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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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Related Forum Messages:
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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Query Execution Time
I m using inner join where there is no keys (Primary and foreign). I want to know that Does key affects execution times?

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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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How To Get A Query Execution Time?
How to get a query execution time?

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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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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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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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Query Total Execution Time
How to get total time taken by a query to execute....

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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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What Is Execution Time Of A Query Based On? (was "a Mysql Question")
when selecting data from the database, does the time taken to retrieve it vary from 56k connections to T3 connections? or does it all depends ont he general server speed/amount of connections on the db?

im not sure if ive explained that in the best way for people to understand
but im sure someone will get what i mean

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Size Of Data Type 'Time'
I want to store time of the order of 3000 hours. But MySql is only supporting arount 831 hours or 30days.

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Does Mysql Store Max Size For Data Type Each Time, Or Only What Is Needed For Specific Data?
If I use MEDIUMTEXT, which (if I understand correctly) has a max size of 65k, does mysql use the entire size each time data is written to that column? I have a text field on my site that users fill in, but more often that not, they don't. However, when they do, it can be 1000 bytes or more. Am I wasting space using MEDIUMTEXT or does mysql only set aside 1000 bytes for that column if the data is only 1000 bytes?

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Right Database Size?
Is 25mb (database) enough to handle 1.2 million records in one single table with 7 columns. What is the right Size of the database in order to handler that much records/rows?

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Max Size Of A Database?
What is the maximum size of a single database file in mysql? What is the maximum number of record can i have in a single database? what is max number of field can i have in a single record. Which is the best version of mysql 4 or 5?

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Database File Size
I running MySQL locally and have the following dir setup

C:wampmysqldatamike - This is where the tables for the database
mike are stored

C:wampmysqldata - This is where I think the database data is stored.

Basically the file in the data dir. (ibdata1) is 10,240kb in size.
When I update a table in the mike database the file size of ibdata1
doesn't increase and I don't know why?

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Database Size With SQL Command Only
I would like to know the database size. I know that we can use "show table status" but I don't know how can i use it in SQL language with the command prompt with Mysql.exe.

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Estimate Database Size
I want to estimate approximately the total size of a database but I don't know how can I calculate the size of an index or a primary key, because I don't know their size. For example, if I had this table:

CREATE TABLE example (
id INTEGER UNSIGNED NOT NULL AUTO_INCREMENT,
idother INTEGER NOT NULL DEFAULT 0,
name VARCHAR(128) NOT NULL,
PRIMARY KEY(id),
INDEX relation(id,name)
) TYPE=InnoDB;

I suppose that the total size of this table would be:
SIZE= 2* (integer size) + 128 * (varchar size) + (primary key size) + (index size)
= 8 bytes + 128 bytes + ???

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Restrict Database Size
Is there any way to restrict the maximum size of a database in mysql. I'm using mysql version 4.1.7.

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How To Know The Size Of The Database Used Using Phpmyadmin And MS-DOS??
how to know the size of the Database used using phpmyadmin and MS-DOS?

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Mysql Database Latent Size
We tried 2 techniques to mesure db size and both fails to return
realtime size.

a) under innodb, we ’show variables’, find the innodb_data_file_path
variable and parse the size (works only if not autoextend) and we
substract the ’InnoDB free: ??? kB’ from the Comment field of ’show
table status’.

b) for all monitored tables, we figure:

indexFree = indexLength/dataLength * dataFree

and we sum up:

dataLength-dataFree + indexLength-indexFree

In both case the size is fair, although not perfectly equal (method A
reports bigger size), but the growth is comparable.

The problem lies in the accuracy of that info. We do bulky deletes,
removing 10 to 40% of rows in many tables.

First bug, the size of the DB is not quickly following the ’delete’
statements (it may decay for 20-40 minutes after the statements
completed!!).

Second bug, the DB size is not changing for 1-2 hours even though we
inserts a lot.

(We are talking about a few 10 millions rows tables in a 40 gigs
InnoDB space, getting ~500 inserts/s, ~2000-5000 deletes/s)

How can one mesure the DB size more in real-time, and avoid/account
the latent period where growth seams abscent?

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Finding Table And Database Size
A couple questions about finding the disk space used by a =
table/database:

1) First how can I get the size a table is taking up on disk?
Is it the 'Data_length' field in: SHOW TABLE STATUS FROM db_name LIKE =
'wild';??
If so how can I do a query like the one above and just get Data_length =
returned?
Otherwise what query can I do to find the disk size of a table?
2) Is there a simple query to get the disk size of a database and all of =
it's tables? Or do I need to do the method I use in question one on each =
table in the db and add them up?

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Trimming InnoDB Database Size
I'm using InnoDB with Mysql and I've used delete to delete over 10
million records, but the InnoDB database is still the same size on the
disk (over 100 gigs) is there a way to get Mysql/InnoDB to shrink or
trim this size?

and also, can I set a maximum size and make it so itll rotate itself,
as in purge out old entries as new ones come in when it hits the
maximum?

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Database Size To Speed Up Queries
I have a database with a millions of records.The main table has 2 varchars (200), 7 Integers and a date field. Queries are done on 1 of the varchar fields. How do I speed up queries?

Indexing the varchar fields?

Are there any performance tuning tutorials?

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Database Total Size In Bytes
I am using PHP/MySQL and I am wondering what type of query would I have to do to get the total size of the database in bytes... So this would include all the content. The reason is because I am trying to limit users to uploading files if they are over their max allowance.so I need to run a check.

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Reducing Mysql Database Size
I run 4 forums and have 4 mysql databases of 100mb limit each.

It has come to my attention today that 1 of my forums had increased to 110mb in size, so I deleted a section of my forum which has 18,000 posts in which reduced the mysql database down to 85mb.

In contrast one of my other forums has twice as many posts yet is only 50mb in file size so I cannot understand why this forum which has less data has a mysql database of 85mb ?

I have checked all files and optimised the database and this has only brought things down from 110mb to 81mb.

What I do not understand is, is how come I already have a forum which is identical and has more posts yet is much less in database size, and how can I now go about reducing this one which is dangerously close to its limit.

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Mysql 4.x DATABASE Size Estimate
If i had a php forum that used mysql 4.x and I had 145forum posts with 500characters and a 450KB image in EACH and every post.

how many Megabytes would this take up in the MYSQL database Approximately?, because I know mysql database compresses the images and forum posts etc.I need to know this so I can decide what size HARD DRIVE to get for my server.

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Limit The Size Of A Users Database
How do you limit the size of a database?

If I wish to limit the size of a users database so it can't go past 30mb so he/she as to request a increase in size . How do I acheive this??

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Database Size Not Decreasing After Delete Of Records
I have tried deleting hundreds of records from several tables in my MySQL database and I have found that although the number of records in these tables has decreased, the size in Mb has remained the same.

I checked the data directory and the .MYI files seem to have been amended but the .MYD files have remained the same size.

Is the data still there? I really want to remove it both for security and to keep file sizes down.

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Maximum Size Limit Of MySQL Database?
What is really the maximum size limit of MySQL database? If we are designing a specific program that is projected to last for a longer period of time, and we will be using MYSQL database, we often ask our mind, how long will it stands to hold millions of records.

Got any brilliant ideas or tips, wherein we can maintain mysql performance and even the records go heavy, it can still perform its best.

Can it hold millions of records? what should be done inorder not to make it crawl after 2 or 3 more years?

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Maximum Database Size Of Community Edition
What is the maximum supported database size of MySQL 5.1 community edition?

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Function To Return The Size Of A Database And/or Table
I would like to know if there's any function to return the size of the database or table... I have a PHP script and I would like to display the actual size of my database.

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How Big ( Disk Size ) Would This Database Be: 4.2 Billion Rows
I have a database in MySQL version 5.0.19 that I'm making. Its structure is:

CREATE TABLE `big` (
`keyval` int(10) unsigned zerofill NOT NULL,
`name` varchar(20) default NULL,
`avail` enum('y','n') default NULL,
PRIMARY KEY (`keyval`),
KEY `keyval` (`keyval`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
The 'keyval' will be filled with every value from 00000000 to 4294967295 ( 4.3 billion rows ), and assume worse case of 20 characters in each 'name' element and 'y' or 'n' always set in the 'avail' colmn.

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Disk Size Of Tables[or Database] In Mysql Or Oracle
how can i know disk memory occupied by database[tables] in mysql or oracle.

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Exporting Database With Putty & PHPMyAdmin File Size Question?
I have finally worked out how to back up the database using Putty. I just need a couple of questions answering as I am a bit baffled.

When I use Putty to export my database the database size comes out as 55MB
When I use PHPMyAdmin to export my database the database size comes out 89MB

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Size Of Indexes Versus Data File Size
I am adding indexes to a table with about 200,000 records. Every field indexed adds about 2MB to the index file (*.MYI).

The index file is around 8MB and the data file is around 10MB.

Is there some optimum ratio I need to know about?

(I have examined the queries and am indexing field used in WHERE, ORDER BY and GROUP BY clauses.)

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Adding Different Size And Price Options To An Online Store Database Structure
At the moment I have an online store all up and running that sells oriental rugs, but based on the assumption that each design is available at a single size and a single cost.

The site has an admin section where the site owner can add new designs using a fairly simple insert form, filling in various details including size and cost, which adds a new record in a simple 'Carpets' table.

What would be the best practice to add in the ability to specify different sizes, with different prices? I'm presuming I'm going to need at least one new table, ie split it out into Carpets and Carpet_Sizes perhaps?

Carpets
Carpet_ID
Design_Ref
etc

Sizes
Carpet_ID
Size
Price

With a query Carpet_Sizes :

Carpet_ID, Design_Ref, Size, Price
1, ABC1, 6x4, 599
1, ABC1, 2x3, 199
1, ABC1, 5x4, 399
2, ABC2, 6x4, 899
2, ABC2, 2x3, 599
3, ABC3, 5x4, 799
3, ABC3, 6x8, 999

What would be the easist way to allow the owner to add this info when adding new designs? Using checkboxes perhaps?

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Time Table In Database
is it possible to insert the time table in database?

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How Much Time For Copying A 1 GB Database ?
Can someone give me an estimation on how much time is need to clone/duplicate a MySQL database with 1 GB size 20 tables and each 2 foreign keys?

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Time Required By Database
Is there a way for me to print out the sum of all the time required by the mysql database? In most cases, I connect to the database once on a page view and then utilize multiple select, insert, etc. statements before disconnecting.

Before disconnecting, can I select the total time required by the database (and not perl) in that session? Even getting the time required by one select statement would be useful, too.

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Table And/or Database Creation Time
Is there such thing as a table or database creation time in the SQL
standard, that you could avail yourself of?

I mean do databases keep this info. I think they do since they are
like little OSs and many of them have internal back up features, that
must use some kind of timing.

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Last Time A Mysql Database Updated
Here is my problem, my company has been storing fedex data in a access '97 database (the data is imported into this access database via a program called DirectLink), and because we are mainly a php house and we use mySQL, we need to take that information from the access database and mirror it in the mySQL database. To top things off I have to use ASP to write this code to do this.

Now for the Access database I can use a FSO to find out the last time the database was updated. I've had no problem with that. And I've had no problem mirroring the information across to the mySQL database. My problem is, is there a way using the FSO to find out the last time the mySQL database was update. Since mySQL creates several different files for the different databases it holds - is there a specific file I need to look for or is there a query I can run that will tell me?

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Storing Dates And Time To Database
I was wondering how to store this date into the database:

Friday, August 28, 2015

and this time:

8:00PM

I have one field that collects the date and another for the time.. Im looking to store them in this format, 0000-00-00 00:00:00.. Is there some way to turn this date "Friday, August 28, 2015" into this "0000-00-00 00:00:00" so it will be inserted into the database using DATETIME??

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Time Series Database Design Question
1) I have a data set that contains approximately 5000 time series sampled daily over multiple decades.

2) All of my queries will be of the form: retrieve some subset of the 5000 time series over some subset of the available dates. Both subsets will be determined by data in other external mysql tables.

3) When I retrieve these subsets from the database I want to be able to quickly load the result into a matrix (that will be imported to matlab) of size num_days by num_series, where the data from each series is aligned by date and in chronological order.


Any ideas on how to best implement this requirement in mysql? Ideally each series would be a column and therefore already aligned, but that would be too many columns for mysql to handle.

Is there a possibly a solution where I have 2 columns, date and time series values. And the query reshapes the result to my required array structure?

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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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