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SysBench: System evaluation benchmark
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The idea is to quickly get an impression about system performance for MySQL
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usage without setting up complex benchmark and even without installing MySQL.
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In some cases this is very helpful. This is also the reason for having
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everything in simple file not depending on any external libraries.
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This benchmark was designed for identifying basic system parameters, as they
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are important for system using MySQL (w Innodb) under intensive load.
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Handling of IO in case of many parallel requests, checked as well as
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memory allocation/transfer speed and scheduler performance.
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CPU is benchmarked by using 64bit integer manipulation using Euklid
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algorithms for prime number computation.
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Benchmarks are designed to show benefit of multiple CPUs as well as of
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multiple hard drives, battery backed up write cache.
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Sequential read/writes test is a bit tricky, it means request are just given
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out sequentially, but there is no guaranty they will be actually executed this
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way, it could result in some sort of random IO in case of bad IO or threads
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See the file INSTALL for generic installation instructions.
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In most cases you will need the following steps:
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./configure (or ./configure --without-mysql to compile w/o MySQL support)
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sysbench [<general-options>] [<test-options>] <command>
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To see available options, tests and commands type:
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sysbench --test=<name> help
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to see options supported by a specified test. Default values for the options
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are specified in brackets after description.
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Currently supported commands are help, run and create-db (for the MySQL test).
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The latter will create a table and fill it with values required to run the
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MySQL test, using database, table name and size passed as MySQL test options.
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* Make sure number of threads is at least 2 times of numbers CPUs you have.
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* For the fileio test make sure you're using file size which is at least 5
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times larger than your memory for reliable results. Make sure to use enough
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files to keep size of each less than 2/4G.
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* For the threads test --thread-locks should be at least 2 times less than
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* If you're running on 64bit CPU make sure to compile 64bit binary for good
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This test is designed to be easily extensible to add your own test operations,
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as well as create operation mixes to benchmark some particular load.
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The architecture is very simple. Several threads are started and they all
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run in the loop asking for requests from get_request() function, until
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NULL operation is received. For each request execute_request() is executed,
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which runs it as designed. This allows to design test highly scalable as well
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as producing large amount of conflicts if needed for test case.
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Please report any bugs you encounter to <alexeyk@mysql.com>.
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