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MySQL 5.5.8 and Percona Server: being adaptive

 | December 20, 2010 |  Posted In: Benchmarks, MySQL

As we can see, MySQL 5.5.8 comes with great improvements and scalability fixes. Adding up all the new features, you have a great release. However, there is one area I want to touch on in this post. At Percona, we consider it important not only to have the best peak performance, but also stable and predictable performance. I refer you […]

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Write performance on Virident tachIOn card

 | December 13, 2010 |  Posted In: Benchmarks, Hardware and Storage

This is crosspost from https://www.percona.com/blog/. Disclaimer: The benchmarks were done as part of our consulting practice, but this post is totally independent and fully reflects our opinion. One of the biggest problems with solid state drives is that write performance may drop significantly with decreasing free space. I wrote about this before (https://www.percona.com/blog/2010/07/17/ssd-free-space-and-write-performance/), using a […]

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SSD: Free space and write performance

 | July 17, 2010 |  Posted In: Benchmarks

( cross posting from SSD Performance Blog ) In previous post On Benchmarks on SSD, commenter touched another interesting point. Available free space affects write performance on SSD card significantly. The reason is still garbage collector, which operates more efficiently the more free space you have. Again, to read mode on garbage collector and write […]

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On Benchmarks on SSD

 | July 14, 2010 |  Posted In: Benchmarks, Hardware and Storage

(cross post from SSD Performance Blog ) To get meaningful performance results on SSD storage is not easy task, let’s see why. There is graph from sysbench fileio random write benchmark with 4 threads. The results were taken on PCI-E SSD card ( I do not want to name vendor here, as the problem is […]

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SLC vs MLC

 | July 14, 2010 | 

(cross posting from SSDPeformanceBlog.com ) All modern solid state drives use NAND memory based on SLC (single level cell) or MLC (multi level cell) technologies. Not going into physical details – SLC basically stores 1 bit of information, while MLC can do more. Most popular option for MLC is 2 bit, and there is movement […]

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PBXT in tpcc-like benchmark

 | June 2, 2010 |  Posted In: Benchmarks, MySQL

Finally I was able to run PBXT 1.0.11 pre-GA in tpcc-like workload, apparently there was bug with did not allow me to get the result earlier, and I am happy to see that PBXT team managed it. For initial runs I took tpcc 100 warehouses ( about 10GB of data) which fully fits into memory […]

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FlashCache: more benchmarks

 | May 18, 2010 |  Posted In: Benchmarks, Hardware and Storage, MySQL

Previously I covered simple case with FlashCache, when data fits into cache partitions, now I am trying to test when data is bigger than cache. But before test setup let me address some concern (which I also had). Intel X25-M has a write cache which is not battery backuped, so there is suspect you may […]

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FlashCache: first experiments

 | May 10, 2010 |  Posted In: Benchmarks, Hardware and Storage, MySQL

I wrote about FlashCache there, and since that I run couple benchmarks, to see what performance benefits we can expect. For initial tries I took sysbench oltp tests ( read-only and read-write) and case when data fully fits into L2 cache. I made binaries for FlashCache for CentOS 5.4, kernel 2.6.18-164.15, you can download it […]

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