mysql错误日志及sql日志的区别

my.ini

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[client]
port=3306
[mysql]
default-character-set=utf8

[mysqld]
port=3306
basedir="E:/phpStudy/MySQL/"
datadir="E:/phpStudy/MySQL/data/"
general_log=1
general_log_file="F:/data/mysql/sql.log"
log-error="F:/data/mysql/mysql.err"
character-set-server=utf8
default-storage-engine=MyISAM
sql-mode="NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
max_connections=512

query_cache_size=0
table_cache=256
tmp_table_size=18M

thread_cache_size=8
myisam_max_sort_file_size=64G
myisam_sort_buffer_size=35M
key_buffer_size=25M
read_buffer_size=64K
read_rnd_buffer_size=256K
sort_buffer_size=256K

innodb_additional_mem_pool_size=2M

innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=1M

innodb_buffer_pool_size=47M
innodb_log_file_size=24M
innodb_thread_concurrency=8

#2006 - MySQL server has gone away 问题解决方法
max_allowed_packet=5120M
wait_timeout=288000
interactive_timeout=288000

log-error msyql错误日志有操做系统写入，记录mysql启动、退出的日志，my.ini或命令行下临时对log-error作配置，默认在mysql的数据目录下产生hostname.err文件如：

E:\phpStudy\MySQL\data\DESKTOP-I4OIMJC.err

 

sql错误日志由mysqld进程写入，记录mysql执行过的全部sql。调试过程当中，若是应用程序由于sql错误致使，能够tail -f 跟踪到最后一条sql，即报错sql。以前sql不可能错误，若是以前sql错误，后面sql正常状况下应该执行不到，（小几率状况下有可能，程序try catch对异常作了不中断程序继续执行的处理）