Revert "fix: slow responses on schema cache reload"

This reverts commit 727ef465c1.

Also documents requests waiting for the schema cache.

test/io/test_big_schema.py

@@ -7,28 +7,8 @@ from util import *
 from postgrest import *
 
 
-def test_first_request_succeeds(defaultenv):
-    "the first request suceeds fast since the admin server readiness was checked before"
-
-    env = {
-        **defaultenv,
-        "PGRST_DB_SCHEMAS": "apflora",
-        "PGRST_DB_POOL": "2",
-        "PGRST_DB_ANON_ROLE": "postgrest_test_anonymous",
-        "PGRST_SERVER_TIMING_ENABLED": "true",
-    }
-
-    with run(env=env, wait_max_seconds=30) as postgrest:
-        response = postgrest.session.get("/tpopmassn?select=*,tpop(*)")
-        assert response.status_code == 200
-
-        server_timings = parse_server_timings_header(response.headers["Server-Timing"])
-        plan_dur = server_timings["plan"]
-        assert plan_dur < 2.0
-
-
-def test_requests_do_not_wait_for_schema_cache_reload(defaultenv):
-    "requests that use the schema cache (e.g. resource embedding) do not wait for the schema cache to reload"
+def test_requests__wait_for_schema_cache_reload(defaultenv):
+    "requests that use the schema cache (e.g. resource embedding) wait for the schema cache to reload"
 
     env = {
         **defaultenv,
@@ -48,10 +28,9 @@ def test_requests_do_not_wait_for_schema_cache_reload(defaultenv):
         response = postgrest.session.get("/tpopmassn?select=*,tpop(*)")
         assert response.status_code == 200
 
-        # response should be fast
         server_timings = parse_server_timings_header(response.headers["Server-Timing"])
         plan_dur = server_timings["plan"]
-        assert plan_dur < 2.0
+        assert plan_dur > 10000.0
 
 
 # TODO: This test fails now because of https://github.com/PostgREST/postgrest/pull/2122