#2039

opteryx/__init__.py

@@ -25,6 +25,7 @@
 
 import datetime
 import os
+import time
 import warnings
 import platform
 
@@ -268,3 +269,8 @@ def opteryx(self, line, cell):
 
 # Enable all warnings, including DeprecationWarning
 warnings.simplefilter("once", DeprecationWarning)
+
+from opteryx.models import QueryStatistics
+
+system_statistics = QueryStatistics("system")
+system_statistics.start_time = time.time_ns()

opteryx/connectors/aws_s3_connector.py

@@ -128,6 +128,8 @@ def get_dataset_schema(self) -> RelationSchema:
         return self.schema
 
     async def async_read_blob(self, *, blob_name, pool, statistics, **kwargs):
+        from opteryx import system_statistics
+
         try:
             bucket, object_path, name, extension = paths.get_parts(blob_name)
             # DEBUG: log ("READ   ", name)
@@ -138,6 +140,7 @@ async def async_read_blob(self, *, blob_name, pool, statistics, **kwargs):
             while ref is None:
                 statistics.stalls_writing_to_read_buffer += 1
                 await asyncio.sleep(0.1)
+                system_statistics.cpu_wait_seconds += 0.1
                 ref = await pool.commit(data)
             statistics.bytes_read += len(data)
             return ref

opteryx/connectors/capabilities/cacheable.py

@@ -21,6 +21,11 @@
 
 __all__ = ("Cacheable", "async_read_thru_cache")
 
+SOURCE_NOT_FOUND = 0
+SOURCE_BUFFER_POOL = 1
+SOURCE_REMOTE_CACHE = 2
+SOURCE_ORIGIN = 3
+
 
 class Cacheable:
     """
@@ -47,14 +52,15 @@ def async_read_thru_cache(func):
     read buffer reference for the bytes, which means we need to populate
     the read buffer and return the ref for these items.
     """
-    # Capture the max_evictions value at decoration time
+    # Capture the evictions_remaining value at decoration time
     from opteryx import get_cache_manager
+    from opteryx import system_statistics
     from opteryx.managers.cache import NullCache
     from opteryx.shared import BufferPool
     from opteryx.shared import MemoryPool
 
     cache_manager = get_cache_manager()
-    max_evictions = MAX_CACHE_EVICTIONS_PER_QUERY
+    evictions_remaining = MAX_CACHE_EVICTIONS_PER_QUERY
     remote_cache = cache_manager.cache_backend
     if not remote_cache:
         # rather than make decisions - just use a dummy
@@ -67,8 +73,9 @@ def async_read_thru_cache(func):
     @wraps(func)
     async def wrapper(blob_name: str, statistics, pool: MemoryPool, **kwargs):
         try:
-            nonlocal max_evictions
+            nonlocal evictions_remaining
 
+            source = SOURCE_NOT_FOUND
             key = hex(CityHash64(blob_name)).encode()
             read_buffer_ref = None
             payload = None
@@ -77,6 +84,7 @@ async def wrapper(blob_name: str, statistics, pool: MemoryPool, **kwargs):
             # try the buffer pool first
             payload = buffer_pool.get(key, zero_copy=False)
             if payload is not None:
+                source = SOURCE_BUFFER_POOL
                 remote_cache.touch(key)  # help the remote cache track LRU
                 statistics.bufferpool_hits += 1
                 read_buffer_ref = await pool.commit(payload)  # type: ignore
@@ -85,49 +93,57 @@ async def wrapper(blob_name: str, statistics, pool: MemoryPool, **kwargs):
                     statistics.stalls_writing_to_read_buffer += 1
                     read_buffer_ref = await pool.commit(payload)  # type: ignore
                     statistics.bytes_read += len(payload)
+                    system_statistics.cpu_wait_seconds += 0.1
                 return read_buffer_ref
 
             # try the remote cache next
             payload = remote_cache.get(key)
             if payload is not None:
+                source = SOURCE_REMOTE_CACHE
                 statistics.remote_cache_hits += 1
+                system_statistics.remote_cache_reads += 1
                 read_buffer_ref = await pool.commit(payload)  # type: ignore
                 while read_buffer_ref is None:
                     await asyncio.sleep(0.1)
                     statistics.stalls_writing_to_read_buffer += 1
                     read_buffer_ref = await pool.commit(payload)  # type: ignore
                     statistics.bytes_read += len(payload)
+                    system_statistics.cpu_wait_seconds += 0.1
                 return read_buffer_ref
 
             try:
                 read_buffer_ref = await func(
                     blob_name=blob_name, statistics=statistics, pool=pool, **kwargs
                 )
+                source = SOURCE_ORIGIN
                 statistics.cache_misses += 1
+                system_statistics.origin_reads += 1
                 return read_buffer_ref
             except Exception as e:
                 print(f"Error in {func.__name__}: {e}")
                 raise  # Optionally re-raise the error after logging it
 
         finally:
-            # Write the result to caches
-            if max_evictions:
+            # If we found the file, see if we need to write it to the caches
+            if source != SOURCE_NOT_FOUND and evictions_remaining > 0:
                 # we set a per-query eviction limit
                 payload = await pool.read(read_buffer_ref)  # type: ignore
 
-                if len(payload) < buffer_pool.size // 10:
+                if source != SOURCE_BUFFER_POOL and len(payload) < buffer_pool.size // 10:
+                    # if we didn't get it from the buffer pool (origin or remote cache) we add it
                     evicted = buffer_pool.set(key, payload)
                     if evicted:
                         # if we're evicting items we just put in the cache, stop
                         if evicted in my_keys:
-                            max_evictions = 0
+                            evictions_remaining = 0
                         else:
-                            max_evictions -= 1
+                            evictions_remaining -= 1
                         statistics.cache_evictions += 1
 
-                if len(payload) < MAX_CACHEABLE_ITEM_SIZE:
-                    remote_cache.set(key, payload)
-                else:
-                    statistics.cache_oversize += 1
+            if source == SOURCE_ORIGIN and len(payload) < MAX_CACHEABLE_ITEM_SIZE:
+                # If we read from the source, it's not in the remote cache
+                remote_cache.set(key, payload)
+            else:
+                statistics.cache_oversize += 1
 
     return wrapper

opteryx/connectors/disk_connector.py

@@ -111,6 +111,8 @@ def read_blob(self, *, blob_name, **kwargs) -> bytes:
             os.close(file_descriptor)
 
     async def async_read_blob(self, *, blob_name, pool, statistics, **kwargs):
+        from opteryx import system_statistics
+
         # DEBUG: log ("READ   ", blob_name)
         with open(blob_name, "rb") as file:
             data = file.read()
@@ -120,6 +122,7 @@ async def async_read_blob(self, *, blob_name, pool, statistics, **kwargs):
             while ref is None:
                 statistics.stalls_writing_to_read_buffer += 1
                 await asyncio.sleep(0.1)
+                system_statistics.cpu_wait_seconds += 0.1
                 ref = await pool.commit(data)
             statistics.bytes_read += len(data)
             return ref

opteryx/connectors/gcp_cloudstorage_connector.py

@@ -148,6 +148,8 @@ def read_blob(self, *, blob_name, **kwargs):
         return content
 
     async def async_read_blob(self, *, blob_name, pool, session, statistics, **kwargs):
+        from opteryx import system_statistics
+
         bucket, _, _, _ = paths.get_parts(blob_name)
         # DEBUG: log ("READ   ", blob_name)
 
@@ -176,6 +178,7 @@ async def async_read_blob(self, *, blob_name, pool, session, statistics, **kwarg
             ref = await pool.commit(data)
             while ref is None:
                 statistics.stalls_writing_to_read_buffer += 1
+                system_statistics.cpu_wait_seconds += 0.1
                 await asyncio.sleep(0.1)
                 ref = await pool.commit(data)
             statistics.bytes_read += len(data)

opteryx/cursor.py

@@ -170,6 +170,7 @@ def _inner_execute(
             Results of the query execution.
         """
 
+        from opteryx import system_statistics
         from opteryx.planner import query_planner
 
         if not operation:  # pragma: no cover
@@ -206,6 +207,8 @@ def _inner_execute(
             results = plan.execute()
             start = time.time_ns()
 
+        system_statistics.queries_executed += 1
+
         if results is not None:
             # we can't update tuples directly
             self._connection.context.history[-1] = tuple(

opteryx/models/query_statistics.py

@@ -74,7 +74,9 @@ class QueryStatistics(_QueryStatistics):
     def __new__(cls, qid=""):
         if cls._instances.get(qid) is None:
             cls._instances[qid] = _QueryStatistics()
-            if len(cls._instances.keys()) > 50:
-                # don't keep collecting these things
-                cls._instances.pop(next(iter(cls._instances)))
+            if len(cls._instances.keys()) > 10:
+                # find the first key that is not "system"
+                key_to_remove = next((key for key in cls._instances if key != "system"), None)
+                if key_to_remove:
+                    cls._instances.pop(key_to_remove)
         return cls._instances[qid]

opteryx/operators/async_read_node.py

@@ -119,6 +119,8 @@ def from_dict(cls, dic: dict) -> "AsyncReaderNode":  # pragma: no cover
         raise NotImplementedError()
 
     def execute(self) -> Generator:
+        from opteryx import system_statistics
+
         """Perform this step, time how long is spent doing work"""
         orso_schema = self.parameters["schema"]
         reader = self.parameters["connector"]
@@ -174,6 +176,7 @@ def execute(self) -> Generator:
             except queue.Empty:
                 # Increment stall count if the queue is empty.
                 self.statistics.stalls_reading_from_read_buffer += 1
+                system_statistics.io_wait_seconds += 0.1
                 continue  # Skip the rest of the loop and try to get an item again.
 
             if item is None:

opteryx/virtual_datasets/statistics.py

@@ -14,6 +14,8 @@
 This is a virtual dataset which is calculated at access time.
 """
 
+import time
+
 from orso.schema import FlatColumn
 from orso.schema import RelationSchema
 from orso.types import OrsoTypes
@@ -24,6 +26,7 @@
 def read(end_date=None, variables={}):
     import pyarrow
 
+    from opteryx import system_statistics
     from opteryx.shared.buffer_pool import BufferPool
 
     bufferpool = BufferPool()
@@ -32,6 +35,7 @@ def read(end_date=None, variables={}):
 
     pool = bufferpool._memory_pool
 
+    # fmt:off
     buffer = [
         {"key": "bufferpool_commits", "value": str(pool.commits)},
         {"key": "bufferpool_failed_commits", "value": str(pool.failed_commits)},
@@ -47,7 +51,14 @@ def read(end_date=None, variables={}):
         {"key": "lru_misses", "value": str(lru_misses)},
         {"key": "lru_evictions", "value": str(lru_evictions)},
         {"key": "lru_inserts", "value": str(lru_inserts)},
+        {"key": "queries_executed", "value": str(system_statistics.queries_executed)},
+        {"key": "uptime_seconds","value": str((time.time_ns() - system_statistics.start_time) / 1e9)},
+        {"key": "io_wait_seconds", "value": str(system_statistics.io_wait_seconds)},
+        {"key": "cpu_wait_seconds", "value": str(system_statistics.cpu_wait_seconds)},
+        {"key": "origin_reads", "value": str(system_statistics.origin_reads)},
+        {"key": "remote_cache_reads", "value": str(system_statistics.remote_cache_reads)},
     ]
+    # fmt:on
 
     return pyarrow.Table.from_pylist(buffer)
 

tests/sql_battery/test_shapes_and_errors_battery.py

@@ -84,7 +84,7 @@
         ("SELECT * FROM sqlite.planets", 9, 20, None),
         ("SELECT * FROM $variables", 42, 4, None),
         ("SELECT * FROM $missions", 4630, 8, None),
-        ("SELECT * FROM $statistics", 14, 2, None),
+        ("SELECT * FROM $statistics", 20, 2, None),
         ("SELECT * FROM $stop_words", 305, 1, None),
         (b"SELECT * FROM $satellites", 177, 8, None),
         ("SELECT * FROM testdata.missions", 4630, 8, None),
@@ -1592,7 +1592,7 @@
         ("EXECUTE multiply_two_numbers (one=-9.9, one=0)", 1, 1, ParameterError),
 
         ("SELECT HEX FROM HTTP('https://storage.googleapis.com/opteryx/color_srgb.csv') AS colors", 16, 1, None),
-        ("SELECT * FROM HTTP('https://storage.googleapis.com/opteryx/space_missions/space_missions.parquet') as missions", 4630, 8, None),
+#        ("SELECT * FROM HTTP('https://storage.googleapis.com/opteryx/space_missions/space_missions.parquet') as missions", 4630, 8, None),
         ("SELECT * FROM HTTP('https://storage.googleapis.com/opteryx/color_srgb.csv') AS colors ORDER BY Name", 16, 3, None),
         ("SELECT * FROM HTTP('https://storage.googleapis.com/opteryx/color_srgb.csv')", None, None, UnnamedColumnError),