Use memory-mapped segmented journal by default

Segmented file implementation requires a buffer double the size
of the file's maximum size. This ends up being allocated on-healp, which
is wasteful from effeciency perspective. Switch default configuration
so that it uses memory-mapped files instead.

JIRA: CONTROLLER-1954
Change-Id: Icad9ef74c50467323e31567828a949c0cae52a9e
Signed-off-by: Robert Varga <robert.varga@pantheon.tech>

diff --git a/opendaylight/md-sal/sal-clustering-config/src/main/resources/initial/factory-akka.conf b/opendaylight/md-sal/sal-clustering-config/src/main/resources/initial/factory-akka.conf
index 97f8cce6422e96750b8f411dc38794242c728f65..a70ca5de7a2e342d00d30256672f41880f7c5771 100644 (file)
--- a/opendaylight/md-sal/sal-clustering-config/src/main/resources/initial/factory-akka.conf
+++ b/opendaylight/md-sal/sal-clustering-config/src/main/resources/initial/factory-akka.conf
@@ -136,9 +136,9 @@ odl-cluster-data {
           max-entry-size = 16M
           # Maximum size of a segment
           max-segment-size = 128M
-          # Map each segment into memory. Note that while this can improve performance,
-          # it will also place additional burden on system resources.
-          memory-mapped = false
+          # Map each segment into memory. Defaults to true, use false to keep a heap-based
+          # buffer instead.
+          memory-mapped = true
         }
       }