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Ok fixed the problem Postfix, SASL with MySQL username and password prompting users a
few times a day when sending email the issue was the default configuration
for MySQL server /etc/mysql/my.cnf to many connections are open and MySQL does
not accept any more. NOTE: if you are having this problem with
email you can look under /var/logs/mail.log for error details Or email them to you with this command egrep '(warning|error|fatal|panic):'
/var/log/mail.log | mail -s "maillog" name@domain.com Help this may help others with this issue. MYFIX: I updated the /etc/mysql/my.cnf to
medium volume mysql server. sample file below Also don't forget to restart MySQL after
changes to my.cnf /etc/init.d/mysql restart my.cnf file ********** START FILE *********** # Example MySQL config file for medium
systems. # # This is for a system with little memory
(32M - 64M) where MySQL plays # an important part, or systems up to 128M where
MySQL is used together with # other programs (such as a web server) # # The
following options will be passed to all MySQL clients [client] #password = your_password port = 3306 socket = /var/run/mysqld/mysqld.sock # Here follows entries for some specific
programs # The MySQL server [mysqld] port = 3306 socket = /var/run/mysqld/mysqld.sock skip-locking key_buffer = 16M # max_allowed_packet = 1M table_cache = 64 sort_buffer_size = 512K net_buffer_length = 8K myisam_sort_buffer_size = 8M max_user_connections=500 max_connections=500 interactive_timeout = 120 wait_timeout = 120 thread_cache = 40 skip-name-resolve skip-innodb user = mysql pid-file = /var/run/mysqld/mysqld.pid socket = /var/run/mysqld/mysqld.sock port = 3306 # Both location gets rotated by the
cronjob. #log = /var/log/mysql.log log = /var/log/mysql/mysql.log basedir = /usr datadir = /var/lib/mysql tmpdir = /tmp language = /usr/share/mysql/english skip-external-locking # Don't listen on a TCP/IP port at all.
This can be a security enhancement, # if all processes that need to connect to
mysqld run on the same host. # All interaction with mysqld must be made
via Unix sockets or named pipes. # Note that using this option without
enabling named pipes on Windows # (via the "enable-named-pipe"
option) will render mysqld useless! # #skip-networking max_allowed_packet = 16M thread_stack = 128K # # Query Cache Configuration # query_cache_limit = 1048576 query_cache_size = 26214400 query_cache_type = 1 # # Here you can see queries with especially
long duration log-slow-queries =
/var/log/mysql/mysql-slow.log # Replication Master Server (default) # binary logging is required for
replication log-bin # required unique id between 1 and 2^32 -
1 # defaults to 1 if master-host is not set # but will not function as a master
if omitted server-id = 1 # Replication Slave (comment out master
section to use this) # # To configure this host as a replication slave, you can
choose between # two methods : # # 1) Use the CHANGE MASTER TO command
(fully described in our manual) - # the syntax is: # # CHANGE MASTER TO
MASTER_HOST=<host>, MASTER_PORT=<port>, # MASTER_USER=<user>,
MASTER_PASSWORD=<password> ; # # where you replace <host>,
<user>, <password> by quoted strings and # <port> by the master's port number
(3306 by default). # # Example: # # CHANGE MASTER TO
MASTER_HOST='125.564.12.1', MASTER_PORT=3306, # MASTER_USER='joe',
MASTER_PASSWORD='secret'; # # OR # # 2) Set the variables below. However, in
case you choose this method, then # start replication for the first time
(even unsuccessfully, for example # if you mistyped the password in
master-password and the slave fails to # connect), the slave will create a
master.info file, and any later # change in this file to the variables'
values below will be ignored and # overridden by the content of the
master.info file, unless you shutdown # the slave server, delete master.info and
restart the slaver server. # For that reason, you may want to leave
the lines below untouched # (commented) and instead use CHANGE
MASTER TO (see above) # # required unique id between 2 and 2^32 -
1 # (and different from the master) # defaults to 2 if master-host is set # but
will not function as a slave if omitted #server-id = 2 # # The replication master for this slave -
required #master-host = <hostname> # # The username the slave will use for
authentication when connecting # to the master - required #master-user = <username> # # The password the slave will authenticate
with when connecting to # the master - required #master-password = <password> # # The port the master is listening on. # optional - defaults to 3306 #master-port = <port> # # binary logging - not required for
slaves, but recommended #log-bin # Point the following paths to different
dedicated disks #tmpdir = /tmp/ #log-update =
/path-to-dedicated-directory/hostname # Uncomment the following if you are using
BDB tables #bdb_cache_size = 4M #bdb_max_lock = 10000 # Uncomment the following if you are using
InnoDB tables #innodb_data_home_dir = /var/lib/mysql/ #innodb_data_file_path =
ibdata1:10M:autoextend #innodb_log_group_home_dir = /var/lib/mysql/
#innodb_log_arch_dir = /var/lib/mysql/ # You can set .._buffer_pool_size up to
50 - 80 % # of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M #innodb_additional_mem_pool_size = 2M # Set
.._log_file_size to 25 % of buffer pool size #innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M #innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50 [mysqldump] quick quote-names max_allowed_packet = 16M [mysql] no-auto-rehash # Remove the next comment character if you
are not familiar with SQL #safe-updates [isamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [myisamchk] key_buffer = 20M sort_buffer_size = 20M read_buffer = 2M write_buffer = 2M [mysqlhotcopy] interactive-timeout #---------- # # This was formally known as
[safe_mysqld]. Both versions are currently parsed. #[mysqld_safe] #socket = /var/run/mysqld/mysqld.sock #nice = -5 # # If you want to enable SSL support
(recommended) read the manual or my # HOWTO in
/usr/share/doc/mysql-server/SSL-MINI-HOWTO.txt # ssl-ca=/etc/mysql/cacert.pem # ssl-cert=/etc/mysql/server-cert.pem # ssl-key=/etc/mysql/server-key.pem ## Mail Volume Settings #wait_timeout=120 ********** END FILE *********** From: Acecomp Plus
[mailto:mike@acecompplus.org] Username and password keeps popping up when users send
email. Postfix, SASL with MySQL O/S Debian 3.1 Sarge System: 1 Gig Memory, Dual PIII 900 We currently have about 500 email accounts using postfix/mysql
and most of the time email sends fine without a problem. However we are having
an issue with username and password prompting users a few times a day when
sending email. I have been monitoring the load on the server using top and
normally load is between 0.02 – 1.65 (I have been told SASL will stop
when load above 2.00 (Can this be increased)) I have also noticed this happened when load was only 0.12 so
it maybe some maximum connections setting in mysql or sasl. Does any one know what may cause this. Regards Michael Taylor |