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I have a Windows based dedicated server have below configuration:

Windows edition: Windows Server 2008 R2 Standard Service Pack 1
Processor: Intel(R) Xeon(R) CPU X5460 @3.16GHZ 3.16 GHZ (2 Processors)
Installed Memory(RAM): 8.00 GB
System type: 64-Bit Operating system

Even, I am facing bad performance of my application. DB connections become high >100 and system starts running slower. It become dead when DB connection reached to around 200. While we defined MAX connection=800. I already tried multiple things like - MySQL configuration variables tuning Identified and improved the bad performing queries

Above steps helped a little bit but still facing very bad performance. It is just like I am swimming in the ocean without any expertise and life saving boat.

Now, I am planning to upgrade MySQL from 5.1 to 5.6 as well as switching from Windows to Linux. I guess as Open source - Linux must have multiple tools to measure performance and tuning tools for Windows. But, before this I want to be sure about below things:

  • How much will it be useful in performance improvement?
  • My application is running in dedicated Windows server. Switching application servers also required?
  • Need to tune MySQL configuration variables again?
  • What should be the configuration (hardware and software) of LINUX based system?
  • What performance measurement and tuning tools are available for LINUX?

Many Thanks :)

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Don't expect Linux to solve all your problems. Before suggesting a solution find your problem first. I would start with collecting all queries in a slow log with long_query_time=0 and review it with pt-query-digest. MySQL dies when number of connections high - by any chance, are the tables MyISAM? It might be table level locks problem – akuzminsky Mar 11 '14 at 21:55

You can try Percona wizard tool to configure MySQL server parameter based on Hardware and application in use using also there are other online tools available at all percona tools are free.

Some similar answsers to the questions can be found here:

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thanks Glenn. Links provided by you are helpful. +1 for the provided links. – ursitesion Mar 10 '14 at 0:45

Take a look into this Neor Profile SQL; this free tool can help you monitor and identify your bottleneck points. It did a lot of good things for me!

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