Post: TokuMX is MongoDB on steroids
…a MongoDB component in your setup. I actually started to use it as a service for queue in a system… – if you have 1,000 databases with 100 tables or collections each, it gets quite messy with 100.000…...
View ArticlePost: Percona Toolkit 2.2.3 released; bug fixes include pt-online-schema-change
… like YAPC, Velocity, and Percona MySQL University, we recently released Percona Toolkit…._t_new’ doesn’t exist”. This happens when the tool’s triggers cannot be… table, causing errors on write to the...
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Comment: What technologies are you running alongside MySQL?
I’m only allowed to select up to six choices while we use more than that… Maybe that’s an indication we’re doing something wrong? Anyway, some of the additional technologies used: Disco and Vertica.The...
View ArticlePost: Percona XtraDB Cluster 5.5.31-23.7.5 now available
…MySQL libraries when performing fresh CentOS installation. Bug fixed #1183669. The RPM installer script had the datadir hardcoded to /var/lib/mysql instead of using…When doing cascading Foreign Key...
View ArticlePost: Limited disk space? Compact backups with Percona Xtrabackup 2.1
…useful for those who have limited disk space to keep the database backup. Now let’s first understand how it works. When we are using…to make processes parallel. I have tried to test it with 3 tables...
View ArticlePost: Percona Server 5.6.12-60.4 second Release Candidate now available
… script had the server’s datadir hardcoded to /var/lib/mysql instead of using my_print_defaults function to get the correct datadir info. Bug fixed #1181753. Fixed the upstream bug #68354 that could...
View ArticlePost: pt-online-schema-change and binlog_format
…or row-based, or mixed? We’ve all seen this discussed at length so I’m not trying to…Restart MySQL to …how pt-osc and the buffer pool operate, these results make sense for this workload. Here is the...
View ArticlePost: 2 new features added to Percona XtraDB Cluster (PXC) since 5.5.31
… want to explain the benefits of these added features and how to use them….is no need to modify my.cnf or add parameters (when supported) to the init …1. This is useful as it will help to speed up SST...
View ArticleComment: GROUP_CONCAT useful GROUP BY extension
Also to change seporator value in case you have commas in your values you can define it with group_concat(table.value SEPARATOR ‘|’)The post Comment: GROUP_CONCAT useful GROUP BY extension appeared...
View ArticleComment: ZFS on Linux and MySQL
… solution (for the production DB servers) – it seems too good to be true.. the power of ZFS snapshots and the storage… sure that there are still going to be some fairly major code changes in order to...
View ArticlePost: innotop 1.9.1 released
….9.1. We’ve released a new version mainly to include MySQL 5.6 support as well as including some bugs fixed… error Issue 73: innotop fails to start if perl is not installed under /usr/bin/ Issue 74:...
View ArticlePost: MySQL Webinar: 5 proactive measures to help minimize MySQL downtime,...
… any needed changes to avoid production downtime in the future. The webinar is titled: “5 Proactive Measures to Minimize MySQL Downtime.” Later that… Cluster after my talk there. MySQL Performance...
View ArticlePost: MySQL and Hadoop integration
…process: Using MySQL Applier for Hadoop Sqoop is great if you need to perform a “batch” import. For a realtime data integration, we can use MySQL…to integrate MySQL and Hadoop (the big picture). In...
View ArticlePost: Crash-resistant replication: How to avoid MySQL replication errors
…or no errors on same row. How to solve this problem? Fortunately, Percona Server has a feature to…utility. I am going to use, This setting of 100000…to the slave eventually, but let me kill the slave...
View ArticleComment: MySQL and the SSB - Part 2 - MyISAM vs InnoDB low concurrency
… would love to see a benchmark done for MyISAM v InnoDB for larger data sets. Our organization has been using MyISAM for years on massive datasets (read: larger than what fits solely in RAM) and we...
View ArticleComment: Flexviews - part 3 - improving query performance using materialized...
… to process about 40 million records and crunching the records using group by queries to make it to about 4 million records and saving it to another table. and if we do the same process…The post...
View ArticlePost: Recovering temporal types in MySQL 5.6: TIME, TIMESTAMP and DATETIME
…one, two or three bytes long and can store up to six digits after…changed too. Thus, DATETIME uses only five bytes comparing to eight in previous versions… Let’s recover a sample table to see how it...
View ArticleComment: Debugging MySQL SSL problems
…. The reason I ask is that I am unable to use OpenSSL to connect to a MySQL server which is configured for SSL. The...
View ArticleComment: Replication in MySQL 5.6: GTIDs benefits and limitations - Part 2
When the slave A meet a primary dupicate key error,the binlog of a transaction will be splited to 2 transactions. If the binlog of the slave A be processed by another slave ,the...
View ArticleComment: MySQL Prepared Statements
… statements are complexly restrictive with dynamic queries . What do you or others reading this many-year old article think about safemysql… be to widely use a wrapper class like safemysql with...
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