Tenho um problemao pra resolver,
tenho um servidor dedicado MySQL na fundação onde trabalho,
só que ele tá com muito SWAP conforme relatórios abaixo.
Alguem poderia me dizer o que eu poderia fazer pra melhorar a
performance desse servidor.
Mémoria para ele tá muito cara e dificil de encontrar. Alem disso o
servidor aceita apenas
2GB de RAM, ele já tem 1GB.
Tem todas as informações abaixo, configuração do servidor, versão do
MySQL, comando TOP e DF,
e o arquivo MY.CNF.
Agradeço qualquer ajuda, pois estou desesperado...hehe
Abraços a todos.
Márcio Erli
-----------------------------------------------top-----------------------------------------
top - 08:42:02 up 1 day, 14:20, 1 user, load average: 0.30, 0.34, 0.29
Tasks: 66 total, 1 running, 65 sleeping, 0 stopped, 0 zombie
Cpu(s): 29.0% us, 12.0% sy, 0.0% ni, 28.6% id, 28.8% wa, 0.3% hi, 1.3% si
Mem: 1032388k total, 1008636k used, 23752k free, 23800k buffers
Swap: 1317288k total, 341696k used, 975592k free, 308188k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17576 mysql 18 0 478m 436m 5248 D 57.3 43.3 0:07.04 mysqld
17571 mysql 16 0 478m 436m 5248 S 17.5 43.3 0:06.34 mysqld
17558 mysql 15 0 478m 436m 5248 S 7.1 43.3 0:07.15 mysqld
968 snort 15 0 31720 1704 2316 S 1.9 0.2 6:03.29 snort
28 root 15 0 0 0 0 D 1.0 0.0 0:51.01 kjournald
17583 root 16 0 2172 1032 1964 R 0.6 0.1 0:00.02 top
17580 mysql 16 0 478m 436m 5248 S 0.3 43.3 0:00.06 mysqld
1 root 16 0 1580 80 1424 S 0.0 0.0 0:02.05 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/1
5 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/1
6 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0
7 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 events/1
8 root 5 -10 0 0 0 S 0.0 0.0 0:03.41 kblockd/0
9 root 5 -10 0 0 0 S 0.0 0.0 0:04.05 kblockd/1
10 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kirqd
13 root 15 0 0 0 0 S 0.0 0.0 0:17.09 kswapd0
14 root 10 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
15 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 aio/1
17 root 25 0 0 0 0 S 0.0 0.0 0:00.13 kseriod
21 root 25 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
22 root 15 0 0 0 0 S 0.0 0.0 0:00.00 ahc_dv_0
23 root 18 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_1
24 root 15 0 0 0 0 S 0.0 0.0 0:00.00 ahc_dv_1
134 root 20 0 2036 356 1588 S 0.0 0.0 0:00.24 devfsd
223 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd
365 root 15 0 0 0 0 S 0.0 0.0 0:04.92 kjournald
366 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
932 root 16 0 1640 236 1468 S 0.0 0.0 0:00.06 syslogd
940 root 16 0 2512 40 1416 S 0.0 0.0 0:00.12 klogd
954 daemon 16 0 1616 104 1456 S 0.0 0.0 0:00.00 atd
1002 root 17 0 3152 216 2940 S 0.0 0.0 0:00.53 sshd
1023 root 16 0 2164 44 1828 S 0.0 0.0 0:00.00 xinetd
1091 nobody 16 0 4500 216 3788 S 0.0 0.0 0:00.03 proftpd
1106 root 16 0 1624 148 1460 S 0.0 0.0 0:00.01 crond
1122 root 19 0 2228 40 2096 S 0.0 0.0 0:00.01 mysqld_safe
1174 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.79 mysqld
1194 root 17 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1195 root 17 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1198 root 16 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1199 root 16 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1200 root 16 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1201 root 19 0 1568 36 1408 S 0.0 0.0 0:00.00 mingetty
1202 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.29 mysqld
1203 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.01 mysqld
1204 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.59 mysqld
1205 mysql 16 0 478m 436m 5248 S 0.0 43.3 2:14.95 mysqld
1206 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:06.11 mysqld
1229 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.73 mysqld
1230 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:03.10 mysqld
1231 mysql 16 0 478m 436m 5248 D 0.0 43.3 0:15.33 mysqld
1232 mysql 16 0 478m 436m 5248 S 0.0 43.3 0:00.78 mysqld
------------------------------------------------my.cnf---------------------------------------------------
[EMAIL PROTECTED] root]# cat /etc/my.cnf
# 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)
#
# You can copy this file to
# /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options (in this
# installation this directory is /var/lib/mysql) or
# ~/.my.cnf to set user-specific options.
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.
# The following options will be passed to all MySQL clients
[client]
#password = your_password
port = 3306
socket = /var/lib/mysql/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
port = 3306
socket = /var/lib/mysql/mysql.sock
datadir = /var/lib/mysql
skip-locking
#key_buffer = 16M
key_buffer = 2M
max_allowed_packet = 1M
#table_cache = 64
table_cache = 128
#sort_buffer_size = 512K
sort_buffer_size = 2M
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
#myisam_sort_buffer_size = 8M
myisam_sort_buffer_size = 100K
#datadir = /var/lib/mysql
socket = /var/lib/mysql/mysql.sock
language=/usr/share/mysql/portuguese/
# Adicionado em 25/05/2006 devido a excesso de conexoes
max_connections = 1000
max_connect_errors = 1000
wait_timeout = 300
# MySQL Brasil - BH
# log=/var/lib/mysql/mysqld.log
log-slow-queries
log-long-format
long-query-time=5
# 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
# 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/
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 = ibdata1:100M;ibdata2:100M: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_buffer_pool_size = 400M
#innodb_additional_mem_pool_size = 2M
innodb_additional_mem_pool_size = 20M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
innodb_log_file_size = 10M
#innodb_log_buffer_size = 8M
innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
[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 = 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
[mysqladmin]
socket=/var/lib/mysql/mysql.sock
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