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From:Larry Martell Date:July 3 2013 7:31pm
Subject:Re: 1 file
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On Wed, Jul 3, 2013 at 12:36 PM, Rick James <rjames@stripped> wrote:
> I once found a slowlog called simply "1".  But I did not track down the cause. 
> Possibly it was a not-so-correct configuration script.
>
> SHOW VARIABLES LIKE '%dir%';
>

Nothing was set to 1


> ibdata1 grows (never shrinks) when data is added, ALTER is done, etc.  It will reuse
> free space within itself.
>
> innodb_file_per_table=1 is recommended
>
> Having an explicit PRIMARY KEY on InnoDB tables is recommended.  (MEMORY did not care
> much.)
>
>> -----Original Message-----
>> From: Larry Martell [mailto:larry.martell@stripped]
>> Sent: Wednesday, July 03, 2013 9:29 AM
>> To: shawn green
>> Cc: mysql@stripped
>> Subject: Re: 1 file
>>
>> On Wed, Jul 3, 2013 at 9:51 AM, shawn green <shawn.l.green@stripped>
>> wrote:
>> > Hello Larry,
>> >
>> >
>> > On 7/3/2013 11:27 AM, Larry Martell wrote:
>> >>
>> >> We recently changed from in memory files to InnoDB files. Today we
>> >> noticed that in every server's data dir there is file called '1' that
>> >> seems to get updated every time the iddata1 file gets updated. On
>> >> some servers it's comparable in size to the iddata1 file, on other
>> >> servers it's 10-15x larger, and on others it's 1/2 the size. What is
>> >> this file. Googling revealed nothing about this.
>> >>
>> >
>> > That is not something an official MySQL build would do. Consult with
>> > the person (or group) that compiled your binaries.
>> >
>> > Now, if you have enabled --innodb-file-per-table and if you have named
>> > your table '1' then that file is probably '1.ibd'.  That would be
>> > expected. But that seems unlikely based on your other details.
>> >
>> > Did you also enable a separate undo log, perhaps? Although if you had,
>> > it should be 'undo1' not just '1'
>> > http://dev.mysql.com/doc/refman/5.6/en/innodb-parameters.html#sysvar_i
>> > nnodb_undo_tablespaces
>> >
>> > So, that simple '1' file also seems unusual to me.
>>
>> Thanks for the reply.
>>
>> I asked our DBA group and here's the answer I got:
>>
>> The file is currently accessed by mysqld, please don’t delete it.
>> Looking at the file header, it appeared to be an innodb datafile.
>> But no idea how it was created.
>>
>> Sigh.
>>
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Thread
1 fileLarry Martell3 Jul
  • Re: 1 fileshawn green3 Jul
    • Re: 1 fileLarry Martell3 Jul
      • RE: 1 fileTimothy R Peterson3 Jul
        • Re: 1 fileLarry Martell3 Jul
      • RE: 1 fileRick James3 Jul
        • Re: 1 fileLarry Martell3 Jul
    • 答复: 1 file李炜(平安科技数据库技术支持部)4 Jul