0
votes
2answers
96 views

MySQL's InnoDb performance downfall

I'm trying to configure a MySQL production server using InnoDb and I can not get the performance I want out of it. I've used Percona tools to give me the following configurations: [mysql] # CLIENT # ...
3
votes
2answers
134 views

Dropping Index on 10GB+ InnoDB table takes over 4 hours

This is the table I'm working with: CREATE TABLE IF NOT EXISTS `checklist_answer` ( `id` varchar(36) NOT NULL, `created_by` varchar(36) NOT NULL, `date_created` datetime NOT NULL, ...
0
votes
1answer
497 views

Troubleshooting MySQL Performance Issues

Environment: 1 physical machine 8GB RAM some older Core2Duo CPU 1 HDD Windows Vista 64 bit 1 Virtual Machine 16 GB RAM 2 vCPUs Windows 7 64bit Both machines running MySQL 5.5.28 (64Bit) with ...
0
votes
2answers
587 views

MySQL InnoDB database 'hangs'

I have a problem with a MySql server causing it to freeze all the time. In phpMyAdmin when this happens I can see in "Show Processlist" are lots of processes for User "unauthenticated user" with ...
9
votes
2answers
10k views

Best Mysql cache settings for 8gb RAM dedicated mysql server using only Innodb (5gb database)

I'm a pretty big noob when it comes to setting up mysql for performance. And honestly I'm not worried about the fine tuning to squeeze every last bit of performance out of mysql, but I do know that ...
0
votes
1answer
174 views

Measuring Performance through SHOW INNODB STATUS;

When looking at the output of SHOW INNODB STATUS on mysql what are the most important values to be looking at, and what would be an indicator of poor performance? Specifically under FILE I/O and ...
0
votes
3answers
122 views

Explaining the MySQL Indexing

On my journey exploring MySQL and its advanced features, especially regarding the performance optimization I bumped in some extremely important feature for SQL performance improvement mos of us knows ...
0
votes
1answer
207 views

A Most Puzzling MySQL Problem: Queries Sporadically Slow

This is the most puzzling MySQL problem that I've encountered in my career as an administrator. Can anyone with MySQL mastery help me a bit on this?: Right now, I run an application that queries my ...
1
vote
1answer
231 views

Can I change a MySQL table back and forth between InnoDB and MyISAM without any problems?

I have a site with a decently big database, 3Gb in size, a couple of tables with a dozen million records. It's currently 100% on MyISAM, and I have the feeling that the server is going slower than it ...
2
votes
1answer
872 views

Join performance on MyISAM and InnoDB tables

I am thinking about converting some tables from MyISAM to InnoDB in my mysql server. The tables will certainly benefit from the change because a lot of write requests come to these tables, while there ...
3
votes
2answers
7k views

Why do MySQL queries pile up in “Sending data” state?

We're using InnoDB tables as the back end of a web application, and everything was fine for about two years until we had to restart MySQL a few weeks ago. (We hadn't disabled reverse DNS lookups, ...
1
vote
1answer
870 views

How to use most of memory available on MySQL

I've got a MySQL server which has both InnoDB and MyISAM tables. InnoDB tablespace is quite small under 4 GB. MyISAM is big ~250 GB in total of which 50 GB is for indexes. Our server has 32 GB of RAM ...
0
votes
1answer
635 views

MySQL innodb has lots of processes hanging in “update” state once every minute

Description of problem I have a fairly large MySQL installation. There are at least 3 separate servers which run the innoDB storage engine. Once every minute, at the same time each minute, for about ...
1
vote
2answers
287 views

Will deleting old MySQL data improve performance?

Would deleting old data from my tables improve MySQL query performance? When my queries use indexes? When my queries don't use indexes? When I use InnoDB? When I use MyISAM?
1
vote
3answers
2k views

How-to manage a MySQL table with over 2 million records

I have an InnoDB table running on MySQL 5.0.45 in CentOS. To make matters worse it is all running in a virtual machine. There are multiple tables that have the probability of exceeding 2 million ...
6
votes
5answers
15k views

How to improve MySQL INSERT and UPDATE performance?

This question can probably be asked on StackOverflow as well, but I'll try here first... Performance of INSERT and UPDATE statements in our database seems to be degrading and causing poor performance ...