What's the easiest way to find out how long it takes to evaluate a long-running MySQL query (longer than 10 minutes)?
The issue is that:
When I try to run it from MySQL Workbench, I get a timeout error.
When I look at the process list, sometimes the process finishes executing when I'm not looking and I don't know how long the script has taken.
Related
If the database is overloaded you'll get an increased number of queries running. Occasional spikes are OK for very short period of time. Too many active threads indicate that:
MySQL is taking too much time to process you requests.
You are continuously retrieving/updating large datasets.
Make sure that queries are tuned to use indexes. Execute SHOW FULL PROCESSLIST of find queries that are getting locked continuously. Try
isolating long running queries by enabling the slow query log.
any help please
The following is the list of process in my database
Is there anyways to solve my database performance problem. Whenever I run mysql query it takes about 1 minute or more than 1.
And find the following image to retrieve some records from the database it takes even longer.
I have a PDO connection to a MySQL database. Making the connection is lightening fast. Subsequently I run a very complicated query 1 (using temp tables, SELECT, INSERT and other operations all subsequently) which runs extremely fast (around 0.1 second). I know this query 1 is successfully executed every time.
Much further in the code I am opening a new PDO connection to do a simple SELECT statement. This SELECT statement seemed not to be fetching any results (it will only fetch results if the complicated query 1 is successfully finished).
As I opened a connection earlier to execute the complicated query 1 I thought I would have to close that one first. I added the below code to unset the connection. This helped. However, I can see now that it takes a few minutes to run only the piece of code: unset($stmt);
$stmt = $pdo->prepare($QUERY);
$stmt->execute();
unset($stmt);
unset($pdo);
Could it be that my complicated query is running in the background while I think it is finished, but it actually isn't?
My question is: Why does executing this code: unset($stmt); take so extremely long?
The query I was executing simply took too long and was still running on the background while the php parser continued.
I have a very slow query that is built by the ORM and I'm curios how could I find out the exact query being executed.
I cannot monitor it from the mysql-slow.log because it never finishes the execution (as in I don't have eternity to wait for it, more than an hour in an still waiting).
Also I cannot get the query from the ORM, just after execution. And the only way I think of getting it is from the process list.
show processlist \G
But my problem is that most of the query is trimmed of, even before the from keyword.
This question has been asked before but with no answer https://stackoverflow.com/questions/3741356/find-queries-from-process-id-mysql-5-1-x
Any suggestions?
If your query is formatted in multiple lines, some MySQL clients will only display the first line. To see full output run SHOW FULL PROCESSLIST; query in MySQL console.
I have several EVENTS executing every two seconds, I would like to kill those which are
running longer than 1 second.
Are there way to control query execution time on MySQL 5.5?
cheers Arman.
You can use the SHOW PROCESSLIST command to see running processes in MySQL.
Here's a link: http://dev.mysql.com/doc/refman/5.0/en/show-processlist.html.