PR
Hello! I'll be gratefull if you'll place our news on your page. Best Regards, Sergey Lazurenko dotConnects 6.00.odt Description: application/vnd.oasis.opendocument.text -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
MySQL Parallel Inserts
Greetings everyone. I am in a situation where I need to do parallel inserts into MySQL database from inside my Perl program. Basically, I have several million records to insert into the database, and hence I would rather do them in parallel than doing them one at a time. I looked around but did not find any information on doing this. Does MySQL not support parallel reads/writes? Thanks in advance. Andy
Re: MySQL Parallel Inserts
On 12/13/2010 21:32, Andy wrote: Greetings everyone. I am in a situation where I need to do parallel inserts into MySQL database from inside my Perl program. Basically, I have several million records to insert into the database, and hence I would rather do them in parallel than doing them one at a time. I looked around but did not find any information on doing this. Does MySQL not support parallel reads/writes? Thanks in advance. Andy Actually, you would be better off using the LOAD DATA INFILE... command for your bulk loading needs. The more contention you create for the same data and the more times you force an index rebuild, the slower it will move. Single-threaded, bulk loading is what works best for MySQL. Some light reading to help you along: http://dev.mysql.com/doc/refman/5.1/en/load-data.html http://dev.mysql.com/doc/refman/5.1/en/non-select-optimization.html http://dev.mysql.com/doc/refman/5.1/en/csv-storage-engine.html -- Shawn Green MySQL Principal Technical Support Engineer Oracle USA, Inc. Office: Blountville, TN -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Database procedures
HI All I am hoping that someone with more experience than me can assist here. I am trying to find out how to write a database procedure within MySQL, however I have never worked with procedures in my life and the resources I found on the net thus far seems greek to me... What we are trying to achieve is the following: There are currently 2 specific tables which contains archived data which are being deleted manually each day. We would like to put the delete of the data within a procedure and then have an automated process to execute the procedure. What we are using currently is the following: 1. = select max(id) from table_1 where utc Date; 2. delete from table_2 where id ; 3. delete from table_1 where id ; basically we currently delete everything older than the start of yesterday but this might be changin at some point to be done hourly as the system grows. Does anybody have a good resource which explains exactly how I would be able to create this procedure or can otherwise assist or guide me? I would really appreciate the help as I would love to learn how to write procedures. Regards Machiel
