rpm/rpm-4.9.x-mpsize.patch

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commit d8cd36058b528f56bd579204426143be1e1eac6d
Author: Panu Matilainen <pmatilai@redhat.com>
Date: Wed Feb 8 10:56:09 2012 +0200
Switch back to former, much smaller BDB memory pool size (RhBug:752897)
- A larger cache is beneficial in various scenarios, but triggers
horrible worst-case performance under memory pressure (or so my
current theory goes, there might be other factors too). The
worst-case degration is orders of magnitude bigger than the best-case
improvements from the larger cache and for many use-cases doesn't
make a whole lot difference. We could/should tune the cache with
priorizing indexes and all, and perhaps dynamically select the
cache size but for now, the 1Mb cache size is known to "just work".
diff --git a/macros.in b/macros.in
index f835fec..6034721 100644
--- a/macros.in
+++ b/macros.in
@@ -535,7 +535,7 @@ print (t)\
#
# Misc BDB tuning options
-%__dbi_other mp_mmapsize=128Mb mp_size=64Mb
+%__dbi_other mp_mmapsize=128Mb mp_size=1Mb
%_dbi_config %{?__dbi_other}