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10 Newer Entries Showing entries 31 to 40 of 628 10 Older Entries

Displaying posts with tag: database (reset)

The Road to MySQL 5.6 -- A DBA Perspective
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We've all heard the hype.  MySQL 5.6 is packed with amazing new features that address all our database problems.  5.6 deals with replication and HA and performance and monitoring and  …

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An approach to MySQL dynamic cross-reference query
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I’m using Redmine to manage projects and bug reports, I was needing a daily report with spent time by user on each project, nothing complicated, but I wanted a cross-reference result like Excel dynamic tables. As we know, MySQL doesn’t support dynamic cross-reference queries but I make an approach:

1. Write the main query with rows: project identifier, task subject and total hours in a date range.

SELECT p.identifier, 
        e.issue_id, i.subject, round(SUM(e.hours),2) AS total_hours
        FROM redmine_nsp.time_entries e
        INNER JOIN redmine_nsp.issues i ON e.issue_id = i.id
        INNER JOIN …
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Save 20% With MySQL Training and Certification Packages
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Get the best from both worlds with bundled packages: a training course and a certification exam voucher. You save 20% when you buy training and certification in discount packages.

Training helps you acquire product expertise. Certification proves this expertise to your future employers.

There are two MySQL Discount Packages: MySQL Database Administration and …

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My experience with node and mongodb course "M101JS: MongoDB for Node.js Developers" (Third Week)
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Well, currently I am into the third week of mongodb node course "M101JS: MongoDB for Node.js Developers" and I am pretty enjoying it.

Lots of personal learning into node and mongodb.

The third week subject of "Patterns, Case Studies & Tradeoffs" is really interesting.

Here is a list of topics, I learned about:
- Mongodb rich documents concept.
- Mongodb schema use cases.
- Mongodb one:one, one:many, many:many use cases.
- How to select schema based on the usage like whether you want max performance
  or it may be a tradeoff.














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Optimizing MySQL, Improving Performance of Database Servers
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Optimization involves improving the performance of a database server and queries that run against it. Optimization reduces query execution time and optimized queries benefit everyone that uses the server. When the server runs more smoothly and processes more queries with less, it performs better as a whole. To learn more about how a MySQL developer can make a difference with optimization, take the MySQL Developers training course.

This 5-day instructor-led course …

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How to grant create database for non-root users
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Introduction So here’s a recent requirement that I’ve just encountered. I have a shared MySQL database I have several users that I want them to be able to create new databases However, I don’t want them to see each other’s databases And just to be absolutely clear, I obviously don’t want to give them all […]

MySQL Enterprise Backup Improved Compression Algorithm for 3.10
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Background:

Prior to version 3.10, MySQL Enterprise Backup (MEB) used zlib compression for in-memory compression of datafiles. The compression worked by splitting the innodb datafiles into fixed size blocks and compressing each block independently.After searching on the web we found there are many compression algorithms available which can be used for compression. This triggered the idea of testing the performance of available compression algorithms. If the benchmark shows improved performance we can make backup and/or restore faster by adding the new compression algorithm to MEB.

Implementation :

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New! MySQL Utilities release-1.4.2-RC
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The MySQL Utilities Team is pleased to announce the latest release candidate (RC) release of MySQL Utilities. This release includes a number of improvements for useabilty, stability, and a few enhancements. A complete list of all improvements can be found in our release_notes.

New Utilities!
We have also included two new utilities.

  • The mysqlrplsync utility was added, which checks data consistency between servers in a replicated setup. 
  • The mysqlrplms utility was added, which provides …




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Announcing MySQL Connector/Arduino 1.0.2 Beta
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I've completed a new release of the Connector/Arduino! The new release contains some major improvements with memory handling.

  • The library has been trimmed to save memory.
    • Static strings moved to PROGMEM strings
    • Unused structures removed (e.g. ok_packet)
    • Moved two more methods to optional compilation
  • The WITH_SELECT is turned *OFF* by default. If you want to use select queries, be sure to uncomment this in the mysql.h file.
  • Added a CHANGES.txt file to track changes between releases.


Memory, What …


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No application changes needed: 10 times faster slave with MariaDB 10 parallel replication
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Parallel replication is in MariaDB 10.0. I did some benchmarks on the code in 10.0.9. The results are quite good! Here is a graph that shows a 10-times improvement when enabling parallel replication:

The graph shows the transaction per second as a function of number of slave worker threads, when the slave is executing events from the master at full speed. The master binlog was generated with sysbench oltp.lua. When the binlog is enabled on the slave and made crash-safe (--sync-binlog=1 --innodb-flush-log-at-trx-commit=1), the slave is about ten times faster at 12 worker threads …

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10 Newer Entries Showing entries 31 to 40 of 628 10 Older Entries

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