Quantcast
Channel: MySQL Performance Blog » Search Results » million record mysql
Browsing all 36 articles
Browse latest View live

Post: High-Performance Click Analysis with MySQL

…re aggregating per-day, an ad that gets a million impressions takes one row, and an ad that gets… You can have the clicks column record the total, and the blue_clicks column record only blue clicks;...

View Article



Comment: When is it a time to upgrade memory ?

… I have few reading queries but on large tables (~10 millions rows) and a lot lot of insertions queries on these… 4Go but the whole database size is almost 8Go (~60 millions records). This database...

View Article

Comment: MySQL Partitioning - can save you or kill you

… mind your suggestions about explain and force index use. The mysql 5.1 Manual Section 18.4 says –> This section discusses… very frequently. Deletion from MyISAM/InnoDb would happen everyday for...

View Article

Image may be NSFW.
Clik here to view.

Comment: Handling big result sets

…: 1000000. execution time: 24.53382897377 s mysql_unbuffered_query: (same code, only changing mysql_query to mysql_unbuffered_query) Number of rows: 1000000… 10+ million records in there. The query I...

View Article

Comment: What to tune in MySQL Server after installation

… these days with MySQL. I have a table that has 3.3 million records (size is around 500 MB) that stores records of members. Now I need to update the records of this table by reading data from a file...

View Article


Post: MySQL-Memcached or NOSQL Tokyo Tyrant - part 1

… record 1, cache record 500,001 …. get record 1, miss, read from disk, expunge record 500,001, cache record… application I can then compare using MySQL to using MySQL + Memcached, and then to other...

View Article

Comment: How to find wrong indexing with glance view

… moves from millions to 20 records, it makes all the difference. Then your database doesn’t have to walk over a million records to find those 20 records. One other thought, if your not working with...

View Article

Post: How to find MySQL queries worth optimizing ?

… if I index the table I get the following record in the slow query log: # Time: 120911 17:18:… are found and returned up to the top level MySQL part for processing are counted the Rows_examined...

View Article


Post: UDF -vs- MySQL Stored Function

… 7 million records: mysql> select count(*) from paintings where title != ltrim_junk(title); +———-+ | count(*) | +———-+ | 101533 | +———-+ 1 row in set (6.82 sec) mysql> select… case like this one...

View Article


Post: pt-online-schema-change and binlog_format

… I ran: Populate the db with four, 1 million row tables Restart MySQL to ensure an empty buffer pool (no LRU dump… to populate the shadow table Rename the tables after all records are copied In the...

View Article

Image may be NSFW.
Clik here to view.

Paul McCullagh answers your questions about PBXT

Following on from our earlier announcement, Paul McCullagh has responded with the answers to your questions – as well as a few I gathered from other Percona folks, and attendees of OpenSQL Camp. Thank...

View Article

Reasons for run-away main Innodb Tablespace

So you’re running MySQL With innodb_file_per_table option but your ibdata1 file which holds main (or system) tablespace have grown dramatically from its starting 10MB size. What could be the reason of...

View Article

Image may be NSFW.
Clik here to view.

Shard-Query turbo charges Infobright community edition (ICE)

Shard-Query is an open source tool kit which helps improve the performance of queries against a MySQL database by distributing the work over multiple machines and/or multiple cores. This is similar to...

View Article


Using any general purpose computer as a special purpose SIMD computer

Often times, from a computing perspective, one must run a function on a large amount of input. Often times, the same function must be run on many pieces of input, and this is a very expensive process...

View Article

Improved InnoDB fast index creation

One of the serious limitations in the fast index creation feature introduced in the InnoDB plugin is that it only works when indexes are explicitly created using ALTER TABLE or CREATE INDEX. Peter has...

View Article


The relationship between Innodb Log checkpointing and dirty Buffer pool pages

This is a time-honored topic, and there’s no shortage of articles on the topic on this blog. I wanted to write a post trying to condense and clarify those posts, as it has taken me a while to really...

View Article

Image may be NSFW.
Clik here to view.

Adventures in archiving

Archive can solve disk storage issues – but you must always consider the caveats and bugs related to a storage engine before going ahead and using it.One of our Remote DBA service clients recently had...

View Article


Image may be NSFW.
Clik here to view.

Using the new spatial functions in MySQL 5.6 for geo-enabled applications

Geo-enabled (or location enabled) applications are very common nowadays and many of them use MySQL. The common tasks for such applications are:Find all points of interests (i.e. coffee shops) around...

View Article

How to monitor ALTER TABLE progress in MySQL

While working on a recent support issue as a Percona Support Engineer,  I got one question from a customer asking how to monitor ALTER TABLE progress. Actually, for MySQL 5.5 and prior versions, it’s...

View Article

Image may be NSFW.
Clik here to view.

Q&A: Even More Deadly Mistakes of MySQL Development

On Wednesday I gave a presentation on “How to Avoid Even More Common (but Deadly) MySQL Development Mistakes” for Percona MySQL Webinars.  If you missed it, you can still register to view the recording...

View Article
Browsing all 36 articles
Browse latest View live




Latest Images