Execution Time Of Queries
Approximately how much time would it take to execute a 3 column fulltext table with one million (plus) rows?
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Log Execution Queries
I am writing a program in python, and I use mySql v1.2.12, I wanna know If mysql logs any command such as wxecution commands(like INSERT, UPDATE, DELETE), if yes how can i access them? thanks all
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Execution Time
After we execute a statement in mysql, it reports the query execution time in the format: n rows in set (t sec). We may do something like this to get the execution time: $time_start = getmicrotime(); mysql_query( "" ); $time_end = getmicrotime(); $time = $time_end - $time_start; But it includes extra CPU time to run two getmicrotime() functions and one subtraction. Is there any way to obtain the execution time directly from mysql without running extra functions or calculations?
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How To Get Time Execution Of A Query?
Do you know how to get the time that a query executes? Is there a formula on how to get it? Example: Note: I have 5000 data in the table cars $result = mysql_query("Select * from cars"); Question: How to get time of executing the query above?
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Improve The Execution Time
i am new to db2 want to ask questions about the performance of my sql commands for a view based another 3 views the sql commnads are as following: create view b_central_subgroup as select communicator as central_member, project_id as project_id from b_normalized_communicator intersect select initiator as central_member, project_id as project_id from b_normalized_initiator intersect select monospeaker as central_member, project_id as project_id from b_normalized_monospeaker it takes 4.4 seconds to execute this sql. it likes that the time is the summ of the other three views. Can the execution time be reduced through some other methods? If it is possible , then how ?
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How To Get Query Execution Time
How to get query execution time in "mysqlquery.log" files I am using: Linux 7.3 mysql 4.1 How to display the query execution time for each and every query in log files. i have configured "slow-log-query" and "mysqlquery.log" in "my.cnf" is pasted below. log = /var/lib/mysql/mysqlquery.log log-slow-queries = /var/lib/mysql/slowquery.log long-query-time = 0 slow-launch-time = 1 then i can get a output in "mysqlquery.log" like, 070830 9:24:29 2 Connect root@localhost on 2 Init DB jbdatabase 2 Query select count(*) from vacancy1_table 2 Query select category,listcategory from category_t able order by category 2 Quit but i need to display the "timetaken of each end every executed query" along with the query in the above logfile like, E.g:select category,listcategory from category_table order by category(0.03 secs).
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Measure Execution Time
I would like to measure the execution time of my queries in order to evalutate the performance in/decrease for different changes. Even if I use 'sql_no_cache' the query executes MUCH faster the second time I run it, and is therefore not representative of the true performance. How to I avoid this problem? I'm using MySQL 4.1 on a windows server 2000. I be glad to get an explanation to why the query executes faster the 2nd time.
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Last Query Execution Time
Is there a way to retreive the elapsed time for the prevously executed query? Alternatively, Is there a way to query the current time in fractions of a second? I am attempting to use a stored procedure to execute and track the time it takes to run some queries and other commands. The logic of the stored proc would go something like this.....
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Query Log With Execution Time?
I have developed a big property portal web site and have probably written about 1000 different SQL queries in the process (OK, maybe only 500 or so) but a lot. The site is now gaining popularity and although it is on a dedicated server I want to make sure that everything is running smoothly. I have optimised several tables with indexes etc. and have sped up certain tasks, but would like to know if there are any other queries that take too long and should be optimised. Is there a way to log all queries together with the time it took to execute the query? Is this already logged and if so - where is it?
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Query Execution Time In PHP Script
I am interested in displaying the query execution time as mysql does from the console, but using php. I've looked everywhere for this and can't find anything. Does anyone know how to display this information to the browser via php? The information must be there since the console provides it. I checked the php function mysql_info(), but that only shows records, duplicates, deleted, matches, changed, warnings, etc. Didnt see any specific php function for getting execution time.
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Query Execution Time & Mysql_stat
I am using mysql for my shopping site,Performance of site very slow then I used mysql_stat php function to find out how many slow queries,it shows 20. Now my question is any function in mysql(or)PHP to show 20 slow queries.
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Database Size And Max Execution Time
I have now got a large database that is getting to a size of about 4Mb when downloaded (dumped / uncompressed).On my Web server everything seems fine. But when using said database on my home server (localhost) I am recieving Max Execution time of 30 second errors constantly.How can I stop this from happening and is it likely to start happening on my web server soon?
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Measure Execution Time Of Mysql Script
I am trying to measure the total execution time of a mysql script that I run using the mysql command line client in batch mode (-e "source myscript"). The --tee option does not work for the batch mode so that I could then gather and add up the execution times of the SQL queries as logged by the server. Adding a tee command in the script itself is not working. Using the time command (in Linux , and timex is not available) on the mysql program is also not helpful as I think it does not include the execution time of the queries on the mysql server side, but only the system and user times corresponding to the client process.
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Maximum Execution Time Of 300 Seconds Exceeded (was "MYSQL Error")
I have a huge database 400mb+ in size which i have exported into a .sql file. I tried to run this export script into a new database and it runs fine until three quarters into the scripts execution and the following error appears: ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '<br / > <b>Fatal error</b>: Maximum execution time of 300 seconds exceeded in <b' at li ne 1 I believe this error may relate to "delayed_insert_timeout = 300". How do I increase this limit in mysql - maybe it may solve the problem but then again it may not . Any advice is most gratefully appreciated - As you can imagine if the script runs fine for 3/4 of it and then an error appears, stating the error is on line 1, it will take me days to go through the whole script (hundreds of thousands of rows) to find the error as I assume the error does not reside on line 1 as this line would have been executed. I am running the script on mysql 5, and via source /path/****.sql on linux.
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Two Queries At The Same Time?
I have 2 queries: The {..} are precalculated values. At the beginning no item can be matched by both where clauses. 1) update tabelle set L = L + {MOVE} set R = R + {MOVE} where L >= {LEFT} and R <= {RIGHT} 2) update tabelle set L = L - {DIFF} set R = R - {DIFF} where L >= {OTHERLEFT} and R <= {OTHERRIGHT} My problem: If I run update 1 first, the update 2 can match items from where clause 1 because the update changed the values from L and R so that they can be found at where clause 2. And if I run 2 first its the same in the other direction. So how can I do the 2 where clauses first, and when mysql knows my items I would like to update so no item gets updatet twice.
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Analyze Table - Optimizing Time-consuming Queries
I'm starting a website-counter service, so basically my site requires a lot of mysql activity. Here are the two tables I use: CREATE TABLE `traffictrack` ( `id` int(11) NOT NULL auto_increment, `nr` int(11) NOT NULL default Ɔ', `ip` int(10) unsigned NOT NULL default Ɔ', `ndate` datetime NOT NULL default ��-00-00 00:00:00', PRIMARY KEY (`id`), KEY `ndate` (`ndate`) ) CREATE TABLE `tracker` ( `nr` int(11) NOT NULL auto_increment, `email` varchar(70) NOT NULL default '', `password` varchar(220) NOT NULL default '', `mdate` datetime NOT NULL default ��-00-00 00:00:00', `ip` int(10) unsigned NOT NULL default Ɔ', `image` varchar(200) NOT NULL default '', `friendid` int(11) NOT NULL default Ɔ', KEY `mdate` (`mdate`), KEY `nr` (`nr`) ) I have some queries that take up more than 1 second: PHP SELECT INET_NTOA(traffictrack.ip) as ip, tracker.image, UNIX_TIMESTAMP(traffictrack.ndate) as ndate, tracker.friendid, ( UNIX_TIMESTAMP(NOW()) - UNIX_TIMESTAMP(traffictrack.ndate) ) as dif FROM traffictrack LEFT JOIN tracker USING(ip) WHERE traffictrack.nr = ?' AND DATE_FORMAT(traffictrack.ndate, '%Y-%m-%d')=��-07-23' ORDER BY traffictrack.ndate DESC LIMIT 20 also: PHP SELECT COUNT( traffictrack.ndate ) AS total, tracker.image, tracker.friendid, UNIX_TIMESTAMP(traffictrack.ndate) as timest FROM traffictrack LEFT JOIN tracker USING ( ip ) WHERE traffictrack.nr = ?' AND ( UNIX_TIMESTAMP( ) - UNIX_TIMESTAMP( traffictrack.ndate ) ) < 600 GROUP BY tracker.nr LIMIT 0 , 30 I believe it's because my tables are badly indexed, I added an EXPLAIN before these two queries, they both ended up with: id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE traffictrack ALL NULL NULL NULL NULL 34246 Using where; Using temporary; Using filesort 1 SIMPLE tracker ALL NULL NULL NULL NULL 20972 If someone knows how to speed up my queries, please help.
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Slow Queries When Using Views Compare To Direct Table Queries
I’ve having problems with my server load for a while now. I have two tables with different content, but I need to display them in the same results, so I created a view with a union all (named: top_news_videos). The problem that I’m seeing is that when running a select to the view it takes a lot longer (and in that way, more server intensive) than running the query directly to one of the tables. For example, I created a page where I run 7 queries similar to this one: MySQL Code: ...
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Complex Queries Versus Multiple Simple Queries
I am constructing a database to contain information about stories posted on my site. Information included will be things like title, author(s), genre(s), story codes, synopsis, etc. I worked out that storing this information properly, so that it can all be searched on, could take as many as ten tables. My question is this: Is a single complex query really better (more efficient for the server) than multiple simple queries? In other words, I may need the information for as many as 25 or even 50 stories for a single page. Is it better to get all of the information out of a single, massive, complex query, or is it acceptable to get the information essentially one story at a time, which could mean 25 or 50 simple queries...?
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Many Smaller Queries Vs. Large Comlicated Queries
I am wondering if any one can help me. I have a page that will run around 85 smaller queries but if i combine the queries it will go down by almost half. This page is a high traffic page and I don't a complicated query taking up mysql resources while it created a temp table and such. My question is this: Is it better for mysql to run a lot of smaller queries (ex: simple selects with zero or one join, group by) or one larger complicated query with everything combined. The thing i have to keep in mind is that the mysql selects are comming off the localhost that the web server is also running on so they share the same resources.
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Long Queries VS Multiple Short Queries
I have a php script that requests a very long query from our mysql database. It has lots of joins and accesses at least 5-6 tables. My question is should i break it up into smaller separate queries or leave it as one long one, in regards to best practices?
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Ending Of Execution
is it important to free resources and end connection after every code execution... i found a few codes examples and they don't usually end with DIE or EXIT... so i'm curious if thats a security risk?
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Asynchronous Execution
I have the following situation php file 1: an SQL writes data to the database php file 2: an SQL reads data from the database Some users report errors that MIGHT be due to the SQL in file 1 not being executed, before they click on a link to open file 2. So they get out of date information. I want to know if this is technically possible, whether this might indeed be the problem, that if a database is very busy, that SQL statements are queued and data retrieval may read obsolete out of date information, because the data storage SQL has not been executed yet. And if this is the problem, I would like to wait in file 1 until the data has actually been written.
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Mysql WHERE Condition Execution
I have 2 columns and I search rows with two conditions. SELECT * FROM table WHERE A = '$a' AND B = '$b' How can I make mysql search columns with A condition first and after that within these condition B. I would like to know, how mysql search works. How can I tell mysql how to search?
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Query Execution Too Slow!
I have migrated from MySQL 4.1.22 to MySQL 5.0.45. Many of the queries that were working on my old server is working too slow in my new server(MySQL version 5.0.45). I am not aware why is this happening. Actually there is no error message or query failing. The query is executing, but the time taking to execute the query is too long. This problem is not occurring for all queirs, but only for some complex queires, that is queries with Left Join or Right Join, Group By etc. I have also checked the MySQL details through SSH(that is by mysql> SHOW VARIABLES;) Now one thing I found is there is lot of difference in key_buffer_size, table_cache, join_buffer_size, read_buffer_size, read_rnd_buffer_size , table_cache etc between my new server MySQL and old server MySQL. Will this be the reason for query execution taking too much time. Can any one guide me why this is happening. The striking thing is that these quires was working very much fine and faster in my old server.
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Mysql Execution Sequence
I need to retrieve the last value from a column in a mysql table, perform some actions on it, then add 1 to the original value and store a new entry. I am worried that if multiple users access the database at the same time I will end up with duplicated 'new values'. Does mysql complete execution of a script before it allows access to another user or do I need to 'lock' the table in some way while the script executes?
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Slow Query Execution
Right now I am fazing one issue which is getting hell out of me. I am explaining the issues step by step. 1.I have one site running from last 3 years with large database and there is one main table which has maximum load. 2.Now, I have redesigned the site with lots of changes within this table too. 3.The problem is that the server is same, queries are same but output in the new database is taking 50 times more execution time. 4.I also just copy paste the table, and fire the same query... Strange even that is not working... Is it something where newly added table or database is having issues in the server? I have tried all, compared the structures of the data and table but still the query result is too slow on live testing sever. While same query in main site of same server is running perfectly.
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Copying Table To Disk During Execution
I seem to be having an issue with a query's results being paged out to disk during runtime. I notice in processlist it saying "Copying to tmp table on disk". select col1, col2, count(ip) as 'COUNT' from db.table group by 2 order by 1, 3; None of the columns are a primary/foreign or an index. This query returns 92K rows and has taken anywhere from 50 seconds to run to over 1.5 minutes. The table size on disk is around 33MB. After doing some research i found that i should be changing the tmp_table_size system variable. Originally it was set to the MySQL default, 33554432. I set the varaible to 90,000,000 and it still started paging out to the disk (this was the only query running at the time). I would think that 90MB in space would have been enough to handle the query since that would assume over 600K row size. I actually had some trouble setting the tmp_table_size for the global variable but was able to change it as a session variable. I have also tried altering the query_cache variable (which has only slowed the query down - currently it sits at a size of 50MB) and also the sort_buffer_size but neither have made a difference. What is the magic variable that i should be messing with?
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Report Of Query Execution Times
Does mysql have a tool to record and report a list of all queries executed and how long it took to execute each query? If not can anyone suggest a tool I can use to do this? I've heard of mysql query profiler but does it capture queries from all sessions?
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Mysql Shuts Down During Rapid Execution Of Querys
I am using version 4.0.12-nt of MySQL and when I hit the enter key rapidly I can't connect to the database. The result is a message is returned to me from mysql that says I can't connect because the database is down. If I only hit the 'enter' key once (to execute the page that my queries are on(their are four queries on this particular web page)) my queries execute just fine. We have noticed that this only happens when we:
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Slow Query Execution With Strange Issue
Right now I am fazing one issue which is getting hell out of me. I am explaining the issues step by step. 1.I have one site running from last 3 years with large database and there is one main table which has maximum load. 2.Now, I have redesigned the site with lots of changes within this table too. 3.the problem is that the server is same, queries are same but output in the new database is taking 50 times more time. I have tried all, compared the structures of the data and table but still the query result is too slow on live testing sever. While same query in main site of same server is running perfectly. Have any one fazed such and issue? Please help me out of the situation as site is ready but I m not able to put new version live.
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Check Query For Syntax Prior To Execution
I was wondering if it was at all possible to check an SQL query prior to execution for syntax errors? A method which wouldn't alter the data to which the SQL statement related to. I'm guessing you could perform a transaction of sorts, but is there another way?
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Printing Debugging Info Into A File During Script Execution
I've got a very large script (~50GB) that takes a very long time to execute. I want to echo text into a output file at various places during the execution. Something like: ... select 'message 1'; ... select 'message 2'; ... If the script is: doit.sql, then I just do: mysql -uUSER -pPASS < doit.sql > log.out The problem is that I can't see the information in log.out because STDOUT is not flushed until the buffer is full. So, I thought I'd do something like: select 'message 1' into outfile 'log.out'; Unfortunately, mysql doesn't append to log.out. So, how can I get logging information into the log.out file so that I can let the script run in the background and just do something like: tail log.out to see the most recent messages and know that they are not being kept in some buffer pending output. This script takes about 2-3 days to complete and I want some method of seeing what things the script has done. The messages I have in the sql script make it very easy for me to know just what has been done, but don't do me any good if they're in some darned STDOUT buffer.
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Slow Execution For A Left Outer Join Query
Whats likely to be the cause of slow execution for a left outer join query? The original query joins three tables but even if I narrow it down to one it still takes a long time to execute. $query = "select distinct materials.* from materials"; $query .= " left outer join materials_products on materials.material_id = materials_products.material_id"; There's 914 rows in the materials table and 1348 row in the materials_products table Is it likely to take a long time for this amount of data or is there likely to be a problem in the table(s) set up or query?
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Can't Connect To MySQL Server On 'localhost' (10061) On Script Execution
Whenever I run this script: <?php $mysqli = mysqli_connect("localhost", "root", "rootnow"); if (mysqli_connect_errno()) { printf("Connect failed: %s ", mysqli_connect_error()); exit(); } else { printf("Host information: %s ", mysqli_get_host_info($mysqli)); mysqli_close($mysqli); } ?> I get this error message: Connect failed: Can't connect to MySQL server on 'localhost' (10061) I'm running Apache 2.0.58 with PHP 5.1.4 and MySQL 5.0.20 on Windows XP Home Edition.
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PHP/MySQL Sorting By Date & Time (using Non Military Time)
This is probably a simple issue but I have searched online and can't find an answer. I am using PHP/MySQL and I guess the most intuitive would be to have three select boxes containing HOUR / MINUTE / AM,PM option. Then store the time into mysql using there functions so I can output the data sorting them all by date and time. All the examples I have seen are for military time only but I'm sure there has got to be a simple mysql function or php function that converts non military to military and a formatting function to display with the AM / PM. But I have not found it.
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Compare Time Posted With Current Time Not Working
May I know how to get records with interval of 1 hour in database where the posting time is in this format '2008-05-15 00:10:40' I tried with this : $query="SELECT date,name FROM message WHERE (timediff(date,NOW())<=CRUDATE() CURTIME())"; But is not working. May I know what is the correct way of doing it?
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Minutes + TIME = TIME Function
I need some way to convert minutes (e.g. 80 mins) to SQL TIME (e.g. 01:20:00) in order to add it to another TIME var. Is there any way to do this? I really dont want to convert my whole db. Basically, I want to do: e.g. 80 + 10:00:00 = 11:20:00.
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How To Retrieve Mean Time Between Time Stamps
I have a table that stores failure information of external application. The time stamp of every failure event is stored. Now I'd like to make some system performance & reliability statistics calculations based on time stamps in certain recordset; mean time between failure MTBF, down time DT, etc. Example: 2007-09-27 12:23:52 2007-09-27 08:50:23 2007-09-26 23:31:34 2007-09-26 21:45:33 Here the times between are (hours:mins): 3:33, 9:18, 1:46 and MTBF=4:52 Any effective possibility to make this example within a single query - or a procedure is needed?
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Time Format Military Time
I know the time format it HH:MM:SS in mysql but can I input military time? reason I can is that I want to later extract that information for calculations and military time is easier to work with.
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