Changeset: cf2ff66d08fa for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=cf2ff66d08fa
Modified Files:
gdk/gdk_utils.mx
Branch: Dec2011
Log Message:
GDKinit: reduce GDK_mmap_minsize & GDK_mem_bigsize by number of threads
With T concurrent threads, we reduce GDK_mmap_minsize & GDK_mem_bigsize
by 1/T such that the combined size does not exceed physical memory.
diffs (12 lines):
diff --git a/gdk/gdk_utils.mx b/gdk/gdk_utils.mx
--- a/gdk/gdk_utils.mx
+++ b/gdk/gdk_utils.mx
@@ -1755,7 +1755,7 @@ GDKinit(opt *set, int setlen)
#else
/* WARNING: This unconditionally overwrites above settings, */
/* incl. setting via MonetDB env. var. "gdk_mmap_minsize" ! */
- GDK_mmap_minsize = GDK_mem_bigsize = MIN( 1<<30 ,
(GDK_mem_maxsize_max/6) );
+ GDK_mmap_minsize = GDK_mem_bigsize = MIN( 1<<30 ,
(GDK_mem_maxsize_max/6) / (GDKnr_threads ? GDKnr_threads : 1) );
/* per op: 2 args + 1 res, each with head & tail => (2+1)*2 = 6
^ */
#endif
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