(46.56%)All time:516.842801 S, 1.464144 s AVG, 1.001595 s to 2.815608 s MaxLock time (s): 40.935 Mobile Ms Total, s AVG, S-211 max (44.74%)All lock:38.016 Ms Total, 108 s AVG, 135? s MaxRows sent:1 AVG, 1 to 1 max (40.57%)Rows examined:387.71k avg, 225.34k to 725.90k Max (33.79%)Database:yyUsers:yyr@ 10.4.1.83:33.87% (126) of query, 34.79% (278) All usersyyr@ 10.4.1.81:33.33% (124) of query, 32.79% (262) A
Slow query of MySQL-delete slow query logs
I. environment
OS: CentOS release 5.8 (64-bit)
DB: MySQL5.5.17
II. operations
Run the rm-f command to delete the slow query log.
III.
As we all know, in the case of large traffic, can add node or change the schema can effectively alleviate the database pressure, but all the origin, all from a single MySQL start. The following summarizes some of the experiences that have been used or studied, and some optimizations are made to MySQL, starting with the configuration and adjusting the index.The first step should be to troubleshoot the problem and find the bottleneck, so start with the logturn on
format is: SQLCMD -u user name-p password-S IP address If the port number is omitted, the default connection is 1433 port It has a slightly different connection method and Query Analyzer, assuming that the password for the SQL2005 server SA on 192.168.1.55 is SA, The port is 1434 We can connect like this sqlcmd-u sa-p sa-s 192.168.1.55,1434 If you connect port 1433, you can omit the port: sqlcmd-u sa
First, the environmentOs:centos Release 5.8 (64-bit)db:mysql5.5.17Second, the operation Delete the slow query log directly from the command rm-fThird, problems ariseSlow query log is not automatically generated, (if there is a backup, copy back again is not good to make)Iv.
Tags: style blog http io file SP problem logInitial: Due to the high CPU consumption of the newly installed server, the response is not timely troubleshooting, because the environment based on the most basic lamp architectureThink of turning on MYSQL slow_query_log slow query log for reasons analysis;But after seeing the log
server| Query Analysis
These days in the web development, often need to connect SQL Server, but SQL Server is the server on the Internet, the service provider gave a sqlconnectionstring, However, in the connection string found that the SQL Server does not use the default 1433 port, so I would like to Query Analyzer should not
Enable the slow query record function. Next, let's analyze the content of the slow query:
Select count (distinct. name) from cp_paycard as a left join cp_reservation as B on. uid = B. UID where. type = 2 and B. cpparkid = '000000' and B. businesstype in (2013) and validenddate> '2017-07-05 23:59:59 ';# User @ host: Ro
Label:1. php Slow Script Log
Intermittent 502, is caused by the backend php-fpm is not available, the intermittent 5,021-like is due to the PHP-FPM process restart.
An intermittent 502 error occurs when the number of PHP-FPM in a configuration exceeds the number of child processes, and if max_requests is set in the configuration, there will be a 502 error over the number, and max_requests setti
The query is the most problematic database response. Most databases now provide the means to help with performance analysis. Oracle, for example, will help you find the slow statements directly and provide an optimization solution. In MySQL, you have to open slow logging to analyze (records can be saved in a table or file, the default is saved in the file, our sy
Tags: add scan appears stat sorted MySQL optimization SLA featured OTAThe log is the same as people write diaries, record the past things. But the diary of a person is subjective (remember what you want to remember), and the database log is objective, according to the record content is divided into the following several kinds of log (technical article): A, error
Logs in MySQL include: error log, binary log, General query log, slow query log, and so on. Here is the main introduction of the more commonly used two features: General
MySQL Slow queryIn web development, we often write some SQL statements, a bad SQL statement may make your entire program very slow, more than 10 seconds the average user will choose to close the Web page, how to optimize the SQL statement to run those long-running SQL statements to find out? MySQL provides us with a very good feature, that is slow
When MySQL uses the slow query log to locate those SQL statements that perform less efficiently, and start with the--log-slow-queries[=file_name] option, Mysqld writes a full execution time of more than Long_ Query_time The log fi
5.2 MySQL server log---------------------mysql log types: 1. Error log: Problems encountered when starting, running, stopping mysqld 2, common query log: establishing client connections and receiving from clients Received statements 3, binary
Label:As we all know, in the case of large traffic, can add node or change the schema can effectively alleviate the database pressure, but all the origin, all from a single MySQL start. The following summarizes some of the experiences that have been used or studied, and some optimizations are made to MySQL, starting with the configuration and adjusting the index.The first step should be to troubleshoot the problem and find the bottleneck, so start with the logTurn on
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