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mysql慢查询日志&&分析
开启 mysql 慢查询[命令开启] long_query_time 定义慢查询时间 mysql> show variables like 'long_query_time'; + + + | Variable_name | Value | + + + | long_query_time | 10. ...
分类:数据库   时间:2020-09-18 00:00:12    阅读次数:41
实时电商数仓(十二)之实时数据存储与查询(二)ElasticSearch(二)安装(centos)
1 安装包下载 Elasticsearch官网: https://www.elastic.co/products/elasticsearch https://www.elastic.co/cn/downloads/past-releases/elasticsearch-6-6-0 本课程选择的版本是 ...
分类:其他好文   时间:2020-09-17 23:57:25    阅读次数:49
463. Island Perimeter
package LeetCode_463 /** * 463. Island Perimeter * https://leetcode.com/problems/island-perimeter/description/ * * You are given row x col grid repres ...
分类:其他好文   时间:2020-09-17 23:30:18    阅读次数:36
Packet for query is too large (7565929 > 4194304).
1、错误描述 错误关键字: Packetfor query is too large (***> 4194304). You can change this value on theserver by setting the max_allowed_packet' variable 从错误中, 我们 ...
分类:其他好文   时间:2020-09-17 23:09:10    阅读次数:28
如何下载B站视频——使用you-get下载
一. 下载视频方法 1. 电脑安装python 安装方法:https://www.cnblogs.com/leslie12956/p/12227491.html 2. 使用pip安装you-get包,pip install you-get,如果安装过慢,可以使用第二个语句 pip install y ...
分类:其他好文   时间:2020-09-17 22:50:57    阅读次数:28
PHP 数组
数组能够在单独的变量名中存储一个或多个值。 实例 数组在单个变量中存储多个值: <?php $cars=array("porsche","BMW","Volvo"); echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ...
分类:编程语言   时间:2020-09-17 22:50:39    阅读次数:27
leetcode 299. Bulls and Cows
You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each time ...
分类:其他好文   时间:2020-09-17 22:49:35    阅读次数:38
【leetcode】1509. Minimum Difference Between Largest and Smallest Value in Three Moves
题目如下: Given an array nums, you are allowed to choose one element of nums and change it by any value in one move. Return the minimum difference between ...
分类:其他好文   时间:2020-09-17 22:48:12    阅读次数:35
On N-way ANOVA in Python
When searching google with the keywords 'n-way anova python', you almost get nothing but one-way/two-way ANOVA from scipy. I developed a C++ version y ...
分类:编程语言   时间:2020-09-17 21:33:43    阅读次数:31
js 中Object.keys()
Object.keys(obj) 参数 obj:要返回其枚举自身属性的对象 返回值:一个表示给定对象的所有可枚举属性的字符串数组 eg- // simple array var arr = ['a', 'b', 'c']; console.log(Object.keys(arr)); // cons ...
分类:Web程序   时间:2020-09-17 20:36:04    阅读次数:33
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