SQL2000, do not use the following words: "Is null", "
23. Use query analyzer to check the SQL statement query plan and evaluate and analyze whether the SQL statement is optimized. Generally, 20%CodeIt occupies 80% of the resources, and our optimization focuses on these slow points.
24. If the in or
MySQL slow query analysis bitsCN.com
MySQL slow query analysis is essential for optimizing database slow query statements when we perform systematic optimization, especially for e-commerce-type severe MYSQL applications. Let's tak
How does MySQL clear slow Query files,
I. Overview
This chapter mainly describes how to generate a new slow Query file online when the slow Query file is large.
Test environment: mysql 5.6.21
Step 2
Configure
1. the definition of slow query refers to all SQL statements that have been executed beyond the time threshold set by long_query_time. Slow query logs are the logs that record these SQL statements. 2 enable slow query
MySQL slow log?MySQL's slow query log is a log record provided by MySQL, which is used to record a statement in MySQL that has a response time exceeding the threshold, which refers to SQL that runs longer than the Long_query_time
Label: MySQL turn on slow query log MySQL accelerated query speed of a unique weapon: query cache on the MySQL query cache from five angles for detailed analysis: How to query cache, ho
Monitor SQL statement execution efficiency based on mysql slow log
Monitor SQL statement execution efficiency based on mysql slow logs
Enable MySQL log-slow-queries (slow query record
MySQL slow query analysis is essential for optimizing database slow query statements when we perform systematic optimization, especially for e-commerce-type severe MYSQL applications. Let's take a look at how to analyze MYSQL slow queries. 1. Enable MYSQL
. Modify the PHP configuration file: Vim/etc/php.ini 7. Modify the Web page: Cd/var/www/html/anemometer/confCP sample.config.inc.php config.inc.phpVI config.inc.php And 8. Modify the Apache configuration file " cat/etc/httpd/conf/httpd.conf |grep "ServerName" |grep-v ' ^# 'ServerName 10.1.11.99:80 Restart HTTP, can not access, error is as follows: Tail-f/etc/httpd/logs/error_log Here's how to fix it: 9: Visit page: 10.1.11.99/anemometer 11. Import
configuration files will then be created under the directory, for example, we want to build www.com and aming.comThen delete the configuration files that were just copied into the corresponding two configuration files.This configuration is similar to the vhost in Nginx simple and convenient.PHP-FPM Slow Execution Log如果有一天我们的网站访问非常慢,这时我们既可以通过php-fpm的慢执行日志进行分析,在这里我们可以非常清晰的了解到php的脚本中哪里执行时间长,他可以定位到具体的行,这就是php-
Label:Original: MySQL Empty slow Query fileTags: Configure slow query OverviewThis chapter mainly writes about how to generate a new slow query file online when the slow
Tags: business log slow log level disk IO mysq variable blocking todayA brief introduction: Today let's talk about some problems in the slow query logTwo phenomena: Slow log appear some
This chapter describes how to generate a new slow query file online when the slow query file is large. Test Environment: mysql5.6.21 step 1 configure slow query default my. cnf file in the etc directory vimetcmy. cnf # slow_querys
The slow log in mysql is a log tool used to record SQL statements that have been executed for a long time (beyond long_query_time seconds.
Enable slow log
Set in my. cnf
[mysqld]
slow_query_log=on
slow_query_log_file=mysql-slow
Using MySQL Slow Log to solve the problem of high CPU usage in MySQL sometimes finds that MySQL occupies a high CPU usage in Linux VPS, resulting in a high system load. This is probably because the execution time of an SQL statement is too long. Optimizing this SQL statement or optimizing the index of a table referenced by this SQL statement can solve the problem. But how can we find out which SQL statement
Tags: anemometer slow query toolDescription: Anemometer is a graphical display of MySQL slow log tool. Combining Pt-query-digest,anemometer can easily help you analyze slow query logs,
Label:In MySQL, the slow query log is often used as the basis for us to optimize the database, if there is a similar function in MongoDB? The answer is yes, that's MONGO database Profiler. Not only, but also some slow Query than MySQL Lo
Tags: convert set rman slow query merge from path sequence modificationTurn on slow query logAdd two configuration parameters under the [mysqld] line in the configuration file my.cnf or My.ini Slow_query_log = on #开启慢查询
long_query_time=1 #设置慢查询时间 1 s
slow_query_log_file="d:/phpstudy/mysql/data/slow_query.l
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