| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Aidan Van Dyk <aidan(at)highrise(dot)ca> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: mosbench revisited |
| Date: | 2011-08-04 22:22:07 |
| Message-ID: | CA+TgmoYYzv1xxCfhtWYcuuMLitmVRZ58-Zhy0NtrcEY0k+oq+A@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Aug 4, 2011 at 5:09 PM, Aidan Van Dyk <aidan(at)highrise(dot)ca> wrote:
> On Wed, Aug 3, 2011 at 5:04 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
>> And hoping that the Linux guys decide to do something about it.
>> This isn't really our bug - lseek is quite cheap in the uncontended
>> case.
>
> Has anyone tried this on a recent kernel (i.e. 2.6.39 or later), where
> they've finally remove the BKL out of VFS/inode?
>
> I mean, complaining about scalability in linux 2.6.18 is like
> complaining about scalability in postgresql 8.2 ;-)
Hmm. This machine is running 2.6.32-131.6.1.el6.x86_64, not 2.6.18.
Not sure how much the code has changed since then, but the spinlock is
there in the master branch of Linus's repository.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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