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Search Results for: disk partition

A closer look at the MySQL ibdata1 disk space issue and big tables

A recurring and very common customer issue seen here at the Percona Support team involves how to make the ibdata1 file “shrink” within MySQL. I can only imagine there’s a degree of regret by some of …


Understanding the Performance Characteristics of Partitioned Collections

In TokuMX 1.5 that is right around the corner, the big feature will be partitioned collections. This feature is similar to partitioned tables in Oracle, MySQL, SQL Server, and Postgres. A question many have is …


The Difference Between TokuMX Partitioning and Sharding

In my last post, I described a new feature in TokuMX 1.5—partitioned collections—that’s aimed at making it easier and faster to work with time series data. Feedback from that post made me realize that some …


What’s new in TokuMX 1.4, Part 2: Partitioned oplog

We just released version 1.4.0 of TokuMX, our high-performance distribution of MongoDB. There are a lot of improvements in this version (release notes), the most of any release yet. In this series of blog posts, …


Filling the tmp partition with persistent connections

The use of tmpfs/ramfs as /tmp partition is a common trick to improve the performance of on-disk temporary tables. Servers usually have less RAM than disk space so those kind of partitions are very limited …


Aligning IO on a hard disk RAID – the Benchmarks

In the first part of this article I have showed how I align IO, now I want to share results of the benchmark that I have been running to see how much benefit can we …


Aligning IO on a hard disk RAID – the Theory

Now that flash storage is becoming more popular, IO alignment question keeps popping up more often than it used to when all we had were rotating hard disk drives. I think the reason is very …


MySQL Partitioning: A Flow Chart

In Part 1, and Part 2 of this series, I presented some thoughts on partitioning. I heard some great feedback on why people use partitioning. Here, I present a flow chart that summarizes what I’ve …


Partitioning, Free Lunches, & Indexing, Part 2

Review In part one, I presented a very brief and particular view of partitioning. I covered what partitioning is, with hardly a mention of why one would use partitioning. In this post, I’ll talk about …


Partitioning, Free Lunches, and Indexing

Why partition? Partitioning is a commonly touted method for achieving performance in MySQL and other databases. (See here, here, here and many other examples.) I started wondering where the performance from partitions comes from, and …