RE: Binlog errors

Ext3 fs on an emc SAN. Rhel 4 box with 4 cpus and tons of memory. I have no problems with other types of files- only binlogs. I am using mostly innodb tables.

It is a high load server but that's no excuse to corrupt all the binlogs

John Mancuso
Linux Administrator/MySQL DBA
IT Infrastructure
American Home Mortgage
w: 631-622-6382
c: 516-652-2475

-----Original Message-----
From: Michael Dykman [mailto:mdykman@gmail.com] Sent: Wednesday, June 27, 2007 11:33 AM
To: John Mancuso
Subject: Re: Binlog errors

Not that any ideas are jumping out at me but what file system are you employing here? and what types of MySQL tables are you using? I note from the listing above that you seem to be taking extremely high volumn (>1G in barely over 3 hours on a couple occasions). It seems a bit spooky to me that the majority of your logs are capped at a level just over 1 Gig (2^30 = 1073741824).

MyISAM has been known to spontaneously corrupt it's data files under extremely high load although I have not heard of this happening at the binlog level.

• michael dykman

On 6/27/07, John Mancuso <John.Mancuso@americanhm.com> wrote:
> This seems to be a frequent occurrence:
>
> [root@mexxxx01 dblog]# mysqlbinlog mysql.000025
> /*!40019 SET @@session.max_insert_delayed_threads=0*/;
> ERROR: Error in Log_event::read_log_event(): 'Found invalid event in
> binary log', data_len: 94, event_type: 15 Could not read entry at
> offset 4:Error in log format or read error
>
> This is happening to all my binlogs (other servers as well) all the
> time. There is nothing wrong with the drive- I have other data on
> there that never gets corrupted.
>
> [root@mexxxx01 dblog]# ll
> total 4676748
> drwx------ 2 mysql mysql 16384 May 29 11:50 lost+found
> -rw-rw---- 1 mysql mysql 1073746319 Jun 24 00:43 mysql.000020
> -rw-rw---- 1 mysql mysql 1073784914 Jun 24 03:50 mysql.000021
> -rw-rw---- 1 mysql mysql 1073754672 Jun 24 06:57 mysql.000022
> -rw-rw---- 1 mysql mysql 1073743683 Jun 26 10:24 mysql.000023
> -rw-rw---- 1 mysql mysql 111863423 Jun 26 11:41 mysql.000024
> -rw-rw---- 1 mysql mysql 377289867 Jun 27 10:53 mysql.000025
> -rw-rw---- 1 mysql mysql 120 Jun 26 23:00 mysql.index
> -rw-rw---- 1 mysql mysql 12418 Jun 26 23:47 mysql-slow.log
> -rw-rw---- 1 mysql mysql 117 Jun 13 17:08 relay.000001
> -rw-rw---- 1 mysql mysql 20 Jun 13 17:08 relay.index
> -rw-r--r-- 1 root root 55 Jun 27 10:53 test.txt
>
>
> What is going on here?
>
> John Mancuso
> Linux Administrator/MySQL DBA
> IT Infrastructure
> American Home Mortgage
> w: 631-622-6382
> c: 516-652-2475
>
>

--
 - michael dykman
 - mdykman@gmail.com

 - All models are wrong.  Some models are useful.

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