> No, we don't have the noticeable iowait problem as I see it(at least > until > the number of connections lower 20-30K). The problem appears when > thousands > of clients try to reconnect at the same time and according to the > documentation the auth service should make a simple request to postgres > for > this. This should not be related to i\o in theory. Just a sql query.
Oh yes? What is this then /usr/local/bin/postlogin.sh I don't know you have to look at what is different after the restart. > I don't really get this authentication attempts is limitted by tcp not? > So > > it does not really matter what you have mariadb, ldap, http, you > awalys are > > limited to 150-200 r/s. > > Can you explain? We also have SMTP connections and postfix on the same > servers, but problems arise only at the stage of connecting to IMAP via > postgres. How can this be related to tcp limits? Probably not as you only restarted. The limit is when you have create a new connection and don't use an existing one. > Additionally, I would like to note that we can have hundreds of > connections > from one IP. Could this lead to a race condition with the anvil service > and > an increase in connection timeouts? But this to you already had before the restart not? You have to search what is different. _______________________________________________ dovecot mailing list -- dovecot@dovecot.org To unsubscribe send an email to dovecot-le...@dovecot.org
