Re: Data corruption on deletes

Jim Nachlin Fri, 09 Jul 2004 08:50:32 -0700

gerald_clark wrote:

Hardware?

Celeron 1.3Ghz, IDE drive, 512Mb RAM

OS and version?

GNU/Linux, 2.4.20-8 kernel

MySql version?

4.0.17

Size of data file?
Size of index file?

postsearch.frm 8.7K
postsearch.MYD 3.5G
postsearch.MYI 1.0G
postsearch.TMD 3.5G

Filesystem type?

ext3


  Sorry 'bout that!

Also, in the time since posting the question below, I tried the
operation again (after repairing things), but I did a ALTER TABLE ___
DISABLE KEYS before and an ENABLE KEYS after.  This did not work, as
although the DB seemed to be working afterwards,

mysql> describe  postsearch;
ERROR 1016: Can't open file: 'postsearch.MYI'. (errno: 144)

So now I am repairing again.


  Thanks for your interest,
   Jim

I have a table with several keys. When I try to delete anything from this table, I get data corruption and have to repair it with myisamchk. Selects, updates work fine.


Here's the create table statement:

CREATE TABLE `postsearch` (
  `postId` int(11) NOT NULL default '0',
  `weblogId` int(11) NOT NULL default '0',
  `url` varchar(200) NOT NULL default '',
  `plink` varchar(200) NOT NULL default '',
  `image` varchar(100) default NULL,
  `language` varchar(100) default NULL,
  `title` varchar(100) default NULL,
  `weblogTitle` varchar(100) default NULL,
  `dateCreated` datetime NOT NULL default '0000-00-00 00:00:00',
  `post` text,
  `excerpt` text,
  `parserVersion` varchar(255) default NULL,
  PRIMARY KEY  (`postId`),
  KEY `weblog_key` (`weblogId`,`dateCreated`),
  KEY `url_key` (`url`),
  KEY `plink_key` (`plink`),
  FULLTEXT KEY `excerpt` (`excerpt`)
) TYPE=MyISAM


I think I have to somehow disable the keys, but am not sure quite how.

Here's what happens when I try to delete:

mysql> select postId from postsearch where dateCreated < NOW() - INTERVAL 14 DAY limit 1; +--------+ | postId | +--------+ | 65031 | +--------+ 1 row in set (0.10 sec)

mysql> delete from postsearch where postId=65031 limit 1;
ERROR 1034: Incorrect key file for table: 'postsearch'. Try to repair it

Anybody have any idea?

Jim


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