[Warning] Aborted connection 56733

[Warning] Aborted connection 56733

by Tristan Rabine -
Number of replies: 2

110418 2:38:04 [Warning] Aborted connection 56732 to db: 'elearning' user: 'root' host: 'localhost' (Got timeout reading communication packets)
110418 2:38:25 [Warning] Aborted connection 56733 to db: 'elearning' user: 'root' host: 'localhost' (Got timeout reading communication packets)
110418 11:28:30 [Warning] Aborted connection 87492 to db: 'unconnected' user: 'root' host: 'localhost' (Got timeout reading communication packets)

I have been getting these in my mysqld.log for awhile and what I seem to get from google searches is slow DB performance. I have adjusted the db settings to allow a lot more memory. I don't think this is my problem  anymore though. When usage is high then mysql will restart occasionaly.

I have a red hat EL 5 32bit server running on a vmware vphere host. The host has a quad core cpu @2.5ghz (two allocated to elearning), 16gb memory (3gb allocated). We have about 1,600 users only about 30-100 are logged in.

Mysql version 5.0.77
Apache-2.2.3
php-mysql-5.1.6
Moodle 1.9.10+ (Build: 20101222) MyiSam

Kind of hopeing somone can point me in the correct direction to getting this resolved.

Average of ratings: -
In reply to Tristan Rabine

Re: [Warning] Aborted connection 56733

by Tristan Rabine -

Here is my my.cnf

# The MySQL server
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
skip-locking
key_buffer = 256M
max_allowed_packet = 64M
table_cache = 3072
sort_buffer_size = 8M
read_buffer_size = 8M
read_rnd_buffer_size = 8M
myisam_sort_buffer_size = 128M
thread_cache_size = 256

#Query Cache
query_cache_size = 96M
query_cache_min_res_unit = 1k
query_cache_limit = 4M


#Temp Tables
max_heap_table_size = 384M
tmp_table_size = 384M

#Joins
join_buffer_size=1

#Time Outs
interactive_timeout = 100
wait_timeout = 100
connect_timeout = 30

# Try number of CPU's*2 for thread_concurrency
thread_concurrency = 4

# Maximum connections allowed
max_connections = 300
max_user_connections=0
max_connect_errors = 10

# 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

# Replication Master Server (default)
# binary logging is required for replication
#log-bin=mysql-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=mysql-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 = 64M
#bdb_max_lock = 100000

# 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 = 256M
#innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 64M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50

#Enter a name for the error log file. Otherwise a default name will be used.
log-error=/var/log/mysql.err

#Slow queries
log-slow-queries=/var/log/mysqld.slow
long_query_time = 15

#Log queries that are executed without benefit of any index.
log-queries-not-using-indexes

#Log some not critical warnings to the log file.
log-warnings

#open files limit 2-3 times table cache size
open_files_limit = 9228

[safe_mysqld]
err-log=/var/log/mysqld.log
#pid-file=/var/run/mysqld/mysqld.pid
#open_files_limit=8192

[mysqldump]
quick
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 = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M

[myisamchk]
key_buffer = 128M
sort_buffer_size = 128M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

In reply to Tristan Rabine

Re: [Warning] Aborted connection 56733

by sakai user -

Here is what is filling up your log.

[code]
interactive_timeout = 100    <<< this is seconds
log-warnings
[/code]

 

When you get a chance (like NOW) make the switch to Innodb engine for your database...

 

-- Kevin