Increase cache invalidation times for mb.cache.buf and mb.fss.

This is to avoid thrashing on sparse streams and streams that hit max msgs limits where we have to remove the first that nay be in a totally different block.

Signed-off-by: Derek Collison <[email protected]>

server/filestore.go

@@ -295,13 +295,13 @@ const (
 	// Maximum size of a write buffer we may consider for re-use.
 	maxBufReuse = 2 * 1024 * 1024
 	// default cache buffer expiration
-	defaultCacheBufferExpiration = 2 * time.Second
+	defaultCacheBufferExpiration = 10 * time.Second
 	// default sync interval
 	defaultSyncInterval = 2 * time.Minute
 	// default idle timeout to close FDs.
 	closeFDsIdle = 30 * time.Second
 	// default expiration time for mb.fss when idle.
-	defaultFssExpiration = 10 * time.Second
+	defaultFssExpiration = 2 * time.Minute
 	// coalesceMinimum
 	coalesceMinimum = 16 * 1024
 	// maxFlushWait is maximum we will wait to gather messages to flush.