Turn of file-mapping if the application configured a cache-size maximum.

1 files changed, 7 insertions, 0 deletions

diff --git a/src/block/block_map.c b/src/block/block_map.c
index 202a6a00746..93dcc4bec6c 100644
--- a/src/block/block_map.c
+++ b/src/block/block_map.c
@@ -35,6 +35,13 @@ __wt_block_map(
 		return (0);
 
 	/*
+	 * Turn off mapping if the application configured a cache size maximum,
+	 * we can't control how much of the cache size we use in that case.
+	 */
+	if (block->os_cache_max != 0)
+		return (0);
+
+	/*
 	 * Map the file into memory.
 	 * Ignore errors, we'll read the file through the cache if map fails.
 	 */