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光坂学士生
光坂学士生
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[悲剧]有懂mysql不?

楼主#
更多 发布于:2011-04-21 08:15
对照着phpmyadmin里显示的进程信息调试了一天,也百度谷歌了一天,最后还是没有解决,于是求高手来帮忙看看,这种高科技的东西对我来说实在太杀脑细胞了。
(昨天和今天频繁的打不开就是我在不停的重启数据库进程和调节各种参数造成的)







现在的my.ini配置如下:
# MySQL Server Instance Configuration File
# ----------------------------------------------------------------------
# Generated by the MySQL Server Instance Configuration Wizard
#
#
# Installation Instructions
# ----------------------------------------------------------------------
#
# On Linux you can copy this file to /etc/my.cnf to set global options,
# mysql-data-dir/my.cnf to set server-specific options
# (@localstatedir@ for this installation) or to
# ~/.my.cnf to set user-specific options.
#
# On Windows you should keep this file in the installation directory 
# of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
# make sure the server reads the config file use the startup option 
# "--defaults-file". 
#
# To run run the server from the command line, execute this in a 
# command line shell, e.g.
# mysqld --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# To install the server as a Windows service manually, execute this in a 
# command line shell, e.g.
# mysqld --install MySQLXY --defaults-file="C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
#
# And then execute this in a command line shell to start the server, e.g.
# net start MySQLXY
#
#
# Guildlines for editing this file
# ----------------------------------------------------------------------
#
# In this file, you can use all long options that the program supports.
# If you want to know the options a program supports, start the program
# with the "--help" option.
#
# More detailed information about the individual options can also be
# found in the manual.
#
#
# CLIENT SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by MySQL client applications.
# Note that only client applications shipped by MySQL are guaranteed
# to read this section. If you want your own MySQL client program to
# honor these values, you need to specify it as an option during the
# MySQL client library initialization.
#
[client]

port=3306

[mysql]

default-character-set=gbk


# SERVER SECTION
# ----------------------------------------------------------------------
#
# The following options will be read by the MySQL Server. Make sure that
# you have installed the server correctly (see above) so it reads this 
# file.
#
[mysqld]
max_allowed_packet=32M
wait_timeout=288000
interactive_timeout = 288000

# The TCP/IP Port the MySQL Server will listen on
port=3306


#Path to installation directory. All paths are usually resolved relative to this.
basedir="H:/mysql5.5/"

#Path to the database root
datadir="H:/mysql5.5/Data/"

# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=gbk

# The default storage engine that will be used when create new tables when
default-storage-engine=INNODB

# Set the SQL mode to strict
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# The maximum amount of concurrent sessions the MySQL server will
# allow. One of these connections will be reserved for a user with
# SUPER privileges to allow the administrator to login even if the
# connection limit has been reached.
max_connections=1510

# Query cache is used to cache SELECT results and later return them
# without actual executing the same query once again. Having the query
# cache enabled may result in significant speed improvements, if your
# have a lot of identical queries and rarely changing tables. See the
# "Qcache_lowmem_prunes" status variable to check if the current value
# is high enough for your load.
# Note: In case your tables change very often or if your queries are
# textually different every time, the query cache may result in a
# slowdown instead of a performance improvement.
query_cache_size=128M

# The number of open tables for all threads. Increasing this value
# increases the number of file descriptors that mysqld requires.
# Therefore you have to make sure to set the amount of open files
# allowed to at least 4096 in the variable "open-files-limit" in
# section [mysqld_safe]
table_cache=3020

# Maximum size for internal (in-memory) temporary tables. If a table
# grows larger than this value, it is automatically converted to disk
# based table This limitation is for a single table. There can be many
# of them.
tmp_table_size=64M


# How many threads we should keep in a cache for reuse. When a client
# disconnects, the client's threads are put in the cache if there aren't
# more than thread_cache_size threads from before.  This greatly reduces
# the amount of thread creations needed if you have a lot of new
# connections. (Normally this doesn't give a notable performance
# improvement if you have a good thread implementation.)
thread_cache_size=64

#*** MyISAM Specific options

# The maximum size of the temporary file MySQL is allowed to use while
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.
# If the file-size would be bigger than this, the index will be created
# through the key cache (which is slower).
myisam_max_sort_file_size=100G

# If the temporary file used for fast index creation would be bigger
# than using the key cache by the amount specified here, then prefer the
# key cache method.  This is mainly used to force long character keys in
# large tables to use the slower key cache method to create the index.
myisam_sort_buffer_size=64M

# Size of the Key Buffer, used to cache index blocks for MyISAM tables.
# Do not set it larger than 30% of your available memory, as some memory
# is also required by the OS to cache rows. Even if you're not using
# MyISAM tables, you should still set it to 8-64M as it will also be
# used for internal temporary disk tables.
key_buffer_size=64M

# Size of the buffer used for doing full table scans of MyISAM tables.
# Allocated per thread, if a full scan is needed.
read_buffer_size=4M
read_rnd_buffer_size=32M

# This buffer is allocated when MySQL needs to rebuild the index in
# REPAIR, OPTIMZE, ALTER table statements as well as in LOAD DATA INFILE
# into an empty table. It is allocated per thread so be careful with
# large settings.
sort_buffer_size=64M


#*** INNODB Specific options ***
innodb_data_home_dir="H:/MySQL5.5 Datafiles/"

# Use this option if you have a MySQL server with InnoDB support enabled
# but you do not plan to use it. This will save memory and disk space
# and speed up some things.
#skip-innodb

# Additional memory pool that is used by InnoDB to store metadata
# information.  If InnoDB requires more memory for this purpose it will
# start to allocate it from the OS.  As this is fast enough on most
# recent operating systems, you normally do not need to change this
# value. SHOW INNODB STATUS will display the current amount used.
innodb_additional_mem_pool_size=32M

# If set to 1, InnoDB will flush (fsync) the transaction logs to the
# disk at each commit, which offers full ACID behavior. If you are
# willing to compromise this safety, and you are running small
# transactions, you may set this to 0 or 2 to reduce disk I/O to the
# logs. Value 0 means that the log is only written to the log file and
# the log file flushed to disk approximately once per second. Value 2
# means the log is written to the log file at each commit, but the log
# file is only flushed to disk approximately once per second.
innodb_flush_log_at_trx_commit=1

# The size of the buffer InnoDB uses for buffering log data. As soon as
# it is full, InnoDB will have to flush it to disk. As it is flushed
# once per second anyway, it does not make sense to have it very large
# (even with long transactions).
innodb_log_buffer_size=8M

# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and
# row data. The bigger you set this the less disk I/O is needed to
# access data in tables. On a dedicated database server you may set this
# parameter up to 80% of the machine physical memory size. Do not set it
# too large, though, because competition of the physical memory may
# cause paging in the operating system.  Note that on 32bit systems you
# might be limited to 2-3.5G of user level memory per process, so do not
# set it too high.
innodb_buffer_pool_size=1G

# Size of each log file in a log group. You should set the combined size
# of log files to about 25%-100% of your buffer pool size to avoid
# unneeded buffer pool flush activity on log file overwrite. However,
# note that a larger logfile size will increase the time needed for the
# recovery process.
innodb_log_file_size=71M

# Number of threads allowed inside the InnoDB kernel. The optimal value
# depends highly on the application, hardware as well as the OS
# scheduler properties. A too high value may lead to thread thrashing.
innodb_thread_concurrency=8
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千寻海
光坂学士生
光坂学士生
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沙发#
发布于:2011-04-21 09:27
嘛 看这意思 是缓存太小
你这段代码的150行
150.key_buffer_size=64M
适当的改大一些

具体多少要看情况吧
http://database.51cto.com/art/201010/229939.htm


这个是key buffer 缓存的原理 http://ourmysql.com/archives/660
如果你的表没放到这个key buffer里  搜索时还是会直接从硬盘读取
你没新建表或者修改数据库结构的话 应该没问题 = =

总之key buffer size 提示太小 一种是你的数值确实设置小 另一种是你的表索引没做好也就是表的结构问题或者查询语句没做好索引
关于怎么判断看第一个链接吧

mysql 我也不是高手╮(╯_╰)╭
我叫小千 其他称呼都是浮云。我有三个可爱的妹妹 乖巧的牛奶、聪明的小睿、傲娇的小碗 -------千寻海 img]http://www.dmdjz.com.cn/attachment/Fid_7/7_18549_c452b197570a46e.jpg[/img]
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bleen
光坂学士生
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2楼#
发布于:2011-04-21 11:15
这方面不懂,还没学,一直用MS的,支持妹抖前辈高人无节操。。。
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琥珀
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3楼#
发布于:2011-04-21 11:26
网络语言和编程语言差别这么大么~我表示感觉就像在看英文文章一样!
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c.囊
光坂二年生
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4楼#
发布于:2011-04-21 11:40
这个看了好不熟悉的
“我希望可以伴在你的身边,完成你想要的的所有愿望。”在一个星光灿烂的夜晚,男孩对女孩说道。 “如果我要天上的星星呢?”仰望星空,像是要留住那经由千百亿年时光穿越而来的神秘光线一般,女孩儿举手轻掬。 “这超出了我的能力范围,不过,如果你愿意,我可以将脚下的这颗绿色行星献给你。”男孩的回答没有半点犹豫。
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mooncrazy
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5楼#
发布于:2011-04-21 12:16
计算机盲飘过啊
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ct一剑
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6楼#
发布于:2011-04-21 14:36
不同语言间差别好大啊....完全不懂
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风化的羽翼
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7楼#
发布于:2011-04-21 18:37
= =被标题骗了
完全不懂。。
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影风秦
光坂国中生
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8楼#
发布于:2011-04-22 17:29
看这个没有元音的字母我就晕了 编程果然不简单%……
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白の闇
光坂二年生
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9楼#
发布于:2011-04-22 22:06
虽然我有学过SQL Server,但是 表示 坚决看不懂
没办法,谁叫老师只教了我们增删查改呢,我表示很无力
[IMG]http://storage.live.com/items/4EEB6524C170617C%21185?filename=sign.png[/IMG]
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豆腐
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10楼#
发布于:2011-04-26 16:53
完全没有看懂,我现在只会C语言
[IMG]http://img4.picbed.org/uploads/2012/09/3801213fb80e7bec3eb5235a2f2eb9389b506b19.jpg[/IMG]
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