performance profiling tools

Tags: simple range description File value Temp ONS Group Select1. Performance analysis of profiling MySQL5. Version 0.37 supports the profiling– official manual. This tool can be used to query how much time SQL executes, how much timeSystem lock and table lock spend, and so on, whichis important for locating i/o consumption and CPU consumption of a statement.Vie

MySQL profiling Performance Analysis Tool Brief description: MySQL Query Profiler is a very convenient Query diagnostic and analysis tool that can be used to obtain the consumption of multiple resources in a Query throughout the execution process, such as CPU, IO, IPC, SWAP, page faults, context switche, and so on. The location of the functions called by MySQL in the source file during Query execution can a

Find the development and debugging tools. this post is based on the runtime profiling tool. lasthope is last edited on 2015-03-2412: 43: 03. a lot of include, require, nbsp; nbsp; is there a debugging tool like this? This post was last edited by lasthope on 12:43:03A web page is often nested with many include, require. Is there a debugging tool like this? when I run a PHP page, it sends all the executed

why resources become inefficient: 1, excessive use of resources, insufficient balance; 2, the resources are not properly matched; 3, resource damage or failure 3.5 Other Profiling Tools User_statistics: Some tables measure and audit database activity Strace: Investigate system invocation situations, use real time, unpredictable, overhead,oprofile use CPU cycles Summary: The most effective way to defi

####################Python脚本性能剖析###################Cprofile/profile/hotshot is used to count statistics on the frequency and time of execution of each part of a Python script, pstats can be used to format this informationCProfile, which is a C extension, has a small overhead and is suitable for profiling a long-running Python program, recommended for use with this moduleProfile, a pure Python module, has significant overhead, but it's relatively easy

Before there is a failure problem, look at the database slow query log, from the log and stored procedure itself directly analysis, can not know the problem point, and then through profiling to analyze, recorded as follows:0, check the slow query log, found that there is a large number of execution waits 650) this.width=650; "Src=" Http://s4.51cto.com/wyfs02/M00/7F/F4/wKioL1cy1Jzzfw_ 4aaa3zxuwyso212.png "title=" 02.png "alt=" Wkiol1cy1jzzfw_4aaa3zxuwy

I. Overview1, Version supportShow profiles is added after 5.0.37, to use this feature, make sure the version is after 5.0.37.To view the database version:Select version ();2. View turn on off and default settings observation count like ' profiling% ';OrSELECT @ @profiling;　　3. Open and Close parameters (parameters are session-level parameters, only valid for current session)To open the operation:Set

Find development debugging, run-time Profiling Tools

MySQL profiling performance analysis tool, mysqlprofiling Brief description: MySQL Query Profiler is a very convenient Query diagnostic and analysis tool that can be used to obtain the consumption of multiple resources in a Query throughout the execution process, such as CPU, IO, IPC, SWAP, page faults, context switche, and so on. The location of the functions called by MySQL in the source file during Query

####################Python脚本性能剖析###################Cprofile/profile/hotshot is used to count statistics such as how often each part of a Python script runs and how long it takes. Pstats can be used to format this informationCProfile is a C extension. Low overhead, suitable for parsing long-executed Python programs, recommended for use with this moduleProfile Pure Python module, there is significant overhead, but want to extend the relatively easyHotshot, experimental C module. Primary focus on o

MySQL performance profiling tool (pt-query-digest) This tool is also from percona-toolkitOther tools in this tool setTroubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart)Verify MySQL master-slave consistency (pt-table-checksum pt-table-sync)It can analyze various logs to analyze performance issuesIncl

Author Joachim Haagen skeie translator Li Yong posted on November 9, 2011 Domain Language Development theme tools, performance and scalability, Java Tag Performance tuning, open source Java sharing | More than once, we all had the idea of trying to find out what was going on in the bottom of a running program. This need may be due to slow service, Java Virtual

Label:MySQL comes with profiling performance analysis tool1. Show variables like '%profiling% ';(View profiling information) www.2cto.com2. Set profiling=1; (Turn on profiling)3. Execute SQL query Example: Select Goods_name from E

employees of each department in turn, then the access is more efficient, because there is no need to access the database every time to fetch the department.Second: Performance analysis of data manipulationWhen we will be proficient in using the above query method of the database content to do a variety of queries, you should understand the mechanism of these database operations, timely adjustment of various data operation statements, with a high effi

Introduction: Tuning is not always speed, sometimes need to adjust other aspects of the application, if the application needs tuning, the first thing to do is to use the profiler to monitor the application. However, profiling is not always feasible, and sometimes the reason may be ridiculous. In this installment of performance, Jack and Kirk talk about one of their recent experiences: they were instructed t

Mysql built-in profiling performance analysis tool 1. show variables like '% profiling %'; (view profiling information) www.2cto.com2. set profiling = 1; (enable profiling)3. Run the SQL query example: select goods_name from ecs_g

1. Show variables like '%profiling% ';(View profiling information)2. Set profiling=1; (Turn on profiling)3. Execute SQL query Example: Select Goods_name from Ecs_goods where goods_id 4. Show profile for query 4;The format of show profile is as follows:SHOW profile [Type [, type] ...] [for QUERY N] [LIMIT row_count [off

MySQL Performance Profiling Tool (pt-query-digest) is also from percona-toolkit Other tools in this tool set Troubleshooting of abnormal shutdown of MySQL Slave (pt-slave-restart) Including 1. slow log (default) 2. tcpdump 3. general log 4. binlog 5. show processlist The experiment simulates a certain amount of pressure through tpcc, and enables binlog, gene

the listThere are at least three ways to traverse after JDK1.5: ForEach, iterator, for loop.Package Bupt.xiaoye.charpter2.list;import Java.util.arraylist;import Java.util.iterator;import java.util.List; public class Testfor {public static void Testforeach (List list) {Object Temp;for (object t:list) temp = t;} public static void Testfor (List list) {Object temp;for (int i = 0; i The result of the operation is:As you can see, the direct for loop is the most efficient, followed by iterators and f

, "IsEOF": 1, "Invalidates": 0, "Direction": "Forward", "Docsexamined": 866283 }, "TS": Isodate ("2016-06-04t03:57:10.206z"), "Client": "127.0.0.1", "AllUsers": [ ], "User": ""}Use the following command to view the latest recordsDb.system.profile.find (). Sort ({$natural:-1})There is also a more concise way to viewShow profileThis command can view the last 5 recordsThe information content provided by profile is explainedTS: When the command i