MySQL: LOAD DATA reclaim disk space after delete

Posted by Michael on Stack Overflow See other posts from Stack Overflow or by Michael
Published on 2012-12-03T15:05:13Z Indexed on 2012/12/03 17:04 UTC
Read the original article Hit count: 164

Filed under:

mysql

|

delete

|

load-data-infile

I have a DB schema composed of MYISAM tables, i am interested to delete old records from time to time from some of the tables.

I know that delete does not reclaim the memory space, but as i found in a description of DELETE command, inserts may reuse the space deleted

In MyISAM tables, deleted rows are maintained in a linked list and subsequent INSERT operations reuse old row positions.

I am interested if LOAD DATA command also reuses the deleted space?

UPDATE

I am also interested how the index space reclaimed?

© Stack Overflow or respective owner

Related posts about mysql

How to remove MySQL completely with config and library files on ubuntu 12.04 gnome 3.0

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I tried everything till now: sudo apt-get remove mysql-server mysql-client mysql-common sudo apt-get purge mysql-server mysql-client mysql-common sudo apt-get autoremove and even more commands... But whenever I am trying to locate mysql. I get a no. of files related to mysql command: shell>>… >>> More
mysql: Cannot load from mysql.proc. The table is probably corrupted

as seen on Server Fault - Search for 'Server Fault'
Mysql was started: /usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700 but when I'm trying to do something: ERROR 1548 (HY000) at line 1: Cannot… >>> More
Why is there a /etc/init.d/mysql file on this Slackware machine? How could it have gotten there?

as seen on Server Fault - Search for 'Server Fault'
A client of my IT-consulting service owns a web-development shop. He's been having problems with a Slackware 12.0 server running MySQL 5.0.67. The machine was set up by the client's sysadmin, who left on bad terms. My client no longer employs a sysadmin. As far as I can tell, the only copy of MySQL… >>> More
mysql: Bind on unix socket: Permission denied

as seen on Server Fault - Search for 'Server Fault'
Can't start mysql with: sudo /usr/bin/mysqld_safe --datadir=/srv/mysql/myDB --log-error=/srv/mysql/logs/mysqld-myDB.log --pid-file=/srv/mysql/pids/mysqld-myDB.pid --user=mysql --socket=/srv/mysql/sockets/mysql-myDB.sock --port=3700 120222 13:40:48 mysqld_safe Starting mysqld daemon with databases… >>> More
MySQL – Learning MySQL Online in 6 Hours – MySQL Fundamentals in 320 Minutes

as seen on SQL Authority - Search for 'SQL Authority'
MySQL is one of the most popular database language and I have been recently working with it a lot. Data have no barrier and every database have their own place. I have been working with MySQL for quite a while and just like SQL Server, I often find lots of people asking me if I have a tutorial which… >>> More

Related posts about delete

?????create or replace???PL/SQL??

as seen on Oracle Blogs - Search for 'Oracle Blogs'
????T.Askmaclean.com?????10gR2??????procedure,?????????create or replace ??????????????????,????Oracle???????????????????procedure? ??Maclean ??2?10gR2???????????PL/SQL?????: ??1: ??Flashback Query ????,?????????????flashback database,??????????create or replace???SQL??source$????… >>> More
new[n] and delete every location with delete instead the whole chunk with delete[]

as seen on Stack Overflow - Search for 'Stack Overflow'
Is this valid C++ (e.g. not invoking UB) and does it achieve what I want without leaking memory? valgrinds complains about mismatching free and delete but says "no leaks are possible" in the end. int main() { int* a = new int[5]; for(int i = 0; i < 5; ++i) a[i] = i; for(int i = 0;… >>> More
flex combobox backspace or delete key does not delete highlighted text

as seen on Stack Overflow - Search for 'Stack Overflow'
Context: I am implementing a flex auto-suggest combobox - as the user types in each character: Consider the string 'Stackoverflow' and user input = 'st' 1) the data provider is filtered to show all items starting with 'st' 2) text is set to auto-suggest string such that the un-typed part is highlighted… >>> More
My delete function does not delete the targeted file

as seen on Stack Overflow - Search for 'Stack Overflow'
Basically I could upload files based on a project. Whenever I create a project, a new directory is created with the directory name as the project_name e.g. this is a test - this-is-a-test. But my problem is I couldn't delete a file in a directory. function delete_image($id) { $this->load->model(array('work_model'… >>> More
Delete a div id using ajax and jquery and delete from DB

as seen on Stack Overflow - Search for 'Stack Overflow'
I've got several div id's, each containing a different client. I want to be able to click the delete button and using ajax and jquery delete the specific div from the database. I'm getting success in AJAX but it's not deleting anything from the DB. And then obviously, upon deletion, I would like… >>> More