DIR_HASH) for more details about this filesystem issue, please visit google, as this is discussed on more mailing lists than you could possibly think of. -Jeremy -- Jeremy Kitchen ++ Systems Administrator ++ Inter7 Internet Technologies, Inc. [EMAIL PROTECTED] ++ www.inter7.com ++ 866.528.3530 ++ 847.492.0470 int'l kitchen @ #qmail #gentoo on EFnet ++ scriptkitchen.com/qmail
RE: [vchkpw] Vdelivermail high load
Hi Jeremy, thanks for your explanation! Im using FreeBSD and consequently an UFS Filesystem (with DIR_HASH and SoftUpdates enabled). I will delete the emails, but I posted this question just to make sure that my problem was caused by the high number of files in the user's Maildir. The next step is to avoid that an user have so many emails in his Maildir, perhaps enabling quota for all users... I frequently face high IO loads in this server, even though its has one dedicated disk for the qmail queue and logs. Thanks. ___ ALMEIDA, Fernando Costa de Computeasy Informtica www.computeasy.com.br BSD USER BSD050945 ICQ 72293951 -Original Message- From: Jeremy Kitchen [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 13, 2004 1:12 PM To: [EMAIL PROTECTED] Subject: Re: [vchkpw] Vdelivermail high load On Tuesday 13 July 2004 09:47 am, Fernando Costa de Almeida wrote: Hi all, Today, when issuing a top on my pop server, I noticed that there were some vdelivermails process eating a lot of cpu resources. Then, looking in the logs files, I saw that it was a spam to a specific domain, and this domain had the postmaster account as the 'catchall account'. What surprised me is the number of emails in the its Maildir: about 1479158 Is the number of emails in a Maildir related to the amount of cpu vdelivermail uses? I saw an increasing use of the disc too, somethings 100%... if you're using ext2/3 filesystem, or any other non-directory hashing filesystem, this will occur. This isn't vpopmail's fault, it's the filesystem. You have two options, remove the emails, or switch to a better filesystem (such as reiserfs, or UFS with DIR_HASH) for more details about this filesystem issue, please visit google, as this is discussed on more mailing lists than you could possibly think of. -Jeremy -- Jeremy Kitchen ++ Systems Administrator ++ Inter7 Internet Technologies, Inc. [EMAIL PROTECTED] ++ www.inter7.com ++ 866.528.3530 ++ 847.492.0470 int'l kitchen @ #qmail #gentoo on EFnet ++ scriptkitchen.com/qmail
RE: [vchkpw] Vdelivermail high load
On Tue, 13 Jul 2004, Fernando Costa de Almeida wrote: Hi Jeremy, thanks for your explanation! Im using FreeBSD and consequently an UFS Filesystem (with DIR_HASH and SoftUpdates enabled). I will delete the emails, but I posted this question just to make sure that my problem was caused by the high number of files in the user's Maildir. The next step is to avoid that an user have so many emails in his Maildir, perhaps enabling quota for all users... Another question... Is there a quota on this account? I've caught some maildrop and vdelivermail processes chewing up a ton of cpu just trying to recalculate the quota. Very similar situation; catchalls are evil and outdated. Since the user had an incredibly huge quota anyway, I set them to NOQUOTA with vmoduser and everything calmed down. Thanks, Charles I frequently face high IO loads in this server, even though its has one dedicated disk for the qmail queue and logs. Thanks. ___ ALMEIDA, Fernando Costa de Computeasy Informtica www.computeasy.com.br BSD USER BSD050945 ICQ 72293951 -Original Message- From: Jeremy Kitchen [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 13, 2004 1:12 PM To: [EMAIL PROTECTED] Subject: Re: [vchkpw] Vdelivermail high load On Tuesday 13 July 2004 09:47 am, Fernando Costa de Almeida wrote: Hi all, Today, when issuing a top on my pop server, I noticed that there were some vdelivermails process eating a lot of cpu resources. Then, looking in the logs files, I saw that it was a spam to a specific domain, and this domain had the postmaster account as the 'catchall account'. What surprised me is the number of emails in the its Maildir: about 1479158 Is the number of emails in a Maildir related to the amount of cpu vdelivermail uses? I saw an increasing use of the disc too, somethings 100%... if you're using ext2/3 filesystem, or any other non-directory hashing filesystem, this will occur. This isn't vpopmail's fault, it's the filesystem. You have two options, remove the emails, or switch to a better filesystem (such as reiserfs, or UFS with DIR_HASH) for more details about this filesystem issue, please visit google, as this is discussed on more mailing lists than you could possibly think of. -Jeremy -- Jeremy Kitchen ++ Systems Administrator ++ Inter7 Internet Technologies, Inc. [EMAIL PROTECTED] ++ www.inter7.com ++ 866.528.3530 ++ 847.492.0470 int'l kitchen @ #qmail #gentoo on EFnet ++ scriptkitchen.com/qmail
RE: [vchkpw] Vdelivermail high load
Yes! This account has a big quota (about 50MB)... Here is what I did: 1) Deleted all emails from this account; 2) Increased vfs.ufs.dirhash_maxmem to improve performance on big directories (Thanks to Jeremy who mades me read more about DIRHASH)... And now, I will set the users to NOQUOTA (thanks to you, hehe)... Another question... Is there a quota on this account? I've caught some maildrop and vdelivermail processes chewing up a ton of cpu just trying to recalculate the quota. Very similar situation; catchalls are evil and outdated. Since the user had an incredibly huge quota anyway, I set them to NOQUOTA with vmoduser and everything calmed down. Thanks, Charles I frequently face high IO loads in this server, even though its has one dedicated disk for the qmail queue and logs. Thanks. ___ ALMEIDA, Fernando Costa de Computeasy Informtica www.computeasy.com.br BSD USER BSD050945 ICQ 72293951 -Original Message- From: Jeremy Kitchen [mailto:[EMAIL PROTECTED] Sent: Tuesday, July 13, 2004 1:12 PM To: [EMAIL PROTECTED] Subject: Re: [vchkpw] Vdelivermail high load On Tuesday 13 July 2004 09:47 am, Fernando Costa de Almeida wrote: Hi all, Today, when issuing a top on my pop server, I noticed that there were some vdelivermails process eating a lot of cpu resources. Then, looking in the logs files, I saw that it was a spam to a specific domain, and this domain had the postmaster account as the 'catchall account'. What surprised me is the number of emails in the its Maildir: about 1479158 Is the number of emails in a Maildir related to the amount of cpu vdelivermail uses? I saw an increasing use of the disc too, somethings 100%... if you're using ext2/3 filesystem, or any other non-directory hashing filesystem, this will occur. This isn't vpopmail's fault, it's the filesystem. You have two options, remove the emails, or switch to a better filesystem (such as reiserfs, or UFS with DIR_HASH) for more details about this filesystem issue, please visit google, as this is discussed on more mailing lists than you could possibly think of. -Jeremy -- Jeremy Kitchen ++ Systems Administrator ++ Inter7 Internet Technologies, Inc. [EMAIL PROTECTED] ++ www.inter7.com ++ 866.528.3530 ++ 847.492.0470 int'l kitchen @ #qmail #gentoo on EFnet ++ scriptkitchen.com/qmail
