In this blog, we’ll look at ICP counters in the information_schema.INNODB_METRICS. This is part two of the Index Condition Pushdown (ICP) counters blog post series. 

As mentioned in the previous post, in this blog we will look at how to check on ICP counters on MySQL and Percona Server for MySQL. This also applies to MariaDB, since the INNODB_METRICS table is also available for MariaDB (as opposed to the Handler_icp_% counters being MariaDB-specific). We will use the same table and data set as in the previous post.

For simplicity we’ll show the examples on MySQL 5.7.18, but they …

Kristian Nielsen is working on a new feature for MariaDB 10.3 and he published very interesting results.  This feature is MDEV-12179: Per-engine mysql.gtid_slave_pos tables.  He writes about replicating twice as fast in the worst case when using two storage engines (InnoDB and MariaRocks in his tests, but could also be InnoDB and TokuDB or TokuDB and MyRocks).  I will let you read all the details

The slides and videos from the Percona Live Open Source Database Conference 2017 are available for viewing and download. The videos and slides cover the keynotes, breakout sessions and MySQL and MongoDB 101 sessions.

To view slides, go to the Percona Live agenda, and select the talk you want slides for from the schedule, and click through to the talk web page. The slides are available below the talk description. There is also a page with all the slides that is searchable by topic, talk title, speaker, company or keywords.

To view videos, go to the …

“The MySQL to be explored ” this is what i felt when i worked with it, and just going to share my experience with Aurora .

Recently we had an call for MySQL Consulting from one of the famous fantasy gaming site in India, stating that “Database (MySQL) is our bottleneck”, they want it to be stabilised before the major league match of this year (2017).

As a fast growing startup they have hosted their Infra on cloud (AWS).  On further discussion it was revealed that they were using AWS AURORA MySQL for their production DB. Next question from our consulting team was

“why Aurora?”,

•  Synchronous data across nodes within a lag of 100ms ( mostly ).
•  Auto Scaling and Performance .
• High Availability of database. …

Percona announces the GA release of Percona Server for MySQL 5.7.18-14 on May 12, 2017. Download the latest version from the Percona web site or the Percona Software Repositories. You can also run Docker containers from the images in the Docker Hub repository.

Based on MySQL 5.7.18, including all the bug fixes in it, Percona Server for MySQL 5.7.18-14 is the current GA release in the Percona Server for MySQL 5.7 series. Percona’s …

As promised, here is the follow up of the MySQL 8.0-dev Progress teaser ;-)
so, yes, we expect to see the most hot contentions gone, as it's seen from the following graph : Observations :

• the graph is representing the spin waits / spin rounds events happening during the same Sysbench Update-NoKEY workload
• the load is progressing from 8 concurrent users to 16, 32, .. 512
• 3 engines are tested one after one : MySQL 5.7, MySQL 8.0 (current DMR), MySQL 8.0-dev (current prototype)
• first all 3 engines are running on 22cores-HT only (1 CPU socket)
• then, the second time : on 44cores-HT (2 CPU sockets)
• and the most important thing to retain about this graph is that on 8.0-dev we see all main hot contentions gone ;-)

Read more... (4 …

In this blog post, I’ll review how a hung MySQL transaction can cause the InnoDB history length to grow and negatively affect MySQL performance.

Recently I was helping a customer discover why SELECT queries were running slower and slower until the server restarts (which got things back to normal). It took some time to get from that symptom to a final diagnosis. Please follow me on the journey of chasing this strange MySQL behavior!

Symptoms

Changes in the query response time can mean tons of things. We can check everything from the query plan to the disk performance. However, fixing it with a restart is less common. After looking at “show engine innodb status”, I noticed some strange lines:

Trx read view will not see trx with id >= 41271309593, sees < 41268384363
---TRANSACTION 41271309586, ACTIVE 766132 sec
2 lock struct(s), heap size 376, 0 row lock(s), undo log entries 1 …

InnoDB Cluster was released as GA a few weeks ago. I remember the initial announcement of the product at OOW 2016, promising a seamless solution for replication and high availability with great ease of use. I was a bit disappointed to see that, at GA release time, the InnoDB Cluster is a patchwork of three separate products (Group Replication, MySQL Router, MySQL Shell) which the users have to collect and install separately.

Given this situation, I was very pleased when Matthew Lord published Docker-InnoDB-Cluster, an image for Docker that contains everything you need to get the system up and running. The …

I heard a frequent question at last week’s Percona Live conference regarding Percona Monitoring and Management (PMM): How much disk space should I allocate for PMM Server?

First, let’s review the three components of Percona Monitoring and Management that consume non-negligible disk space:

1. Prometheus data source for the time series metrics
2. Query Analytics (QAN) which uses Percona Server XtraDB (Percona’s enhanced version of the InnoDB storage engine)
3. Orchestrator, also backed by Percona Server XtraDB

Of these, you’ll find that Prometheus is generally your largest consumer of disk space. Prometheus hits a steady state of disk utilization once you reach the defined storage.local.retention period. If you deploy Percona Monitoring and Management …

From everyone at Percona and Percona Live 2017, we’d like to send a big thank you to all our sponsors, exhibitors, and attendees at this year’s conference.

This year’s conference was an outstanding success! The event brought the open source database community together, with a technical emphasis on the core topics of MySQL, MariaDB, MongoDB, PostgreSQL, AWS, RocksDB, time series, monitoring and other open source database technologies.

We will be posting tutorial and session presentation slides at the Percona Live site, and all of them should be available shortly. 

Highlights This Year:

• Informative tutorials on day one, including …