define map size separately for 32 and 64 bit systems

translate.go

@@ -25,8 +25,6 @@ const (
 )
 
 const (
-	DefaultMapSize = 10 * (1 << 30) // 10GB
-
 	DefaultReplicationRetryInterval = 1 * time.Second
 )
 

translate_mapsize_386.go

@@ -0,0 +1,5 @@
+package pilosa
+
+// DefaultMapSize is the default size of mapped memory for the translate store.
+// It is passed as an int to syscall.Mmap and so must be < 2^31
+const DefaultMapSize = (1 << 31) - 1 // 2GB

translate_mapsize_all64bitsystems.go

@@ -0,0 +1,8 @@
+// +build !386
+
+package pilosa
+
+// DefaultMapSize is the default size of mapped memory for the translate store.
+// It is passed as an int to syscall.Mmap and so can only be larger than 2^31 on
+// 64bit systems.
+const DefaultMapSize = 10 * (1 << 30) // 10GB