From 8da5d2a32c2945bb905aeb41bf98eef7d301635d Mon Sep 17 00:00:00 2001
From: zooko <>
Date: Mon, 22 Oct 2007 20:04:35 +0000
Subject: [PATCH] in-line the Memory Page

[Imported from Trac: page Performance, version 15]
---
 Performance.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Performance.md b/Performance.md
index 640f273..1477591 100644
--- a/Performance.md
+++ b/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)