Re: [Monotone-devel] monotone serve thrashing

[Matt Johnston]

On Thu, May 19, 2005 at 10:35:49PM -0500, Glen Ditchfield wrote:
> I have monotone 0.19, compiled on SuSE 9.2 from the source rpm.  I used  
> monotone serve to serve a 250MB database, and synced with a brand new empty 
> database.
> 
> The server has only 196 MB of real memory, so I wasn't expecting 
> instantaneous 
> response, and I walked away.  When I came back 9 hours later, the top command 
> said that the monotone serve process had consumed 43 minutes of CPU, but had 
> caused 1.9 million page faults.  Virtual image size was 251 MB, and resident 
> set size was 152 MB.  The syncing process on the other computer had received 
> 6.7 MB in.
> 
> I gave up and copied the database to the other server.  Since then I have 
> synced the two a few times.  The amount of data transfered was never large, 
> and the commands completed in seconds -- typing in my pass phrase is the 
> longest part of the process.

What sort of distribution of file sizes does the database
have? (and also how many revisions/files etc?)  Currently
files are often loaded into memory multiple times, which is
problematic for large files. (This is just a vague guess,
it's likely that it might be something else such as buffer
resizing that's causing problems).

Matt