X-Git-Url: http://git.vrable.net/?a=blobdiff_plain;f=bluesky%2Finit.c;h=520ed57518f4c6ec2402b279038c506fd78e9ebc;hb=641411b0a7ce9afa309bea28c01320eda913b2d2;hp=9a7a6ebfae566117d1ba1c1a110aa2e3299c10a6;hpb=fb15c75f3c8eeb3d7b277795ced44bb4928273a1;p=bluesky.git

diff --git a/bluesky/init.c b/bluesky/init.c
index 9a7a6eb..520ed57 100644
--- a/bluesky/init.c
+++ b/bluesky/init.c
@@ -17,7 +17,24 @@ BlueSkyOptions bluesky_options;
 
 /* Maximum number of threads to use in any particular thread pool, or -1 for no
  * limit */
-int bluesky_max_threads = -1;
+int bluesky_max_threads = 16;
+
+/* Watermark levels for cache tuning: these control when dirty data is flushed
+ * from cache, when clean data is dropped from the cache, etc.  These values
+ * are measured in blocks, not bytes.
+ *
+ * There are a few relevant levels:
+ *   low: Below this point, data is not forced out due to memory pressure
+ *   medium: At this point start flushing data to get back below medium
+ *   high: Flush data very aggressively (launch extra tasks if needed)
+ */
+int bluesky_watermark_low_dirty    = (64 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_medium_dirty = (96 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_high_dirty   = (192 << 20) / BLUESKY_BLOCK_SIZE;
+
+int bluesky_watermark_low_total    = (64 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_medium_total = (128 << 20) / BLUESKY_BLOCK_SIZE;
+int bluesky_watermark_high_total   = (256 << 20) / BLUESKY_BLOCK_SIZE;
 
 /* Environment variables that can be used to initialize settings. */
 static struct {