0
votes
1answer
36 views

MySQL: What is SQL profiler, does it different for MySQL?

Whenever SQL profiling comes in mind, focus goes to two below sections: GUI tools like - MONyog, Neor Profile SQL set profiling =1; Execute Query; show profiles; show profile; I am really confuse ...
1
vote
1answer
33 views

What is the generally accepted method and tools for profiling MySQL queries?

Profiling database queries is difficult, and dependent on database technology. In MySQL, what is the usual (or, in deference to that, a great) process for profiling a query? For example: Run the ...
1
vote
0answers
62 views

Significant difference between duration for querys in SHOW PROFILE and SHOW PROFILES?

I have use mysql profiler to optimize an opencart query which takes more than 10 seconds to executes. mysql> SHOW PROFILES; ...
0
votes
0answers
99 views

Mysql profiler different duration information_schema.profiling

Hi! I have a problem and no idea how to resolve it. I'm trying to use mysql profiler. I'm using the command: set profiling=1; to turn it on. Later, i execute my query which is correlated ...
0
votes
0answers
80 views

can this mysql query be optimized further?

I have this query select counterparty_id, max(id) max_id from client_administrations where counterparty_type = 1 and effective_on <= '2013-10-22' group by counterparty_id When I ...
0
votes
1answer
215 views

How to profile a particularly slow or inefficient query

I'm currently writing queries for my database but this is the first time I've dealt with large data sets of any sort, and I'm now finding that I need to improve the performance of my queries. ...
2
votes
1answer
51 views

Is there any way to get the optimization time in MySQL?

I'd like to see the time optimizer takes to optimize a query. Is there any way to get that time?
1
vote
1answer
3k views

What does 'system lock' mean in mysql profiling a LOAD DATA INFILE statement?

2M rows inserted using LOAD DATA INFILE to innodb takes 7.5min, and profiling shows 99% of that time is in "System lock". Does this tell me anything useful? mysql> set profiling=1; ...
6
votes
3answers
5k views

Avoiding temporary tables while sorting by a column in a different table

So I have this MySQL InnoDB query here: SELECT s.vid, s.body, s.timestamp, COUNT(v.id) AS votecnt FROM stories s LEFT JOIN votes v ON s.vid = v.vid WHERE s.lv = 1 AND s.status = 1 GROUP BY s.vid ...