Hi Aki,
thank you very much for your reply.
What do you mean with "triggering maildir scans"?
Here is dovecot -n output:
# 2.0.9: /etc/dovecot/dovecot.conf # OS: Linux 2.6.32-642.15.1.el6.x86_64 x86_64 CentOS release 6.9 (Final) auth_mechanisms = plain login digest-md5 cram-md5 debug_log_path = /var/log/dovecot.log disable_plaintext_auth = no first_valid_gid = 89 first_valid_uid = 89 mail_gid = 89 mail_location = maildir:/var/spool/domains mail_uid = 89 managesieve_notify_capability = mailto managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date imapflags notify mbox_write_locks = fcntl namespace { inbox = yes location = prefix = INBOX. separator = . type = private } passdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } passdb { args = /etc/dovecot/dovecot-sql-crypt.conf.ext driver = sql } plugin { sieve = ~/.dovecot.sieve sieve_dir = ~/sieve sieve_extensions = +notify +imapflags sieve_max_script_size = 1M } protocols = imap pop3 lmtp sieve ssl_cert = </etc/nginx/ssl/wildcard.domain.net_bundle.crt ssl_key = </etc/nginx/ssl/wildcard.domain.net.key userdb { args = /etc/dovecot/dovecot-sql.conf.ext driver = sql } protocol lmtp { mail_plugins = } protocol lda { mail_plugins = } protocol imap { imap_id_log = * }
Thank you very much
Il 21 settembre 2017 alle 11.13 Aki Tuomi <aki.tuomi@dovecot.fi> ha scritto: On 21.09.2017 00:56, absolutely_free@libero.it wrote: > >Hi, I am using dovecot 2.0.9 (official CentOS rpm), I am experiencing very high load issue. I think it is something related to my storage (/var/spool is about 3 TB and it is almost full). I noticed those kind of messages in /var/log/maillog: Warning: Maildir: Scanning /var/spool/pop/domains/domain.it/username/Maildir/cur took 100 seconds (14281 readdir()s, 0 rename()s to cur/) Maybe you have just too much load on your server. Also you seem to be triggering maildir scans which are expensive. >Also the version you are running is from 2011, so it's ... rather dated. You should probably update your system to centos7 which at least has 2.2.10, which is still rather old, but less so. > > >Warning: Maildir /var/spool/pop/domains/domain.it/username/Maildir: Synchronization took 103 seconds (0 new msgs, 0 flag change attempts, 0 expunge attempts) I wondering if there is something to try, at configuration level, to "mitigate" this.. I use Maildir format, MTA is postfix, I have many users (> 10000) with pop3/imap/webmail access. Physical server with 8 GB RAM and two CPU (Intel(R) Pentium(R) D CPU 3.00GHz) This is my dovecot's conf: please use doveconf -n >Aki