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Очень долгие UPDATE/INSERT

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Привет всем! Один UPDATE в транзакции практически пустой таблички длится аж 0.04...0.05 секунд! http://dumpz.org/681509/

Кол-во записей:

MariaDB [evilworlds2]> SELECT COUNT(*) FROM users; 
+----------+
| COUNT(*) |
+----------+
|        4 |
+----------+
1 row in set (0.00 sec)

Таблица:

CREATE TABLE `users` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `nick` varchar(32) NOT NULL,
  `password` char(32) NOT NULL,
  `salt` char(32) NOT NULL,
  `group_id` int(10) unsigned NOT NULL DEFAULT '0',
  `group_icon_id` tinyint(4) unsigned NOT NULL DEFAULT '0',
  `reg_time` int(10) unsigned NOT NULL DEFAULT '0',
  `last_time` int(10) unsigned NOT NULL DEFAULT '0',
  `online_time` int(10) unsigned NOT NULL DEFAULT '0',
  `place` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `place_object_id` int(10) unsigned NOT NULL DEFAULT '0',
  `sex` tinyint(3) unsigned NOT NULL DEFAULT '0',
  `birthday` date NOT NULL DEFAULT '0000-00-00',
  PRIMARY KEY (`id`),
  KEY `group_id` (`group_id`),
  KEY `nick` (`nick`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8 TRANSACTIONAL=1

Машина - джва ядра amd athlon 2.82 GHz, 6 Gb ram.

iowait:

azq2@zhumarin:~/svn/evilnative/branches/0.0.1$ iostat
Linux 3.8.0-28-generic (zhumarin) 	26.09.2013 	_x86_64_	(2 CPU)

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          16,89    0,14    5,54    1,63    0,00   75,81

Device:            tps    kB_read/s    kB_wrtn/s    kB_read    kB_wrtn
sda              15,56        72,21       214,04    3794697   11247544

my.cnf

# MariaDB database server configuration file.
#
# You can copy this file to one of:
# - "/etc/mysql/my.cnf" to set global options,
# - "~/.my.cnf" to set user-specific options.
# 
# One can use all long options that the program supports.
# Run program with --help to get a list of available options and with
# --print-defaults to see which it would actually understand and use.
#
# For explanations see
# http://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients
# It has been reported that passwords should be enclosed with ticks/quotes
# escpecially if they contain "#" chars...
# Remember to edit /etc/mysql/debian.cnf when changing the socket location.
[client]
port		= 3306
socket		= /var/run/mysqld/mysqld.sock

# Here is entries for some specific programs
# The following values assume you have at least 32M ram

# This was formally known as [safe_mysqld]. Both versions are currently parsed.
[mysqld_safe]
socket		= /var/run/mysqld/mysqld.sock
nice		= 0

[mysqld]
#
# * Basic Settings
#
user		= mysql
pid-file	= /var/run/mysqld/mysqld.pid
socket		= /var/run/mysqld/mysqld.sock
port		= 3306
basedir		= /usr
datadir		= /var/lib/mysql
tmpdir		= /tmp
lc_messages_dir	= /usr/share/mysql
lc_messages	= en_US
skip-external-locking
#
# Instead of skip-networking the default is now to listen only on
# localhost which is more compatible and is not less secure.
bind-address		= 127.0.0.1
#
# * Fine Tuning
#
max_connections		= 100
connect_timeout		= 5
wait_timeout		= 600
max_allowed_packet	= 16M
thread_cache_size       = 128
sort_buffer_size	= 4M
bulk_insert_buffer_size	= 16M
tmp_table_size		= 32M
max_heap_table_size	= 32M
#
# * MyISAM
#
# This replaces the startup script and checks MyISAM tables if needed
# the first time they are touched. On error, make copy and try a repair.
myisam_recover          = BACKUP
key_buffer_size		= 256M
#open-files-limit	= 2000
table_open_cache	= 400
myisam_sort_buffer_size	= 512M
concurrent_insert	= 2
read_buffer_size	= 20M
read_rnd_buffer_size	= 10M
#
# * Query Cache Configuration
#
# Cache only tiny result sets, so we can fit more in the query cache.
query_cache_limit		= 128K
query_cache_size		= 64M
# for more write intensive setups, set to DEMAND or OFF
#query_cache_type		= DEMAND
#
# * Logging and Replication
#
# Both location gets rotated by the cronjob.
# Be aware that this log type is a performance killer.
# As of 5.1 you can enable the log at runtime!
#general_log_file        = /var/log/mysql/mysql.log
#general_log             = 1
#
# Error logging goes to syslog due to /etc/mysql/conf.d/mysqld_safe_syslog.cnf.
#
# we do want to know about network errors and such
log_warnings		= 2
#
# Enable the slow query log to see queries with especially long duration
#slow_query_log[={0|1}]
slow_query_log_file	= /var/log/mysql/mariadb-slow.log
long_query_time = 10
#log_slow_rate_limit	= 1000
log_slow_verbosity	= query_plan

#log-queries-not-using-indexes
#log_slow_admin_statements
#
# The following can be used as easy to replay backup logs or for replication.
# note: if you are setting up a replication slave, see README.Debian about
#       other settings you may need to change.
#server-id		= 1
#report_host		= master1
#auto_increment_increment = 2
#auto_increment_offset	= 1
log_bin			= /var/log/mysql/mariadb-bin
log_bin_index		= /var/log/mysql/mariadb-bin.index
# not fab for performance, but safer
#sync_binlog		= 1
expire_logs_days	= 10
max_binlog_size         = 100M
# slaves
#relay_log		= /var/log/mysql/relay-bin
#relay_log_index	= /var/log/mysql/relay-bin.index
#relay_log_info_file	= /var/log/mysql/relay-bin.info
#log_slave_updates
#read_only
#
# If applications support it, this stricter sql_mode prevents some
# mistakes like inserting invalid dates etc.
#sql_mode		= NO_ENGINE_SUBSTITUTION,TRADITIONAL
#
# * InnoDB
#
# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.
# Read the manual for more InnoDB related options. There are many!
default_storage_engine	= InnoDB
# you can't just change log file size, requires special procedure
#innodb_log_file_size	= 50M
innodb_buffer_pool_size	= 256M
innodb_log_buffer_size	= 8M
innodb_file_per_table	= 1
innodb_open_files	= 400
innodb_io_capacity	= 400
innodb_flush_method	= O_DIRECT
innodb_flush_log_at_trx_commit = 0
#
# * Security Features
#
# Read the manual, too, if you want chroot!
# chroot = /var/lib/mysql/
#
# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".
#
# ssl-ca=/etc/mysql/cacert.pem
# ssl-cert=/etc/mysql/server-cert.pem
# ssl-key=/etc/mysql/server-key.pem



[mysqldump]
quick
quote-names
max_allowed_packet	= 16M

[mysql]
#no-auto-rehash	# faster start of mysql but no tab completition

[isamchk]
key_buffer		= 16M

#
# * IMPORTANT: Additional settings that can override those from this file!
#   The files must end with '.cnf', otherwise they'll be ignored.
#
!includedir /etc/mysql/conf.d/

Это нормально?


я полагаю инсерты столько же длятся? это mysql пишет на диск, гугли что то вроде асинхронных коммитов

disarmer ★★★ ()
Ответ на: комментарий от disarmer

Myisam летает. Раз в 100 точно быстрее.

anonymous ()

А если попробовать дропнуть индексы, кроме первичного ключа, перед инсертами.

looper ()

кмк, это время которое нужно чтобы транзакция на винт попала. Ты можешь подкрутить некоторые параметры innodb в ущерб консистентности базы если она упадёт или свет моргнёт.

true_admin ★★★★★ ()
Ответ на: комментарий от vurdalak

М/Ж/гермафродит

«М»/«Ж»/«Гермафродит»/«Не определился»/«Предпочитаю умолчать» же!

tailgunner ★★★★★ ()
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