…. This is regressions as a result of cleaning up the IO path in the XFS code – it’s put a lot… Throughput scales with thread count – each thread runs at 100% CPU utilsation, and XFS gets up to 3x as much throughput… a single file when completely CPU bound… So, basically, XFS is still the filesystem you want for direct IO – but like any filesystem…
Post: XtraDB in CPU-bound benchmark
December 18, 2008 By Leave a Comment
… run for CPU Bound,or it would be more correctly to say in-cache benchmark, because there is a lot of CPU remains idle. This run is exactly the same as Disk Bound but with innodb_buffer_pool… utilize CPU more fully XtraDB will show more gains, though not 1.5x as for IO bound workload. One may ask why CPU is…
Post: Scaling IO Bound Workloads Webinar
June 19, 2009 By 2 Comments
… Solutions for IO Bound Workloads in MySQL. My part of the presentation will be speaking about why switching from CPU bound workload to IO bound is…
Post: Are you designing IO bound or CPU bound application ?
December 20, 2006 By 10 Comments
… second MySQL Consulting work or even more frequently. IO Bound workload is quite different from CPU bound one, which happens when your working set… application back to speed. The cases when going from CPU bound to IO bound hits the most is there a lot of rows are… design in CPU bound case – yes you will but it will happen with 100.000 messages not 100 messages as in IO bound case…
Post: Impact of logging on MySQL’s performance
February 10, 2009 By 7 Comments
… different InnoDB buffer was used. In CPU-bound case innodb_buffer_pool_size=2G In IO-bound case innodb_buffer_pool_size=512M innodb…=O_DIRECT DBT2 settings For CPU-bound case number of warehouses was 10(1.31GiB). In case of IO-bound load – 100 warehouses… about performance impact in case of CPU-bound workload. The performance impact is negligibly small in IO-bound workload even if all queries are…
Post: Modeling MySQL Capacity by Measuring Resource Consumptions
March 8, 2011 By 1 Comment
… estimate capacity of MySQL system ? We can look at CPU and IO consumption per Query and compare it to estimated (or benchmarked… examines 20 rows, which means about 1 IO per 40 rows… which amounts to pretty IO bound load for me. But average is… less than 1 row in average which makes it very IO bound. So what If I am planning for load growth and…
Post: XtraDB/InnoDB CPU bound benchmarks on 24cores server
December 29, 2008 By 6 Comments
… ran few CPU-bound tasks there. The goal of benchmarks was investigation of InnoDB-plugin and XtraDB scalability in CPU-bound load. CPU specification: processor…=0 innodb_thread_concurrency=0 innodb_io_capacity=1000 innodb_write_io_threads = 16 innodb_read_io_threads = 16 join_buffer_size=1M…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
…_sync_spin_loops can be used to ballance between wasting CPU time running spin locks and doing unneeded context switches. The… values for any of these variables is indication of IO bound workload. Note however – IO requests submited by threads executing requests are not… may have these at zeroes while workload being IO bound still. Next, number of file IO operations is shown as well as computed…
Post: XtraDB benchmarks - 1.5X gain in IO-bound load
December 18, 2008 By 30 Comments
…-disks utilization. Also results may be different if load is CPU bound. I compared MySQL 5.1.30 trees – MySQL 5.1…_size = 2G and innodb_flush_method=O_DIRECT to emulate IO bound load. InnoDB parameters: innodb_additional_mem_pool_size = 16M innodb… more than InnoDB-plugin-1.0.2 And there is CPU utilization for all tested engines: As you see XtraDB also…
Post: Aligning IO on a hard disk RAID – the Benchmarks
June 9, 2011 By 11 Comments
… = yes Speeds | 24×1600.000 Models | 24xIntel(R) Xeon(R) CPU X5650 @ 2.67GHz Caches | 24×12288 KB # Memory ##################################################### Total | 23… every fileio benchmark and an IO bound read-write oltp benchmark in autocommit mode. File IO benchmark For the FileIO benchmark,…
