Greg Hudson wrote:
>On Tue, 2002-06-18 at 12:15, Karl Fogel wrote:
>
>
>>Greg Hudson <ghudson@MIT.EDU> writes:
>>
>>
>>>On Sun, 2002-06-16 at 19:28, Karl Fogel wrote:
>>>
>>>
>>>>The big question is, how much does it improve performance? Our big
>>>>problem case was undeltifying files larger than the delta window
>>>>size.
>>>>
>>>>
>>>Um, that problem case would have been due to a bug of some sort, not due
>>>to the lack of a delta combiner.
>>>
>>>
>>I'm not sure precisely what is being asserted or denied above :-).
>>
>>
>
>My understanding is that, at some time in the past, it was observed that
>if we deltified files above the window size, memory usage went through
>the roof. That's clearly a bug; windows are there to place a ceiling on
>memory usage, not make it bigger. I don't know if anyone has checked
>whether this bug still exists.
>
The memory problem was probably caused by overlapping source windows.
That, and and the fact that pools didn't know how to free memory the
last time we tested that.
--
Brane Čibej <brane_at_xbc.nu> http://www.xbc.nu/brane/
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Received on Thu Jun 20 01:36:03 2002