Tweak cache sizes to account for large numbers of decimated tables

nilmdb/cmdline/info.py

@@ -21,5 +21,8 @@ def cmd_info(self):
     printf("Server URL: %s\n", self.client.geturl())
     dbinfo = self.client.dbinfo()
     printf("Server database path: %s\n", dbinfo["path"])
-    printf("Server database size: %s\n", human_size(dbinfo["size"]))
+    for (desc, field) in [("used by NilmDB", "size"),
-    printf("Server database free space: %s\n", human_size(dbinfo["free"]))
+                          ("used by other", "other"),
+                          ("reserved", "reserved"),
+                          ("free", "free")]:
+        printf("Server disk space %s: %s\n", desc, human_size(dbinfo[field]))

nilmdb/server/bulkdata.py

@@ -19,8 +19,8 @@ from . import rocket
 
 # Up to 256 open file descriptors at any given time.
 # These variables are global so they can be used in the decorator arguments.
-table_cache_size = 16
+table_cache_size = 32
-fd_cache_size = 16
+fd_cache_size = 8
 
 @nilmdb.utils.must_close(wrap_verify = False)
 class BulkData(object):

nilmdb/server/nilmdb.py

@@ -176,7 +176,7 @@ class NilmDB(object):
             raise NilmDBError("start must precede end")
         return (start, end)
 
-    @nilmdb.utils.lru_cache(size = 16)
+    @nilmdb.utils.lru_cache(size = 64)
     def _get_intervals(self, stream_id):
         """
         Return a mutable IntervalSet corresponding to the given stream ID.

nilmdb/server/server.py

@@ -167,9 +167,13 @@ class Root(NilmApp):
         """Return a dictionary with the database path,
         size of the database in bytes, and free disk space in bytes"""
         path = self.db.get_basepath()
+        usage = psutil.disk_usage(path)
+        dbsize = nilmdb.utils.du(path)
         return { "path": path,
-                 "size": nilmdb.utils.du(path),
+                 "size": dbsize,
-                 "free": psutil.disk_usage(path).free }
+                 "other": usage.used - dbsize,
+                 "reserved": usage.total - usage.used - usage.free,
+                 "free": usage.free }
 
 class Stream(NilmApp):
     """Stream-specific operations"""

tests/test_cmdline.py

@@ -245,8 +245,10 @@ class TestCmdline(object):
         self.contain("Client version: " + nilmdb.__version__)
         self.contain("Server version: " + test_server.version)
         self.contain("Server database path")
-        self.contain("Server database size")
+        self.contain("Server disk space used by NilmDB")
-        self.contain("Server database free space")
+        self.contain("Server disk space used by other")
+        self.contain("Server disk space reserved")
+        self.contain("Server disk space free")
 
     def test_04_createlist(self):
         # Basic stream tests, like those in test_client.