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From:Adarsh Sharma Date:November 4 2011 7:22am
Subject:Deleting Records in Big tables
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Dear all,

Today I need to delete some records in > 70 GB tables.
I have 4 tables in mysql database.

my delete command is :-

delete from metadata where id>2474;

but it takes hours to complete.

One of my table structure is as :-

CREATE TABLE `metadata` (
  `meta_id` bigint(20) NOT NULL AUTO_INCREMENT,
  `id` bigint(20) DEFAULT NULL,
  `url` varchar(800) DEFAULT NULL,
  `meta_field` varchar(200) DEFAULT NULL,
  `meta_value` varchar(2000) DEFAULT NULL,
  `dt_stamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`meta_id`)
) ENGINE=InnoDB AUTO_INCREMENT=388780373 ;


Please let me know any quickest way to do this.
I tried to create indexes in these tables on id, but this too takes time.



Thanks
Thread
Deleting Records in Big tablesAdarsh Sharma4 Nov
  • Re: Deleting Records in Big tablesAnanda Kumar4 Nov
    • Re: Deleting Records in Big tablesAdarsh Sharma4 Nov
      • Re: Deleting Records in Big tablesAndy Wallace4 Nov
        • Re: Deleting Records in Big tablesDerek Downey4 Nov
          • Re: Deleting Records in Big tablesAndy Wallace4 Nov
  • Re: Deleting Records in Big tablesReindl Harald4 Nov
    • Re: Deleting Records in Big tablesAnanda Kumar4 Nov
      • Re: Deleting Records in Big tablesReindl Harald4 Nov
    • Re: Deleting Records in Big tablesJohan De Meersman4 Nov
  • Re: Deleting Records in Big tablesmos9 Nov
    • Re: Deleting Records in Big tablesJohan De Meersman10 Nov