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A great performance and diagnostics tool for the MySQL database server. Jet Profiler is real-time query performance and diagnostics tool for the MySQL database server.Query, table and user performance - Jet Profiler focuses on queries, tables and users. This gives you the information you need most in order to quickly fix performance problems in your code, such as most frequent queries, most used tables or busiest users.Graphical visualisation - Data is collected, analyzed and displayed in real-time in diagrams, pie charts and tables. You can easily drill down and navigate through the data.Low overhead - Most of the profiling work is done in the Jet Profiler application, not in the database server. Therefore, the performance hit is normally negligible, around 1%.Easy to use - It supports all MySQL versions. No database server changes are necessary. No agents or separate services are needed. Jet Profiler is a desktop application which runs on your computer. You start it, connect to a server, hit the record button, and see results within minutes. Jet Profiler is available for Mac and Windows, but also for Linux. Here are some key features of "Jet Profiler": · Top Queries - See which queries are being run the most on your server. · Top Users - See which users are using your server the most. · Top Tables - See which database tables are opened the most. · Top States - See which states your database is most busy doing, such as creating temp tables. · Replication Profiling - You can measure how much capacity you have left on the replication SQL thread on slaves. If you are using MyISAM a lot, a lock analysis will help discover any locks associated with replication. · Master and Slave statistics - See how many threads are working on your masters and slaves. Find I/O or SQL bottlenecks. · MyISAM Lock Analysis - You can view which queries cause the most amount of MyISAM locking. This can be used to minimize replication lag and lock contention on busy tables. · Query Ratings - You can get your queries rated and see which queries are most likely to cause load due to missing indices, big tables and more. · Query Visualization - The query execution plan can be visualized using EXPLAIN. A diagram shows the table lookups involved, the rating and join size. · Slow Queries - See the slowest queries per time interval. · Zoomable GUI - You can easily zoom in on spikes in your load and see the corresponding queries for that time interval. · General Server Metrics - Such as threads connected, network I/O, command statistics, handler statistics and more. 50+ metrics are recorded from the server. · Save / Load Support - Save profiling data for later use, compare week to week or normal load vs high load situations. · Low Overhead - Running the tool against your database typically costs around 1%. Recording granularity customizable. · Supports all MySQL Versions - Works on 3.x (!), 4.0, 4.1, 5.0, 5.1 and 6.0, Enterprise and Community editions. · Works on Windows, Linux and Mac. · No Server Changes. · Simple Setup. · Free / Professional Version - The free version doesn't cost anything and isn't time limited. Upgrade to the professional version to get all features. Limitations: · Nag screen. · Saving is disabled. What's New in This Release: · Fixed bug #12 - Crashes when pointed at a slave - org.h2.jdbc.JdbcSQLException: Value too long for column NAME: 'Has read all relay log; waiting for the slave I/O thread to update it' again.

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