Can't connect to MySQL server Lost connection to MySQL server during query · Issue #269 · PyMySQL/PyMySQL https://github.com/PyMySQL/PyMySQL/issues/269

Hey all -

I was able to track down my issue with the help of amazon engineers.
We use an RDS as our backend MySQL server and we were sending too many connections for the RDS to handle.

The default somaxconn value for an amazon RDS instance is 128 and they bumped it up to 1024 for us.

After the change we've been good.

Here's a little bit more explanation:

/proc/sys/net/core/somaxconn: Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128. The value should be raised substantially to support bursts of request. For example, to support a burst of 1024 requests, set somaxconn to 1024.

https://computing.llnl.gov/linux/slurm/high_throughput.html

Linux Clusters Overview https://computing.llnl.gov/tutorials/linux_clusters/

Lost connection to MySQL server during query ([Errno 104] Connection reset by peer)的更多相关文章

  1. Error NO.2013 Lost connection to Mysql server during query

    系统:[root@hank-yoon ~]# cat /etc/redhat-release CentOS release 6.3 (Final) DB版本:mysql> select @@ve ...

  2. MySQL查询过程中出现lost connection to mysql server during query 的解决办法

    window7 64位系统,MySQL5.7 问题:在使用shell进行数据表更新操作的过程,输入以下查询语句: ,; 被查询的表记录数达到500W条,在查询过程中出现如题目所示的问题,提示" ...

  3. MySQL5.1升级5.6后，执行grant出错：ERROR 2013 (HY000): Lost connection to MySQL server during query【转载】

    转载: MySQL5.5升级5.6后,执行grant出错:ERROR 2013 (HY000): Lost connection to -mysql教程-数据库-壹聚教程网http://www.111 ...

  4. Procedure execution failed 2013 - Lost connection to MySQL server during query

    1 错误描述 Procedure execution failed 2013 - Lost connection to MySQL server during query 2 错误原因 由错误描述可知 ...

  5. MySQL中查询时"Lost connection to MySQL server during query"报错的解决方案

    一.问题描述: mysql数据库查询时,遇到下面的报错信息: 二.原因分析: dw_user 表数据量比较大,直接查询速度慢,容易"卡死",导致数据库自动连接超时.... 三.解决 ...

  6. Lost connection to MySQL server during query，MySQL设置session,global变量及网络IO与索引

    Navicat导出百万级数据时,报错:2013 - Lost connection to MySQL server during query 网上一番搜索,修改mysql如下几处配置文件即可: sel ...

  7. 解决Lost connection to MySQL server during query错误方法

    昨天使用Navicat for MySQL导入MySQL数据库的时候,出现了一个严重的错误,Lost connection to MySQL server during query,字面意思就是在查询 ...

  8. mysqldump导出报错"mysqldump: Error 2013: Lost connection to MySQL server during query when dumping table `file_storage` at row: 29"

    今天mysql备份的crontab自动运行的时候,出现了报警,报警内容如下 mysqldump: Error 2013: Lost connection to MySQL server during ...

  9. [奇葩问题] ERROR 2013 (HY000): Lost connection to MySQL server during query

    查询一条耗时30s以上语句,实际为2分钟多. mysql> select version(); +------------+ | version() | +------------+ | 5.6 ...

随机推荐

  1. Go之简单并发

    func Calculate(id int) { fmt.Println(id) } 使用go来实现并发 func main() { for i := 0; i < 100; i++ { go ...

  2. PHP开发中，让var_dump调试函数输出更美观 ^_^#

    前提:php必须安装Xdebug模块. 用var_dump打印输出时,输出的内容没有被格式化.如下图: 通常使用var_dump打印的内容是被格式化后输出的,如下图: 造成没有格式化输出的原因是因为p ...

  3. Docker 仓库管理

    仓库 ( registry ) 是一个用来存放镜像的地方,当我们执行 docker pull centos 去拉取 centos 镜像时,默认是从 Docker Hub 这个公共仓库来拉取的: 对于企 ...

  4. drawCall_01

    在屏幕上渲染物体,引擎需要发出一个绘制调用来访问图形API(iOS系统中为OpenGL ES).每个绘制调用需要进行大量的工作来访问图形API,从而导致了CPU方面显著的性能开销.   Unity在运 ...

  5. RabbitMQ之总结

    P:生成者,消息产生者: C:消息消费者: 红:消息队列: java实现 步骤: 创建连接 从连接中创建通道(相当于JDBC中的Statement) 通过channel声明(创建)队列.(如果队列存在 ...

  6. rgba和opacity区别

    首先来看rgba: R:红色值.正整数 | 百分数G:绿色值.正整数 | 百分数B:蓝色值.正整数 | 百分数A:Alpha透明度.取值0~1之间. 再看opacity: 后面的取值为从 0.0 (完 ...

  7. 《Lua程序设计》9.3 以协同程序实现迭代器 学习笔记

    例:编写一个迭代器,使其可以遍历某个数组的所有排列组合形式.代码如下: function permgen(a, n) n = n or #a -- 默认n为a的大小 then -- 还需要改变吗? p ...

  8. YII2 model 字段验证提示 Unknown scenario: update

    意思是 update 场景不存在,也就是 定义的 rules 中没有该规则: /** * @inheritdoc * 验证规则 */ public function rules() { return ...

  9. 树莓派3安装opencv2程序无法运行

    在raspberry pi3 上安装opencv3已测试,没有问题,而opencv2报错如下: Xlib: extension "RANDR" missing on display ...

  10. 【变态问题】在发现“XXXX”类型前实体框架已使用默认 DbConfiguration 实例。

    今天在调试MVC反射调用EF写的dll 一直报错如下: 在发现“VipHallDbConfiguration”类型前实体框架已使用默认 DbConfiguration 实例.“VipHallDbCon ...