mysql fetching takes too long

I can get all the results back, without testing KeyStatus, in 2 seconds. 180k rows) and the table has 65 columns. Remove Useless Entries From Magento Database. 10 essential MySQL performance tuning tips, Thoughts on the issue, thrown in random order: The obvious index for this query is: (rated_user_id, rating) . and it only return 29K rows. However 64% of 10 minutes is still far too long. I've made a page wich is a kind of an "Interactive Determinator of minerals". How to repeat: - Start Workbench and open the sql editor with a connection to MySQL 5.6.7-rc-log - Open new query tab (CTRL + T) - Execute: CREATE SCHEMA `slow`; Use `slow`; CREATE TABLE `tblSlow` ( `Id` INT NOT NULL AUTO_INCREMENT , PRIMARY KEY (`Id`) ) ENGINE = InnoDB; - Refresh the object browser that it displays the slow schema - go to the tblslow and click 'Select Rows - Limit 1000' in the context … Copyright ©document.write(new Date().getFullYear()); All Rights Reserved, How to store a string in char pointer in C, Split view controller multiple detail views Swift, Conflict management skills in the workplace. ... You're wasting time with this, too. You may do your processes on Phpmyadmin manuelly or with Sql Code. share | improve this answer | follow | answered Nov 10 '17 at 12:21. ypercubeᵀᴹ ypercubeᵀᴹ. Whether that is take too long or create too large a packet. You use mysql with an interface -> (PhpMyAdmin). mysql_unbuffered_query() sends the SQL query query to MySQL without automatically fetching and buffering the result rows as mysql_query() does. Juan Rene Ramirez Monarrez, [12 Mar 2013 14:09] More precisely Duration / Fetch = 0.484 sec / 27.441 sec. I'm running Windows Server 2008 with MySQL installed and every time I reboot the server the MySQL Service doesn't start right away. Denis Lapuente Created August 09, 2019 16:31. The first run may be too long since the data should be read from the disk into the memory. But basically the application is doing something that the database server doesn't like. However it could be an indication of inefficient coding. PREV HOME UP  MySQL provides optimizer control through system variables that affect how query plans are evaluated, switchable optimizations, optimizer and index hints, and the optimizer cost model. MySQL fetch time optimization, When I'm trying to execute query that selects points that are spatially near to the query points, total execution time takes too long. You can specify a width of up to 11 digits. The answers/resolutions are collected from stackoverflow, are licensed under Creative Commons Attribution-ShareAlike license. to 1000K rows the information is displayed in a reasonable amount of time, if the limit is removed then it takes a long time of course, but at the end the information is displayed too. The shorter the better. Try not to use HAVING clause in SELECT statements. If unsigned, the allowable range is from 0 to 4294967295. 1:- Check Indexes. 1. 1,717 Views. This is an open discussion with 17 replies, filed under Troubleshooting. A fix has been committed to drastically improve performance. 0. Load Data Infile takes a long time. Newbie: Joined: Mon Mar 06, 2017 9:15 am Posts: 18 Hi , i just built an application with Hibernate, which use an MySql database. Also, depending on the table size, modifying table structure with ALTER command can be a long running operation. Learn how to speed it Use indexes to avoid unnecessary passes through tables. 0. © 2020, Oracle Corporation and/or its affiliates, [18 Sep 2012 14:50] That last part might sound backward and nonintuitive. My issue is that the "Fetch" time of the first query below is 1.2sec (HUGE!!) Newbie: Joined: Mon Mar 06, 2017 9:15 am Posts: 18 Hi , i just built an application with Hibernate, which use an MySql database. They don’t know why it is slow but they do know the session that is running too slow based on the connection and session properties. Content reproduced on this site is the property of the I don’t think it should take that long to load. Originally using SQLite but I'm in the process of moving over to mySQL. Mysql + big tables = slow queries?, The main thing you can do is to add indexes. SELECT CONCAT ( 'SELECT `chef_orders_pending_temp`.item_id,`chef_orders_pending_temp`.itemName,`chef_orders_pending_temp`.order_date', GROUP_CONCAT ( ' , `t_', REPLACE (Outlet_name, '`', '``' ), '`.QtyRequested AS `', REPLACE (Outlet_name, '`', '``' ), '`' SEPARATOR '' ), ' FROM `chef_orders_pending_temp` ', GROUP_CONCAT ( ' LEFT JOIN `chef_orders_pending_temp` AS `t. Data is been fetched from 7 tables. It seems that it takes too long when fetching large amount of dataset, I used pandas read_sql to get the result, but the performance is same when using session.fetchall() directly. Table approximately has 300,00,000 rows. With large trx logs (and big innodb buffer pool), InnoDB takes long time to shutdown – often 10-15 minutes or more, Right after a restart, query performance is crippled for hours until the server warms-up. There isn't one on your created  MySQL index creation, if it has to swap to disk, can take a loooong time, especially on hardware with insufficient RAM or slow disks, or when MySQL is configured to be stingy with its use of RAM from the OS. The default behavior is generally to fetch the whole result and buffer it in memory. I have written php script which basically scans every directory in my local hard disc, checks which files are images, sets a counter of the number of images found per folder and saves this count in a MySQL … With a key in a joined table, it sometimes returns data quickly and other times takes unbelievable time. If you want a mysql transaction you need to SQLSetProp(h,"Transactions",2) and then end with SqlCommit(h) or SqlRollback(h). Why would it take another 600 seconds to test the keyStatus field as well? I noticed that mysql is highly unpredictable with the time it takes to return records from a large table (mine has about 100 million records in one table), despite having all the necessary indices. Portions of this website are copyright © 2001, 2002 The PHP Group, Page generated in 0.032 sec. 1 Solution. Variable-length columns are an exception to the rule that column values are stored in B-tree index nodes. 1.Query must be written in the proper manner. When the same sql query directly runs on Oracle database through TOAD it is taking 2 minutes. MySQL has a built-in slow query log. This doesn't mean that you should add  I have large table of product in eshop (appx. Andulvar Johanssen, Microsoft Windows (Microsoft Windows Server 2003, Enterprise Edition Service Pack 2 (build 3790)). The weirdest point is that for a similar query made on oldest tables and much bigger, the executing time is lower. It's not impossible on a slow server for index creation ona large table to take an hour or more. Execution of a PHP code takes too long Archived. Collecting git changes takes too long time Follow. Whether that is take too long or create too large a packet. I have 2 large tables on MySQL, users with 1538 rows, and ads with 5414 rows, when i try to load both of them and display their data on a HTML table, the page slows down, and takes around 10 seconds just to render these tables . Here is the result comparision for sample size = 10000, 50000, 100000, 500000. mysql_unbuffered_query() sends the SQL query query to MySQL without automatically fetching and buffering the result rows as mysql_query() does. In MySQL, the single query runs as a single thread (with exception of MySQL Cluster) and MySQL issues IO requests one by one for query execution, which means if single query execution time is your concern, many hard drives and a large number of CPUs will not help. 8.9 Controlling the Query Optimizer, MySQL provides optimizer control through system variables that affect how query plans are evaluated, switchable optimizations, optimizer and index hints, and  Once you append the query before an SQL statement, MySQL displays information from the optimizer about the intended execution plan. 2.Use the indexes if possible. << Thank you! For a short-span transaction, it should be executed as fast as possible, usually in a matter of subsecond. 1.Query must be written in the proper manner. Viewed 11k times 1. However, if your table has more than 10 rows, they can considerably reduce select query execution time. If logging reveals that individual queries are taking too long, you’d need a breakdown of how much time was spent within the database processing the query, sending results over the network, being handled by the DBAPI, and finally being received by SQLAlchemy’s result set and/or ORM layer. 2:- There should be indexes on all fields used in the WHERE and JOIN portions of the SQL statement 3:- Limit Size of Your Working Data Set. New Topic. Jan 26, 2004 at 6:36 pm: I have a fairly simple query where I feel it takes too long to run. This isn't something we can help with because Chrome uses its native fetch implementation rather than this polyfill code. Posted: Tue Apr 04, 2017 10:50 am . It also can be faster to do this in chunks … Also, depending on the table … Let’s go through all the steps one by one. SELECT Products.NSIPartNumber,Products.Cost, Products.ModelNo, Products.USPrice, Products.VendorPart, Products.Description , Products.ProductID, Sum(tblInvTransaction.Qty) AS SumOfQty FROM Products LEFT JOIN tblInvTransaction ON … I have a very weird problem on my PHP5.3/Apache/MySQL … Set long_query_time to the number of seconds that a query should take to be considered slow, say 0.2. Sometimes Internet Explorer opens it right away. Phpmyadmin is handy tool. Oracle or any other party. More precisely  Basically this table contains points of interest of an image with respective descriptors. This attribute as documented in the Python Database specification controls how many rows are fetched at one time. respective copyright holders.It is not reviewed in advance Andulvar Johanssen, [18 Mar 2013 18:47] This topic is now archived and is closed to further replies. Last Modified: 2012-05-12. Yeah yeah I know its quite a lot, but I store there information about books, dvds, bluerays and games. Test, However If possible i will try to normalize my table structure to reduce teh execution time further . Hide Copy Code. Bad scripting causes delay as well. How to design SQL queries with better performance: SELECT * and , Learn how to make your SQL queries faster than superman on Red-Bull. I'd archive older data when it reached that point. When you code all queries with SELECT, you pull off more data than you need. Set slow_query_log_file to the path where you want to save the file. I have an InnoDB database running as a Local Instance. it executes 24 seconds.. how to reduce the execution time.. To use it, open the my.cnf file and set the slow_query_log variable to "On." Fetch time – measures how long transferring fetched results take, which has nothing to do with query execution. I have an InnoDB database running as a Local Instance. My issue is that the "Fetch" time of the first query below is 1.2sec (HUGE!!) Some analytic and batch operations are supposed to be long running queries, so we can skip those for now. I would be glad if some of you can help me. Tables are fully normalized, frequently updated but are mostly read approximately 100 times a day. To use it, open the my.cnf file and set the slow_query_log variable to "On." Regarding the record selection, if the fetch is limited, i.e. Start new topic; Prev; 1; 2; Next; Page 1 of 2 . Some of the memory allocation per thread is done by MySQL itself for running complex processes/queries like “stored procedures” and it can take an unlimited amount of memory while running. If no results found for the query, then mysqli_fetch_row() will return NULL. The same query gets executed 7,00,000 times in a single day with updated data. MySQL has a built-in slow query log. Why MySQL Could Be Slow With Large Tables?, Peter Zaitsev explains how to optimize your MySQL table design So if you're dealing with large data sets and complex queries here are few  For example, how large were your MySQL tables, system specs, how slow were your queries, what were the results of your explains, etc. Avoid using UPDATE instead of CASE. INT − A normal-sized integer that can be signed or unsigned. Duration of query and fetching too long... New topic Register Log in 4 posts. SAP Knowledge Base Article - Preview. Any way thanks for the solution and once solved i will post my original query here . I have an InnoDB database running as a Local Instance. Also the primary key is the combination of all 6 of these columns. Post subject: Fetching Hibernate entities take too long. Luckily you only have to create the index once. Assuming it is walking through a B+Tree and it is sitting at the 'next' row. By marz, September 21, 2010 in PHP Coding Help. MYSQL join taking too long to execute. Overall a bulk load operation, eg adding data via CSV, surely is faster from mysql. Set slow_query_log_file to the path where you want to save the file. I have a snippet of code like below : … I tested this on 5.2.35, 5.2.39 and 5.2.42 with similar results. Up to a few minutes on a local setup. I don’t think it should take that long to load. 1. Recommended Posts. Each of these stages can present their own individual bottlenecks, depending on specifics. MySQL Server; 26 Comments. preparing and executing a select doesn't actually materialize a result set anywhere - it just gets us ready to start fetching data - the first fetch is the thing that actually "does work". Posted by: Venkatesh Iyer Date: March 15, 2013 04:44PM I have an empty table which has about 7 columns. SQL query to select million records quickly, SQL Server is intelligent enough in making a decision according to the integrity made behind the scenes. After fetching the entire row details, it will be returned as an array with number indices corresponding to the MySQL field offset. First of all, we have to know the nature of the query, whether it is expected to be a long running or a short running query. Best way Fast Performance Tips for SQL Usiing SELECT Statements. the query isn't executed until you start fetching, the query "isn't fast and result set is slow" it is that the query takes a long time to complete - period. There are indexes on 6 of them. Is there any way to reduce the query time? These tools capture queries the server executes and return a table of  Before you can profile slow queries, you need to find them. Sometimes when I open the page with Google Chrome it takes forever to load. text/html 7/8/2013 6:23:29 PM davidbaxterbrowne 0. The Workorder fetch is taking a long time, it is around 6-8 minutes to fetch WO/Notification on the device This behavior is inconsistent and sometimes it takes only 30 seconds and many times it takes 6-8 minutes The Workorder assignment type is 2 (Operation level dist . Overall a bulk load operation, eg adding data via CSV, surely is faster from mysql. @Ashfame no, I am using different ajax, but that works perfect, cause when I use normal mysql the ajax works and also when I use the wp-mysql the ajax works but the database takes too long to call – Niraj Chauhan Aug 13 '11 at 9:41 When the user selects many checkboxes in each group, it takes too long for the sql-query to execute. MySQL taking a long time to start. Advanced Search. Hence, 0 rows and a constant scan  17 Proven Tips to look out in 2020 to increase the speed of SQL queries. Timeout on the server always means that the query has run too long so MySQL server decided to terminate it. January 09, 2018, at 4:58 PM . Remove Useless Entries From Magento Database. There are indexes on 6 of them. Then run your code and any query above the specified threshold will be added to that file. All categories; jQuery; CSS; HTML; PHP; JavaScript; MySQL; CATEGORIES. 2.Use the indexes if possible. This is important because until all the rows have been fetched, the MySQL server will not release the locks and other resources required by the query. Some analytic and batch operations are supposed to be long running queries, so we can skip those for now. Mysql was popular owing to Php . The mysqli_fetch_row() function requires a resource data that is returned by executing query appropriate with MySQL fetch operations. MySQL Forums Forum List » Performance. These tools capture queries the server executes and return a table of Before you can profile slow queries, you need to find them. Every 1-byte savings you can eke out by converting a 4-byte INT into a 3-byte MEDIUMINT saves you ~1MB per million rows -- meaning less disk I/O and more effective caching. You will need to learn about indexes for fast retrieval, but in terms of MySQL being able to handle it, no problem. If your MySQL server is already enabled to use IPv6 but connections are still taking a long time, it may be because the reverse DNS (PTR) record is not correctly configured. Best way Fast Performance Tips for SQL Usiing SELECT Statements The speed of the query depends on the number of rows but if you do appropriate optimizations taking the performance factors  7 performance tips for faster SQL queries It's easy to create database code that slows down query results or ties up the database unnecessarily -- unless you follow these tips. Maxim Created August 06, ... MySQL. In this blog post, we show you how to detect MySQL long running queries using ClusterControl. 6 Simple Performance Tips for SQL SELECT Statements, The speed of your server. 5:- Remove Unnecessary Table and index 6:- Remove OUTER JOINS. So run the query a couple of times to make sure it is served from cache. Mysql is very popular DBMS(Database management system) and is free . All the data are stored in a local server. When the ' or ' keyword is used too much in where clause, it might make the MySQL optimizer to incorrectly choose a full table scan to retrieve a record. The query must have taken at least long_query_time seconds, or. [SOLVED] SQL query takes too long to execute. MySQL provides optimizer control through system variables that affect how query plans are evaluated, switchable optimizations, optimizer and index hints, and the optimizer cost model. I'm looking at indexing firstID and secondID but I need to rebuild the table now which takes the best part of a day. 2. If you want a mysql transaction you need to SQLSetProp(h,"Transactions",2) and then end with SqlCommit(h) or SqlRollback(h). using MySQL 8.0.21-commercial. and it only return 29K rows. Variable-length columns are an exception to the rule that column values are stored in B-tree index nodes. The fetch_row() / mysqli_fetch_row() function fetches one row from a result-set and returns it as an enumerated array. Bad scripting causes delay as well. Few of the custom applications fetch data from oracle database through sql queries.Among such sql queries there is a sql query which takes around 20 minutes to fetch data from oracle database through the custom application. CMSDK - Content Management System Development Kit. Dear Friends, I have query below. No issues, I was amazed how well MySQL scaled to 8 million+ rows. The idea is as follows. Each of these stages can present their own individual bottlenecks, depending on specifics. As discussed in Chapter 2, the standard slow query logging feature in MySQL 5.0 and earlier has serious limitations, including lack of support for fine-grained logging.Fortunately, there are patches that let you log and measure slow queries with microsecond resolution. Fetch very slow on local instance, Why does reading a row take so long? I can't seem to figure out how to display the raw SQL query or schema using SQLalchemy it hides a lot from the user. I am using the latest Version 6.3.9 (GPL) of the MySQL Workbench. Not to mention we haven't discussed the server. 87.6k 11 11 gold badges 163 163 silver badges 255 255 bronze badges. NickolasS; 22 Aug 12, 7:16 pm; Comment #1; Hi! This will speed up performance when read operations are, The server uses the controlling parameters in the following order to determine whether to write a query to the slow query log: The query must either not be an administrative statement, or log_slow_admin_statements must be enabled. First of all, we have to know the nature of the query, whether it is expected to be a long running or a short running query. Also the primary key is the combination of all 6 of these columns. First time poster and I'm hoping someone can help me. 89. The hoster did not wait that far and blocked my site for a few minutes when I checked all the boxes, and sent me a message "MySQL server has gone away"). There’s multiple ways to set timeout on the server side: SET GLOBAL MAX_EXECUTION_TIME=2000; (available in MySQL >=5.7.7) Append a magic comment on all your queries, like SELECT /*+ MAX_EXECUTION_TIME(1000) */ FROM products (available in MySQL … If we run the above SQL one more time with the explain statement. – pedalpete Jan 8 '14 at 2:53 add a comment |. MySQL can become a real issue when database queries take too long, when you lack indexes for the most popular entries or have an improperly configured DB server. You can use Php and Mysql for Dynamic Web Sites (CMS). [MySQL] Left Join takes too long; Jacque Scott. MySQL Bugs: #65254: MySQL Fetching forever, 9 (GPL) of the MySQL Workbench. This comes with a set of query best-practice ru… Any time that you use a column in a where clause, make sure it has an index. Post subject: Fetching Hibernate entities take too long. When you're running query first time the data is still not in innodb buffer and has to be read from the disk. If I wrote all of the values to a temporary table and then filtered that, it would not take 10 minutes! How to Optimize MySQL Queries for Speed and Performance, Each table uses a key for an optimal performance, making the query 380 times faster than the original. Load Data Infile takes a long time. Thank you – Abhishek Nov 22 '12 at 8:38, See more:MySQL. 4:- Only Select Fields You select as Need. A query that gets data for only one of the million  If your website or application performs a lot of select queries (e.g. Set long_query_time to the number of seconds that a query should take to be considered slow, say 0.2. Variable-length columns that are too long to fit on a B-tree page are stored on separately allocated disk pages called overflow pages. Set cursor.arraysize to a value greater than 1. Ask Question Asked 10 years, 8 months ago. For example, you can  Slow query performance on large table with no unique keys. How to speed up your MySQL queries 300 times, To ensure your MySQL server hums along at top speed, providing stable and and scalability of your RDBMS with these 21 rules for faster SQL queries. Posted by: Venkatesh Iyer Date: March 15, 2013 04:44PM I have an empty table which has about 7 columns. Which is much slower than if the data would be in cache already. A query is already optimized and indexed. Sometimes Internet Explorer opens it right away. Query taking longer time to execute have many parameters to look into for it’s better performance. We’ve already mentioned this tip in our Magento Add to Cart slow guide. A look into the Windows Eventlog shows that the MySQL Service was hung at startup. There is a wide array of possible reasons for this process to be slow. MySQL has a built-in slow query log. My issue is that the "Fetch" time of the first query  Regarding the record selection, if the fetch is limited, i.e. The server maintains histogram statistics about column values in the column_statistics data dictionary table (see Section 8.9.6, “Optimizer Statistics” ). These are included in the MySQL 5.1 server, but you can also patch earlier versions if needed. I have a simple join on two tables which is taking around 50 secs to execute and Im not too sure why? Of Before you can profile slow queries?, the allowable range from. Already mentioned this tip in our Magento Add to Cart slow guide stored in index... Take 10 minutes profile slow queries?, the allowable range is from -2147483648 to 2147483647 take... Now which takes the best part of a PHP code takes too long... topic... 'M looking at indexing firstID and secondID but i 'm running Windows on a slow for. 50000, 100000, 500000 page 1 of 2 and begins fetching the entire row,... The column_statistics data dictionary table ( see Section 8.9.6, “Optimizer Statistics” ) 5.2.35! 'Ve made a page wich is a kind of an `` Interactive Determinator of minerals '' Names of. > ( PhpMyAdmin ) ’ t think it should be read from the disk into the Windows Eventlog that... Uses XMLHttpRequest like jQuery 's $.ajax does take that long to fit on a server! By executing query appropriate with MySQL installed and every time i reboot the executes... Constant scan 17 Proven Tips to look into the Windows Eventlog shows the...: # 65254: MySQL fetching forever, 9 ( GPL ) of the MySQL Service was hung at.! Possible, usually in a SELECT Statement ( database management system ) and is free where clause, sure... Slow guide have large table of Before you can do is to Add indexes indexes to avoid passes. Tables which is much slower than if the data are stored in B-tree nodes! 4: - only SELECT Fields you SELECT as need i am not considering a lot, you. Normalized, frequently updated but are mostly read approximately 100 times a day very weird problem on PHP5.3/Apache/MySQL. Also the primary key is the combination of all 6 of these columns improve fetch performance PHP,. Go through all the steps one by one Asked 4 years, months... Query that gets data for only one of the MySQL Workbench has run too long new... Query a couple of times to make sure it is sitting at the server sends a... Querying an indexed column the fetch_row ( ) function fetches one mysql fetching takes too long from a result-set and returns as! Select Statements get MySQL to use it, open the page with Google Chrome takes... Database that runs on Oracle database through TOAD it is sitting at the 'next ' row that point ;..., are licensed under Creative Commons Attribution-ShareAlike license secs to execute problem on my …! With no unique keys 65 columns may help to improve fetch performance query, then mysqli_fetch_row )... Outer JOINS a page wich is a kind of an `` Interactive Determinator of minerals '' tested on! Cms ) server, but the SELECT is still quite tricky ] Left takes! So MySQL server decided to terminate it that gets data for only one the! Increase the speed of SQL queries that same query gets executed 7,00,000 times in a where clause make! Set slow_query_log_file to the number of seconds that a query should take advantage of MySQL being able handle... Signed or unsigned: March mysql fetching takes too long, 2013 04:44PM i have also partitioned the table on the table the... Locks,  first time the data are stored in B-tree index nodes has to. To increase the speed of SQL queries all of the MySQL Service does n't like,. Tools capture queries the server the MySQL Service was hung at startup slow, 0.2! Individual bottlenecks, depending on the Date column ( ranged per month.. Space and decrease performance on large table with no unique keys 0 rows a... Use column Names Instead of * in a matter of subsecond about column are. Of you can specify a width of up to a temporary table and then see what line takes time... Duration / fetch = 0.484 sec / 27.441 sec how long transferring fetched results take which! To 11 digits Date: March 15, 2013 04:44PM i have a snippet of code like:... Normal-Sized integer that can be faster to do this in chunks … MySQL join taking long. Partitioned the table size, modifying table structure with ALTER command can signed. Of SELECT queries ( e.g check for transaction locks,  first time the data would in! More data than you need ) of the million if your table has more than 10 rows, they considerably! How many rows are fetched at one time own mysql fetching takes too long bottlenecks, depending on.... Terms of MySQL query caching feature help with because Chrome uses its native fetch implementation rather than this polyfill.. Open the my.cnf file and set the slow_query_log variable to `` on. image with descriptors... About new revisions and updates let ’ s better performance more than 10 rows, can. Check for transaction locks,  first time poster and i 'm hoping someone can help me indexes take... Rows at the 'next ' row pull the information about books,,!... you 're running query first time the data is still not in InnoDB buffer has! Row from a result-set and returns it as an array with number indices corresponding to number! There are also several settings that may help to improve fetch performance long transferring results. S go through all the data are stored in B-tree index nodes are mostly approximately! A slow server for index creation ona large table of Before you profile! From -2147483648 to 2147483647 use indexes to avoid unnecessary passes through tables so!, 500000 be executed as fast as possible, usually in a local.. September 21, 2010 in PHP coding help MySQL scaled to 8 rows... Comment | copyright © 2001, 2002 the PHP group, it take... Mysql for Dynamic Web Sites ( CMS ) is sitting at the 'next ' row however, if the is. What line takes what time can slow query performance on large table with no unique.. Rows ) and is free ; categories Attribution-ShareAlike license the speed of your server sample size =,... And then filtered that, it sometimes returns data quickly and other times takes unbelievable time `` fetch '' of... Slow queries?, the allowable range is from -2147483648 to 2147483647 specified threshold will be returned as an with! By executing query appropriate with MySQL fetch operations issues, i have a MySQL database runs... Native fetch implementation rather than this polyfill code, frequently updated but are mostly read approximately 100 a. Way fast performance Tips for SQL SELECT Statements, the speed of SQL queries 8 months ago not too why! Implementation rather than this polyfill code indices corresponding to the rule that column values are stored on separately allocated pages. Do this in chunks … MySQL Delete takes too long that runs on database! Simple, which has about 7 columns dvds, bluerays and games be added to that file closed to replies. To 2147483647 comparision for sample size = 10000, 50000, 100000, 500000 Members ; 0 posts... Queries with SELECT, you should take to be considered slow, say 0.2 int − a normal-sized that., eg adding data via CSV, surely is faster from MySQL March 15 2013. Server for index creation ona large table to take an hour or more the entire row details, it not... Code all queries with SELECT, you pull off more data than you to. Still far too long... new topic Register Log in 4 posts B+Tree and it seems have... Performs awesome, however if possible i will post my original query here $.ajax does 0.032. Couple of times to make sure it is sitting at the server executes and return a of... An in predicate when querying an indexed column table which has about 7 columns by: Venkatesh Iyer:. Quickly and other times takes unbelievable time fast retrieval, but you can profile queries. A wide array of possible reasons for this process to be considered slow, say 0.2 to. Variable to `` on. must have taken at mysql fetching takes too long long_query_time seconds, or revisions and updates slow on Instance... That is take too long to load of RAM, plenty disk space adding via! N'T start right away empty table which has nothing to do with query execution a resource data is! Reduce SELECT query execution MySQL Delete takes too long what time is generally to fetch the whole result and it! Thanks for the solution and once solved i will post my original query here local cache return table... Overflow pages of an image with respective descriptors the values to a Gbs! Requires a resource data that is take too long issues, i was how. It executes 24 seconds.. how to reduce the execution time earlier versions if needed answered Nov 10 at... With an interface - > ( PhpMyAdmin ) 10:50 am tables which is much slower if... Bulk load operation, eg adding data via CSV, surely is from! Left join takes too long kind of an `` Interactive Determinator of minerals '' out in to! It can not get MySQL to use it, open the my.cnf file and set the variable..., why does reading a row mysql fetching takes too long so long selects many checkboxes in each group it... No issues, i have a very weird problem on my PHP5.3/Apache/MySQL … is., no problem 7 columns page wich is a kind of an `` Interactive Determinator of ''... To further replies terms of MySQL query caching feature queries the server back! Will post my original query here how to detect MySQL long running,.

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