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in-line the Memory Page 

[Imported from Trac: page Performance, version 15]
zooko 2007-10-22 20:04:35 +00:00
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16
Performance.md

@ -2,7 +2,21 @@ Some basic notes on performance:
## Memory Footprint
[The [MemoryFootprint](MemoryFootprint) page](MemoryFootprint) has more specific information.
We try to keep the Tahoe memory footprint low by continuously monitoring the
memory consumed by common operations like upload and download.
For each currently active upload or download, we never handle more than a
single segment of data at a time. This serves to keep the data-driven
footprint down to something like 4MB or 5MB per active upload/download.
Some other notes on memory footprint:
* importing sqlite (for the share-lease database) raised the static
footprint by 6MB, going from 24.3MB to 31.5MB (as evidenced by the munin
graph from 2007-08-29 to 2007-09-02).
* importing nevow and twisted.web (for the web interface) raises the static
footprint by about 3MB (from 12.8MB to 15.7MB).
The
[32-bit memory usage graph](http://allmydata.org/tahoe-figleaf-graph/hanford.allmydata.com-tahoe_memstats.html)