Change the logic for the default for MaxMemInQueues

If we can't detect the physical memory, the new default is 8 GB on
64-bit architectures, and 1 GB on 32-bit architectures.

If we *can* detect the physical memory, the new default is
  CLAMP(256 MB, phys_mem * 0.75, MAX_DFLT)
where MAX_DFLT is 8 GB on 64-bit architectures and 2 GB on 32-bit
architectures.

You can still override the default by hand.  The logic here is simply
trying to choose a lower default value on systems with less than 12 GB
of physical RAM.

1 files changed, 7 insertions, 0 deletions

diff --git a/changes/bug11396 b/changes/bug11396
new file mode 100644
index 000000000..af94be04f
--- /dev/null
+++ b/changes/bug11396
@@ -0,0 +1,7 @@
+  o Minor features (security):
+
+    - If you don't specify MaxMemInQueues yourself, Tor now tries to
+      pick a good value based on your total system memory. Previously,
+      the default was always 8 GB. You can still override the default by
+      setting MaxMemInQueues yourself. Resolves ticket 11396.
+