Tagged Questions
0
votes
1answer
47 views
Large INSERTs performance optimization
I have 15 Amazon AWS EC2 t1.micro instances which simultaneously populate Amazon RDS MySQL d2.m2.xlarge database with data using large INSERTs (40000 rows in query).
The queries are send ...
0
votes
0answers
65 views
InnoDB tuning with 1G of ram limit
I am trying to calculate variable moving averages crossover with variable dates.
That is: I want to prompt the user for 3 values and 1 option. The input is through a web front end so I can build/edit ...
1
vote
1answer
36 views
Will OPTIMIZE TABLE have any impact on my data?
I'm having issues with a database that is getting quite slow. The analyzer in phpMyAdmin recommends that I run OPTIMIZE TABLE on my tables.
But before doing so, I would (of course) like to know if ...
1
vote
1answer
35 views
extra steps after changing storage engine and adding index
Someone told me to look into his website for quick optimization; I'm a programmer and i don't have much experience optimizing databases.
I have a php/MySQL site uses the MyISAM storage engine. It ...
3
votes
1answer
305 views
Mysql Server optimization tips needed! (InnoDB)
I've recently been trying to optimize our mysql server but I've encountered some pretty serious problems on the way. We're running a game server which is coded in C#. We have two dedicated servers. ...
1
vote
1answer
447 views
MySQL / InnoDB: Does daily optimization improve performance?
Would performing daily optimizations of tables increase performance for MySQL and InnoDB? I have never did this before, but I have seen this module for Drupal http://drupal.org/project/db_maintenance, ...
1
vote
1answer
120 views
Optimizing table and choosing storage engine
Having the follow MyISAM table:
+----------------------+-----------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
...
1
vote
1answer
589 views
Optimizing MySQL for Read-Only?
We have 14 GB worth of CSV's which total 138 million rows. I imported this into a MySQL table first with InnoDB, and then tried again with MyISAM. In both cases, a simple SELECT on primary key ...
2
votes
1answer
153 views
Changing to InnoDB increases iostat
I have changed my MyISAM tables to InnoDB and from that day, iostat is increasing continuously. My findings on the server say that mysqld is the one who is increasing iostat.
But how can it increase ...
5
votes
4answers
980 views
MySQL subquery slows down drastically, but they work fine independently
Query 1:
select distinct email from mybigtable where account_id=345
takes 0.1s
Query 2:
Select count(*) as total from mybigtable where account_id=123 and email IN (<include all from above ...
1
vote
2answers
2k views
What would be the fastest approach to bulk update this mysql table (Innodb)?
I have a table with 100M rows. I am able update my table like 850 updates / minute. How to speed this up?
I am using following approach:
mysql -uroot < query_file
where query_file contains 1M ...
1
vote
2answers
2k views
Scheduled optimization of tables in MySQL InnoDB
What is the best way to schedule automatic optimization of tables in a MySQL InnoDB database? Can I use events for example? I have recently had a big performance issue (when querying) with one of the ...
5
votes
2answers
1k views
Insert-heavy InnoDB table won't use all my CPU
I have a packet log database, which is almost never queried. It just needs to be fast on inserts. I'm using InnoDB because I'd like to maintain ACID compliance, since even losing a single packet could ...
1
vote
1answer
1k views
16 Cores 12 GB RAM server MySql Configuration - my.cnf
The server takes 20+ seconds (wait time/slow IO response time) to response to a HTTP request even with memcached and APC installed. I believe this has something to do with MYSQL since the site as lots ...
