[svn.haxx.se] · SVN Dev · SVN Users · SVN Org · TSVN Dev · TSVN Users · Subclipse Dev · Subclipse Users · this month's index

Re: Last-Modified HTTP header in GET responses

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Mon, 04 Jan 2016 16:20:47 +0000

Stefan Fuhrmann <eqfox_at_web.de> writes:

> On 04.01.2016 14:25, Philip Martin wrote:
>> - The number of system calls made by Apache goes down
>>
>> 68822 to 50664 for hot FSFS cache
>
> Do you have quick way to find out which files
> we are reading in that case? My guess would
> be a fair bit of revprops during the report
> phase but for the GETs, its less obvious.

The patch causes GET responses to stop reading svn:date from disk so
that saves 8 system calls per request: open/fstat/read/close on the
revprop manifest followed by open/fstat/read/close on the pack file.
There are 2232 GET requests in the checkout so that accounts for
pratically all the difference.

-- 
Philip Martin
WANdisco
Received on 2016-01-04 17:20:54 CET

This is an archived mail posted to the Subversion Dev mailing list.