Re: Perf regression in 2.6.32 (Ubuntu 10.04 LTS)

On 28/09/10 16:59, Robert Haas wrote: <blockquote
cite="mid:AANLkTikTnZrzumZYShTO_o7Vy8UpLucJ=7nWZTNfdL6X@mail.gmail.com"type="cite"><pre wrap="">On Mon, Sep 27, 2010 at
11:37PM, Mark Kirkwood
 
<a class="moz-txt-link-rfc2396E" href="mailto:mark.kirkwood@catalyst.net.nz"><mark.kirkwood@catalyst.net.nz></a>
wrote:</pre><blockquote type="cite"><pre wrap="">Greg, have you run into any other evidence suggesting a problem with
2.6.32?

Not Greg (sorry), but this might be worth a look:

<a class="moz-txt-link-freetext"
href="http://www.spinics.net/lists/linux-ext4/msg20299.html">http://www.spinics.net/lists/linux-ext4/msg20299.html</a>
</pre></blockquote><prewrap="">
 
Oh, interesting.  But why wouldn't that also affect MySQL?
 </pre></blockquote><font size="-1"><font face="Helvetica"><br /> Yeah, wondered that myself - perhaps if sysbench is
usingmyisam tables then there is probably no fsync activity at all for a read only workload. Be interesting to see if
Mysqlsuffers a hit for sysbench configured to use innodb storage...<br /></font></font>