Category Archives: Performance
When dealing with high performance, low latency storage devices, such as SSD cards, one finds bottlenecks in new places. This is a story about such a bottle neck and how to work around it. (more…) …
Oracle has now launched MySQL-5.6.10-GA, so it is time to come up with some new benchmark results. The test candidates in this benchmark run are
- MySQL-5.5.29
- MySQL-5.6.10
- MariaDB-5.5.28a
- MariaDB-10.0.1
The 5.5 versions are in because I wanted to check for any regressions. In the past we have often seen performance regressions in newer versions which were caused by new features.
This time the benchmark was run on a different box. The main difference is that this box does not have SSD but a high performance RAID-5 with 512M of battery-backed cache. …
Continue reading “Sysbench OLTP: MySQL-5.6 vs. MariaDB-10.0”
We haven’t posted any Windows benchmarks for a while, and MariaDB for Windows contains some specific improvements which might not be widely know since we haven’t talked much about them yet. This post is an attempt to fix that. We’ll also share current MySQL 5.5 numbers.
My setup is an 8 core 2 socket server (yes, a little bit dated for today, but it is the best machine I have at my disposal), 10K SAS disks with RAID1. I ran sysbench 0.4 single table / 1,000,000 records. I ran the benchmark over a network, with the number of concurrent clients ranging from 4 to 4096. …
This article describes how I tuned MariaDB to give the best write throughput with SSD based storage.
When you have a write-heavy application writing into InnoDB, you will probably experience the InnoDB Checkpoint Blues. The effect manifests as stalls – short periods of time where the troughput falls to zero and I/O activity goes crazy. The phenomenon is well known and described i.e. here. More background about checkpointing can be found here.
The XtraDB fork of the InnoDB engine (and heart of Percona Server) contains some patches with the goal to overcome this odd behavior. …
A few days ago MariaDB, MySQL and Percona all three released new versions of the 5.5 server. So I decided it’s time to run sysbench once more and compare the OLTP performance. The test candidates are:
- MariaDB-5.5.24, using either XtraDB (default) or InnoDB
- MySQL-5.5.25
- Percona Server 5.5.24-26.0
For the benchmarks I used our trusty old pitbull machine which has 24 cpu cores, 24G of RAM and a nice RAID-0 composed of 3 SAS SSD.
The benchmark was sysbench-0.5 multi-table OLTP, using 8 tables with total 10G of data. InnoDB buffer pool was 16G, InnoDB log group capacity 4G (the maximum for MySQL). …
When I published the MariaDB-5.3.4 sysbench results I said “if your workload includes complex (sub)queries, then you will probably benefit more from MariaDBs new optimizer features”. Today I will present some benchmark results for complex workload.
The benchmark is DBT3, an implementation of the TPC-H specification. DBT3 is written in C and hosted at Sourceforge.
The DBT3 benchmark can run at different scale factors – defining the size of the database. I used a scale factor of 30 which yields ~30GB of raw data and ~48GB of disk footprint. The machine running the benchmark had 16G of memory. …
MariaDB-5.5.21-beta is the first MariaDB release featuring the new thread pool. Oracle offers a commercial thread pool plugin for MySQL Enterprise, but now MariaDB brings a thread pool implementation to the community!
If you are not familiar with the term, please read the Knowledge Base article about it.
The main design goal of the thread pool is to increase the scalability of the MariaDB server with many concurrent connections. In order to test and demonstrate this, I have run the sysbench OLTP RO benchmark with up to 4096 threads to compare the new pool-of-threads and the traditional thread-per-connection scheduler:
Benchmark description:
- sysbench multi table OLTP, readonly
- 16 tables, totaling 40 mio rows (~10G of data)
- 16G buffer pool – result is independent of disk performance
- mysqld bound to 16 cpu cores, sysbench to the other 8
Read/write OLTP benchmark results will be published as soon as they are available. …
Last weekend Vadim from Percona published his MariaDB 5.3.4 benchmark results. As the new benchmark guy at Monty Program I take this oportunity to add some more results of my own.
One question in the comments to Vadim was if it is fair to compare MariaDB-5.3 with MySQL-5.5. Or if this comparison should be done with MySQL-5.1. The answer is: it does not matter much. MySQL-5.5 and MySQL-5.1 show very similar results in the Sysbench OLTP benchmark.
So I created a Sysbench environment pretty much like Vadims and tested the following versions of the MySQL Server:
- MariaDB-5.3.4 – the Monty Program release candidate, both with XtraDB and the InnoDB plugin
- Percona-Server 5.1.61 because it is based on the same XtraDB version as MariaDB-5.3
- Percona-Server 5.5.20 – the current Percona flagship
- MySQL-5.5.20 – the current Oracle flagship
The result:
Indeed MariaDB-5.3.4 scales significantly worse than MySQL-5.5.20. …