Planet MySQL Planet MySQL: Meta Deutsch Español Français Italiano 日本語 Русский Português 中文
10 Newer Entries Showing entries 91 to 100 of 245 10 Older Entries

Displaying posts with tag: Benchmarks (reset)

Testing Fusion-io ioDrive
+0 Vote Up -0Vote Down

Following my series of posts on testing different SSD, in my last post I mentioned that SATA SSD performance is getting closer to PCIe cards. It really makes sense to test it under MySQL workload, but before getting to that, let me review the same workload on Fusion-io ioDrive PCIe card. This is yet previous generation of Fusion-io cards, but this is the one that has biggest installation base.

Driver information: Fusion-io driver version: 2.3.10 build 110; Firmware v5.0.7, rev 107053

Following the format of previous benchmarks, first is …



  [Read more...]
Testing Intel SSD 520
+1 Vote Up -0Vote Down

Following my previous benchmarks of SATA SSD cards I got Intel SSD 520 240GB into my hands. In this post I show the results of raw IO performance of this card.

The benchmark methodology I described in previous posts, so let me jump directly to results.


  [Read more...]
Testing STEC SSD MACH16 200GB SLC
+2 Vote Up -0Vote Down

Following my previous benchmark of Samsung 830, today I want to show results for STEC MACH16 SATA card, 200GB size, this card is based on SLC, and regarding STEC website, it is an enterprise grade storage.

For tests I use sysbench fileio, 16KiB block size (to match workload from InnoDB, as this is primary usage for me), and recently I switched to use async IO mode. There are two reasons for that. First, …


  [Read more...]
Testing Samsung SSD SATA 256GB 830 – not all SSD created equal
+3 Vote Up -0Vote Down

I personally like PCIe based Flash, but from a pricing point our customers are looking for cheaper alternatives. SATA SSD is an options. There is many products based on MLC technology, and Intel 320 I would say is the most popular. I do not particularly like its write performance – I wrote about it before, that’s why I am looking for comparable alternatives. Samsung 830 256GB looked like a good product, that’s why I decided to test it.

For tests I use sysbench fileio, 16KiB block size (to match …


  [Read more...]
Benchmarks challenges of XtraDB Cluster
+1 Vote Up -0Vote Down

We are running internally a lot of benchmarks on our recently announced Percona XtraDB Cluster, and I am going to publish these results soon.
But before that I wanted to mention that proper benchmark of distributed system comes with a lot of challenges.
I am saying that not to complain, but to make sure, if you are going to benchmark XtraDB Cluster yourself, there is a lot of things to take into account.

And it seems that one component, which was not much important before, now …



  [Read more...]
Join Optimizations in MySQL 5.6 and MariaDB 5.5
+2 Vote Up -0Vote Down

This is the third blog post in the series of blog posts leading up to the talk comparing the optimizer enhancements in MySQL 5.6 and MariaDB 5.5. This blog post is targeted at the join related optimizations introduced in the optimizer. These optimizations are available in both MySQL 5.6 and MariaDB 5.5, and MariaDB 5.5 has introduced some additional optimizations which we will also look at, in this post.

Now let me briefly explain these optimizations.

Batched Key Access

  [Read more...]
What about the subqueries?
+0 Vote Up -0Vote Down

MySQL version 4.1 was quite revolutionary. The main reason for that was support for sub-queries.1

However since then MySQL users were rather discouraged to use that functionality, basically due to the implementation’s poor performance  and forced to build complicated queries based on joins rather than on subqueries.

Of course you can do some effort to optimize …

  [Read more...]
Multi Range Read (MRR) in MySQL 5.6 and MariaDB 5.5
+3 Vote Up -1Vote Down

This is the second blog post in the series of blog posts leading up to the talk comparing the optimizer enhancements in MySQL 5.6 and MariaDB 5.5. This blog post is aimed at the optimizer enhancement Multi Range Read (MRR). Its available in both MySQL 5.6 and MariaDB 5.5

Now let’s take a look at what this optimization actually is and what benefits it brings.

Multi Range Read

With traditional secondary index lookups, if the columns that are being fetched do not belong …

  [Read more...]
ext4 vs xfs on SSD
+4 Vote Up -0Vote Down

As ext4 is a standard de facto filesystem for many modern Linux system, I am getting a lot of question if this is good for SSD, or something else (i.e. xfs) should be used.
Traditionally our recommendation is xfs, and it comes to known problem in ext3, where IO gets serialized per i_node in O_DIRECT mode (check for example Domas’s post)

However from the results of my recent benchmarks I felt that this should be revisited.
While I am still running experiments, I would like to share earlier results what I have.

I use STEC SSD drive 200GB SLC SATA …





  [Read more...]
Index Condition Pushdown in MySQL 5.6 and MariaDB 5.5 and its performance impact
+1 Vote Up -0Vote Down

I have been working with Peter in preparation for the talk comparing the optimizer enhancements in MySQL 5.6 and MariaDB 5.5. We are taking a look at and benchmarking optimizer enhancements one by one. So in the same way this blog post is aimed at a new optimizer enhancement Index Condition Pushdown (ICP). Its available in both MySQL 5.6 and MariaDB 5.5

Now let’s take a look briefly at what this enhancement actually is, and what is it aimed at.

Index …

  [Read more...]
10 Newer Entries Showing entries 91 to 100 of 245 10 Older Entries

Planet MySQL © 1995, 2016, Oracle Corporation and/or its affiliates   Legal Policies | Your Privacy Rights | Terms of Use

Content reproduced on this site is the property of the respective copyright holders. It is not reviewed in advance by Oracle and does not necessarily represent the opinion of Oracle or any other party.