List:General Discussion« Previous MessageNext Message »
From:Paul DuBois Date:December 15 2011 6:48pm
Subject:Re: 'myisam_use_mmap' unstable like hell
View as plain text  
On Dec 15, 2011, at 12:02 PM, Reindl Harald wrote:

> this is NOT a memory issue
> 
> 'myisam_use_mmap' in mysqld is buggy since a long time
> http://bugs.mysql.com/bug.php?id=48726

This is fixed in 5.1.61, 5.5.20, 5.6.5:

http://dev.mysql.com/doc/refman/5.6/en/news-5-6-5.html


> we are speaking of a HP ProLiant DL 380G7 in a VMware-Cluster
> with 36 GB ECC-RAM while there are machines using InnoDB
> with 'large-pages' and some GB buffer_pool_size on the same
> host and not about some customer hardware
> 
> Am 15.12.2011 18:22, schrieb Andrés Tello:
>> When I had memory issues, with something relatively stable, mostly is due
>> faulty ram...
>> 
>> Can you use or less ram or change fisically the ram?
>> 
>> On Thu, Dec 15, 2011 at 2:23 AM, Reindl Harald
> <h.reindl@stripped>wrote:
>> 
>>> Am 15.12.2011 08:47, schrieb Rob Wultsch:
>>>> To be brutally honest, if you want stability you should
>>>> not be using MyISAM
>>> 
>>> this is bullshit
>>> 
>>> without 'myisam_use_mmap' i never saw mysqld crashing
>>> in the past 10 years, independent of the storage engine
>>> 
>>>> much less a not particularly commonly used feature.
>>> 
>>> mmap is not rocket science, so i do not understnd why this
>>> is not properly debugged and DEFAULT on
> 

-- 
Paul DuBois
Oracle Corporation / MySQL Documentation Team
Madison, Wisconsin, USA
www.mysql.com

Thread
'myisam_use_mmap' unstable like hellReindl Harald24 Nov
  • Fwd: 'myisam_use_mmap' unstable like hellReindl Harald24 Nov
    • Re: 'myisam_use_mmap' unstable like hellRob Wultsch15 Dec
      • Re: 'myisam_use_mmap' unstable like hellReindl Harald15 Dec
        • Re: 'myisam_use_mmap' unstable like hellAndrĂ©s Tello15 Dec
          • Re: 'myisam_use_mmap' unstable like hellReindl Harald15 Dec
            • Re: 'myisam_use_mmap' unstable like hellPaul DuBois15 Dec
              • Re: 'myisam_use_mmap' unstable like hellReindl Harald15 Dec