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MySQL ALTER 出现 Waiting for table metadata lock. 今天给Mysql数据库某表加一条索引时此表数据并不大 ,等了20分钟也没有完成, 环境是MySQL版本为5.6.17. 于是登录db使用show processlist查看时发现执行的SQL STATUS 是 Waiting for table metadata lock. Show engine innodb status. Kill pid ;. 然后再次执行 ALTER TABLE `mall activity product` ADD INDEX `source` (`source`);. 过后总结造成次问题的原因是某个事物因为某种原因一直没提交，造成锁表，一般alter table的操作过程中，在after create步骤会获取metadata 独占锁，当进行到altering table的过程时通常是最花时间的步骤，对该表的读写都可以正常进行,如果发生读写失败，或者等待较长时间，可能存表表所。 Linux 系统中常用shell变量$#,$@,$0,$1,$2的含义解释.

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MySQL ALTER 出现 Waiting for table metadata lock. 今天给Mysql数据库某表加一条索引时此表数据并不大 ,等了20分钟也没有完成, 环境是MySQL版本为5.6.17. 于是登录db使用show processlist查看时发现执行的SQL STATUS 是 Waiting for table metadata lock. Show engine innodb status. Kill pid ;. 然后再次执行 ALTER TABLE `mall activity product` ADD INDEX `source` (`source`);. 过后总结造成次问题的原因是某个事物因为某种原因一直没提交，造成锁表，一般alter table的操作过程中，在after create步骤会获取metadata 独占锁，当进行到altering table的过程时通常是最花时间的步骤，对该表的读写都可以正常进行,如果发生读写失败，或者等待较长时间，可能存表表所。 Linux 系统中常用shell变量$#,$@,$0,$1,$2的含义解释.

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MySQL ALTER 出现 Waiting for table metadata lock. 今天给Mysql数据库某表加一条索引时此表数据并不大 ,等了20分钟也没有完成, 环境是MySQL版本为5.6.17. 于是登录db使用show processlist查看时发现执行的SQL STATUS 是 Waiting for table metadata lock. Show engine innodb status. Kill pid ;. 然后再次执行 ALTER TABLE `mall activity product` ADD INDEX `source` (`source`);. 过后总结造成次问题的原因是某个事物因为某种原因一直没提交，造成锁表，一般alter table的操作过程中，在after create步骤会获取metadata 独占锁，当进行到altering table的过程时通常是最花时间的步骤，对该表的读写都可以正常进行,如果发生读写失败，或者等待较长时间，可能存表表所。 Linux 系统中常用shell变量$#,$@,$0,$1,$2的含义解释.

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Netstat -n awk '/ tcp/ { state[$NF]} END {for(key in state) print key," t",state[key]}'. Django 1.10.5安装xadmin.

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linux sed 指定行插入内容 – 普拉多VX

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A 追加内容 sed ‘/匹配词/a 要加入的内容’ example.file 将内容追加到匹配的目标行的下一行位置. I 插入内容 sed ‘/匹配词/i 要加入的内容’ example.file 将内容插入到匹配的行目标的上一行位置. 我要把文件的包含 roddypy.com 这个关键词的行前或行后加入一行，内容为 welcome to roddpy.com. Sed -i ‘/roddypy.com/i welcome to roddpy.com’ the.conf.file. Sed -i ‘/roddypy.com/a welcome to roddpy.com’ the.conf.file. Sed -i ‘/内容1/,/ /内容2/d’ test.file. Nginx lua 灰度发布 →. Django 1.10.5安装xadmin.

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python开发 – 普拉多VX

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Read More ». 操作系统环境 1.Centos 7 2.Python 2.7 3.RabbitMQ-server 3.3. […]. Read More ». 源地址 https:/ pypi.douban.com/simple/ 使用 pip install -i h […]. Read More ». Pycharm professional 2016.2.3激活码. Read More ». Read More ». 一、子类与父类什么是子类呢一个类可以把另一个类当成父类，其它叫法又叫做基类，子类又可以叫派生类，其实意思都 […]. Read More ». Read More ». 连接redis cl […]. Read More ». Read More ». Read More ». Django 1.10.5安装xadmin.

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Read More ». 安装expect yum install expect -y 1.编写except脚本 [root@local […]. Read More ». 最近在研究jenkins，现把整个流程及主要更新实现方法做个总结架构图 1.Jenkins安 […]. Read More ». 目前工作现状研发开发-打包-交给运维-运维部署-进行测试为解决此问题，研究了一段时间jenkins作持续集 […]. Read More ». Read More ». Read More ». Returners 是saltstack对minion执行操作后，对返回的数据进行存储，可以存储到一个文件或者 […]. Read More ». Salt本身内置了许多的模块，我们在前面已经基本使用过了，我们现在来大概看下，salt内置模块的使用方式 sa […]. Read More ». Read More ». Read More ». Django 1.10.5安装xadmin.

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linux运维 – 普拉多VX

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Read More ». A 追加内容 sed ‘/匹配词/a 要加入的内容’ example.file 将内容追加到匹配的目标行的下一 […]. Read More ». Netstat -n awk ‘/ tcp/ { state[$NF]} END {for(key in […]. Read More ». 使用工具jq https:/ stedolan.github.io/jq/ 下载版本linux版本 jq-li […]. Read More ». 今天突然在使用一台服务器上的vim时，空格全部显示高亮了，瞬间亮瞎了眼解决方法 1.临 […]. Read More ». Postgresql pg stat activity 表说明. 查询pg stat activity表可以查看当前Postgresql数据库的当前会话活动进程的一些信息，比如 […]. Read More ». Nginx 健康检查模块 nginx upstream check module. Read More ». Read More ». Read More ». Read More ».

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SimpletourDevops运维系统 – 普拉多VX

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开源地址 https:/ github.com/roddyofchina/SimpletourDevops. Linux sed 指定行插入内容 →. Django 1.10.5安装xadmin.

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在centos 6.5 docker 退出后虚拟机崩溃. 问题描述以前在线上运行docker都没有遇到使用ctrl d 或者exit 后机器出现崩溃的情况，今天在我P […]. Read More ». Read More ». Read More ». 今天在centos 6.5 x86-64环境下新部署了个docker环境。 Read More ». Read More ». Read More ». Read More ». Docker三大核心 1.镜像 2.容器 &nbsp […]. Read More ». Docker介绍 Docker是一个开源的云项目，诞生于 […]. Read More ». Read More ». Django 1.10.5安装xadmin.

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django开发 – 普拉多VX

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Read More ». 参考文档 http:/ django-simple-captcha.readthedocs.io/en/lat […]. Read More ». Django 1.10.5安装xadmin. 安装xadmin 1.使用源码安装 https:/ codeload.github.com/sshwsfc/x […]. Read More ». 开源地址 https:/ github.com/roddyofchina/SimpletourDevops & […]. Read More ». 问题说明 https:/ github.com/duanhongyi/dwebsocket/issues/1 […]. Read More ». 样例 1234<input type=text name= […]. Read More ». Read More ». 在模型中使用了choices u status = ( (1, ‘在职’), (2, ‘离职’), ) sta […]. Read More ». Read More ». Read More ».

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nginx lua 灰度发布 – 普拉多VX

http://www.roddypy.com/index.php/2016/12/27/nginx-lua-灰度发布

2通过jenkins and maven tools to build app. Https:/ github.com/openresty/lua-nginx-module/archive/v0.9.19.tar.gz. Https:/ github.com/simpl/ngx devel kit/archive/v0.3.0.tar.gz. Yum -y install gd gd2 gd-devel gd2-devel lua lua-devel 配置lua支持. Root@localhost soft]# tar zxf v0.3.0.tar.gz [root@localhost soft]# tar zxf v0.9.19.tar.gz. Root@localhost nginx-1.8.0]#./configure - prefix=/usr/local/nginx - user=www - group=www - with-http ssl module - with-http stub status module - with-file-aio - with-htt...

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