Post: Using Flexviews - part two, change data capture
…MySQL 5.1 or aren’t using RBR, then it is possible to set up a dedicated MySQL slave which has log_slave_updates=1… views. Most database servers have some spare CPU for binary log parsing. Run the...
View ArticlePost: Scaling problems still exist in MySQL 5.5 and Percona Server 5.5
MySQL 5.5 and Percona Server 5.5 do not solve all scalability problems even for read only workloads. Workloads which … I have compared Percona Server 5.1.56-12.7 and Percona Server 5.5.11-20.2 with...
View ArticlePost: TPC-H Run on MySQL 5.1 and 6.0
… by MySQL 5.1 time so if it is less than 1 MySQL 6.0 is faster if more than 1 slower: Query MySQL 5.0.23 MySQL 6… data set MySQL 5.1 could only complete 10 out of 22 queries within 3hours run time...
View ArticlePost: MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark
…MySQL 5.6 vs MySQL 5.5 & the Star Schema Benchmark[/caption] So far most of the benchmarks posted about MySQL 5.6 use…MySQL 5.6.10 to be much slower than MySQL 5.5.30 even with only…1: Default...
View ArticlePost: The write cache: Swap insanity tome III
… the allocation of memory for the MySQL process using the numactl utility, drop the…2013 procs ———–memory———- —swap– —–io—- –system– —–cpu—– Fri Mar 22 10:03:22…7 80 5 0 Fri Mar 22 10:03:28 UTC 2013 1...
View ArticlePost: MySQL and Percona Server in LinkBench benchmark
…datadir ~10GB). We used this dataset …MySQL 5.6.11. Conclusion: In CPU-bounds case MySQL performs quite well, though we can see small performance drop in MySQL 5…MySQL 5.5 and 5.6...
View ArticlePost: Percona Server 5.5.30-30.2 rerelease fixes non-restart issue
… was incompatible with automake 1.12. Bug fixed #…CPU branch prediction. Bug fixed #1125248 (Alexey Kopytov). dialog.so used…MySQL 5.6 the fix for unnecessary log_flush_order_mutex acquisition. Bug...
View ArticlePost: More on MySQL transaction descriptors optimization
…and focused only on case #1. Which is the perfect case for read-only transaction optimization in MySQL 5.6,…/node communication). Results: First of all, we used a smaller dataset for this benchmarks...
View ArticlePost: Percona Server for MySQL 5.5.30-30.2 now available
… was incompatible with automake 1.12. Bug fixed #…CPU branch prediction. Bug fixed #1125248 (Alexey Kopytov). dialog.so used…MySQL 5.6 the fix for unnecessary log_flush_order_mutex acquisition. Bug...
View ArticlePost: MySQL and the SSB - Part 2 - MyISAM vs InnoDB low concurrency
…blog post I compared MySQL 5.5.30 to MySQL 5.6.10, both with default settings using only the InnoDB storage engine. …database is cold, but uses less CPU time when the database is hot. I am only...
View ArticlePost: MySQL 5.0, 5.1 and Innodb Plugin CPU Efficiency
… CPU efficiently in TPC-C like Workload. We did it couple of weeks ago so MySQL 5.0.67, MySQL 5.1.29 and Innodb Plugin 1.0.1 were used which are not very recent, though… of this patch we only use this...
View ArticlePost: Identifying the load with the help of pt-query-digest and Percona Server
… way. But vanilla MySQL does have its limitations, it reports only a subset of stats…Lock_time: 0.000000 Rows_sent: 1 Rows_examined: 655360 use test; SET timestamp=1325145746; select… pt-query-digest...
View ArticlePost: Percona Server for MySQL 5.5.30-30.2 now available
… was incompatible with automake 1.12. Bug fixed #…CPU branch prediction. Bug fixed #1125248 (Alexey Kopytov). dialog.so used…MySQL 5.6 the fix for unnecessary log_flush_order_mutex acquisition. Bug...
View ArticlePost: Shard-Query adds parallelism to queries
…using the FlightDate column using the improved MySQL 5.5 partitioning options which work directly on columns without the need to use…Shard-Query16 worker24 worker32 worker.1 year4.5481.0440.8540….past...
View ArticlePost: Modeling MySQL Capacity by Measuring Resource Consumptions
… So how we can use this data to estimate capacity of MySQL system ? We can look at CPU and IO consumption per …99 # Bytes sent 8.77G 11 55.41M 5.15k 3.88k 258.55k 1.46k # Merge passes 0 0 0 …means...
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InnoDB, InnoDB-plugin vs XtraDB on fast storage
To continue fun with FusionIO cards, I wanted to check how MySQL / InnoDB performs here. For benchmark I took MySQL 5.1.42 with built-in InnoDB, InnoDB-plugin 1.0.6, and XtraDB 1.0.6-9 ( InnoDB with...
View ArticleEstimating Replication Capacity
It is easy for MySQL replication to become bottleneck when Master server is not seriously loaded and the more cores and hard drives the get the larger the difference becomes, as long as replication...
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Infinite Replication Loop
Last week I helped 2 different customers with infinite replication loops. I decided to write a blog post about these infinite loop of binary log statements in MySQL Replication. To explain what they...
View ArticleSide load may massively impact your MySQL Performance
When we’re looking at benchmarks we typically run some stable workload and we run it in isolation – nothing else is happening on the system. This is not however how things happen in real world when we...
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kernel_mutex problem. Or double throughput with single variable
Problem with kernel_mutex in MySQL 5.1 and MySQL 5.5 is known: Bug report. In fact in MySQL 5.6 there are some fixes that suppose to provide a solution, but MySQL 5.6 yet has long way ahead before...
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