Push from development6 into 1.9-rich-root over smart server is very slow

[Jelmer Vernooij]

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  affects bzr

Pushing from the development6 format into a 1.9-rich-root repository
using the smart server protocol (bzr.dev on both sides) is very slow
and transfers an unreasonable amount of data. Looking at -Dhpss
output, it seems like VFS calls are used for everything.

The repo is about 1500 revisions, each containing roughly 100 files.
I'm pushing 6 revisions, for which the complete unified diff is less
than 10kb. bzr transfers around 4Mb of data to push these revisions.

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[Robert Collins (lifeless)]

On Sun, 2009-05-10 at 22:38 +0000, Jelmer Vernooij wrote:
>
> Pushing from the development6 format into a 1.9-rich-root repository
> using the smart server protocol (bzr.dev on both sides) is very slow
> and transfers an unreasonable amount of data. Looking at -Dhpss
> output, it seems like VFS calls are used for everything.
>
> The repo is about 1500 revisions, each containing roughly 100 files.
> I'm pushing 6 revisions, for which the complete unified diff is less
> than 10kb. bzr transfers around 4Mb of data to push these revisions.

Can you attach a -Dhpss log please. It shouldn't be dropping back to
VFS.

Also if you could breakpoint _ensure_real and get a backtrace that would
be good too.

-Rob

[Robert Collins (lifeless)]

On Sun, 2009-05-10 at 23:28 +0000, Robert Collins wrote:

> Also if you could breakpoint _ensure_real and get a backtrace that would
> be good too.

I've just sent a patch in that will do this automatically if you do
-Dhpss

-Rob