Linked Questions

64 votes
4 answers
140k views

Which is faster, InnoDB or MyISAM?

How can MyISAM be "faster" than InnoDB if MyISAM needs to do disk reads for the data? InnoDB uses the buffer pool for indexes and data, and MyISAM just for the index?
jcho360's user avatar
  • 1,999
38 votes
5 answers
58k views

Why are simple SELECTs on InnoDB 100x slower than on MyISAM?

I have quite an annoying problem. I want to use INNODB as my main database engine and give up on MyISAM as I need the former for using galera-cluster for redundancy. I copied (description follows) ...
jollyroger's user avatar
34 votes
3 answers
31k views

Is the CPU performance relevant for a database server?

This is a purely theoretical question. Let's say I have an application deployed on multiple servers. A load balancer, Multiple/scalable applications servers A (single) database server (for the ...
Zenklys's user avatar
  • 451
13 votes
3 answers
41k views

Cache MySQL database in memory

I am having problems with a website with 600MB of MySQL database. The website is way too slow. I noticed the bigger the MySQL database gets, the slower it goes. When it was 5MB, the website was very ...
grant tailor's user avatar
11 votes
2 answers
7k views

Any gotchas at all with converting from MyISAM to InnoDB?

I'm ready to move from MyISAM to InnoDB but wanted to know if there was a full list of things to look for? For example, I haven't seen any list mention that running DISABLE KEYS on an InnoDB table ...
Andrew's user avatar
  • 642
10 votes
2 answers
70k views

way to prevent queries from waiting for table level lock

We've encountered a problem after moving the database of our customer to an extra server. This should have had positive effects on the site's performance, but there is a problem with table locking in ...
32bitfloat's user avatar
10 votes
2 answers
16k views

MySQL 5.1 InnoDB Configuration / 24GB RAM - bi-xeon high load

i'm running a facebook app which currently has 300 - 600 concurrent users (and growing). To get the hardware ready for growing i changed my i7 / 12gb ram / 2x 80gb intel x25 ssd's (debian 5.0 / mysql ...
Kilian's user avatar
  • 201
8 votes
2 answers
38k views

MySql recommended hardware

Our company servers are currently hosted on a VPS and we've decided to move into dedicated servers. When choosing the best hardware for a DB server, what should we invest more resources: better CPU (...
Ran's user avatar
  • 1,553
8 votes
3 answers
4k views

MySQL High Performance for Lots of SELECTs/INSERTs/UPDATEs/DELETEs

I am creating a module where every user often gets a record into a table for 10 to 300 seconds. When the time expires a record gets deleted. The case is: there will be a lot of users and records will ...
Aivaras's user avatar
  • 183
7 votes
4 answers
8k views

Benefits of table level locking

What are the benefits of table level locking which is used by the MyISAM storage engine? Row level locking has lots of benefits like concurrent updates and reads that do not lock the table. Edit Its ...
Rick James's user avatar
  • 1,271
7 votes
1 answer
8k views

When to switch from MyISAM to InnoDB?

We have a MySQL 5.0 server running all tables as MyISAM. We have two slaves that, in the last month, we have upgraded to MySQL 5.5. Their tables are also still MyISAM. My original plan was to upgrade ...
Andrew's user avatar
  • 642
7 votes
3 answers
21k views

How to update a (very) large table without locking in MySQL

I have a large table (58+ million records) which represents a relation between two records (player and target) in a second table. Unfortunately, whoever designed our schema didn't think things ...
Olle's user avatar
  • 71
6 votes
2 answers
10k views

Query runs a long time in some newer MySQL versions

I have created a database on MySQL 5.0.15. I have a query and when I run this query on this MySQL version, I get 0.9 s run time. When I import this database to another MySQL server with same hardware ...
user3731's user avatar
  • 205
6 votes
2 answers
4k views

MySQL warm procedure

How do you usually warm up your database ? I run a similar queries to this for every table in DB: SELECT * FROM ip_log ORDER BY ID; SELECT ip, member_id FROM ip_log ORDER BY ip, member_id; Is that ...
Katafalkas's user avatar
6 votes
2 answers
6k views

mysql transaction vs lock

I have a question regarding MySQL locking and transaction management. My Question is ..does mysql takes lock on the the tuple/table on which I am doing select/update in a transaction ?
matang's user avatar
  • 235

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