error fast on too little memory

Author: TrevorBergeron

bigframes/functions/_function_client.py

@@ -742,11 +742,9 @@ def get_remote_function_specs(self, remote_function_name):
 
 def _infer_milli_cpus_from_memory(memory_mib: int) -> int:
     # observed values, not formally documented by cloud run functions
-    if memory_mib <= 128:
-        return 83
-    elif memory_mib <= 256:
-        return 167
-    elif memory_mib <= 512:
+    if memory_mib < 512:
+        raise ValueError("Cloud run supports at minimum 512MiB per instance")
+    elif memory_mib == 512:
         return 333
     elif memory_mib <= 1024:
         return 583

tests/system/large/functions/test_remote_function.py

@@ -2169,12 +2169,8 @@ def square(x: int) -> int:
         pytest.param(32769, id="set-32769-too-high"),
     ],
 )
-@pytest.mark.flaky(retries=2, delay=120)
 def test_remote_function_gcf_memory_unsupported(session, memory_mib):
-    with pytest.raises(
-        google.api_core.exceptions.InvalidArgument,
-        match="Invalid value specified for container memory",
-    ):
+    with pytest.raises(ValueError, match="Cloud run supports"):
 
         @session.remote_function(
             reuse=False,