diff --git a/src/powercontext/builtin/persistence/oceanbase/profile.py b/src/powercontext/builtin/persistence/oceanbase/profile.py
index 497e927f8..d6f872b0b 100644
--- a/src/powercontext/builtin/persistence/oceanbase/profile.py
+++ b/src/powercontext/builtin/persistence/oceanbase/profile.py
@@ -86,6 +86,7 @@ async def open(
         engine = create_async_engine(
             config.url.get_secret_value(),
             echo=config.echo,
+            hide_parameters=True,
             pool_pre_ping=config.pool_pre_ping,
         )
         database = AsyncDatabase.own(engine)
diff --git a/src/powercontext/builtin/persistence/seekdb/profile.py b/src/powercontext/builtin/persistence/seekdb/profile.py
index 8c0238210..1a78b2298 100644
--- a/src/powercontext/builtin/persistence/seekdb/profile.py
+++ b/src/powercontext/builtin/persistence/seekdb/profile.py
@@ -181,6 +181,7 @@ def _create_engine(config: SeekDBConfig, connection_options: Mapping[str, object
         url,
         connect_args=options,
         echo=config.echo,
+        hide_parameters=True,
         pool_pre_ping=config.pool_pre_ping,
     )
 
diff --git a/src/powercontext/builtin/persistence/sqlite/profile.py b/src/powercontext/builtin/persistence/sqlite/profile.py
index 3d8cfbbb3..40836c739 100644
--- a/src/powercontext/builtin/persistence/sqlite/profile.py
+++ b/src/powercontext/builtin/persistence/sqlite/profile.py
@@ -88,7 +88,7 @@ async def open(
         """Create, initialize and exclusively own one SQLite engine."""
 
         _create_database_directory(config.url)
-        engine_options: dict[str, object] = {"echo": config.echo}
+        engine_options: dict[str, object] = {"echo": config.echo, "hide_parameters": True}
         if config.is_in_memory:
             engine_options["poolclass"] = StaticPool
         engine = create_async_engine(config.url, **engine_options)
diff --git a/tests/builtin/persistence/test_oceanbase_profile.py b/tests/builtin/persistence/test_oceanbase_profile.py
index cfd9b4bb0..e7a4d679b 100644
--- a/tests/builtin/persistence/test_oceanbase_profile.py
+++ b/tests/builtin/persistence/test_oceanbase_profile.py
@@ -127,6 +127,29 @@ async def scenario() -> None:
     asyncio.run(scenario())
 
 
+def test_oceanbase_profile_hides_sql_parameters(monkeypatch: pytest.MonkeyPatch) -> None:
+    async def scenario() -> None:
+        captured: dict[str, object] = {}
+        engine = _Engine()
+
+        def create_engine(_url: object, **options: object) -> AsyncEngine:
+            captured.update(options)
+            return cast(AsyncEngine, engine)
+
+        async def create_no_tables(_connection: object, _tables: tuple[Table, ...]) -> None:
+            return None
+
+        monkeypatch.setattr(oceanbase_profile_module, "create_async_engine", create_engine)
+        monkeypatch.setattr(oceanbase_profile_module, "create_tables", create_no_tables)
+
+        async with OceanBaseProfile.open(OceanBaseConfig(url=SecretStr(VALID_URL)), tables=()):
+            pass
+
+        assert captured["hide_parameters"] is True
+
+    asyncio.run(scenario())
+
+
 @pytest.mark.parametrize("row", [None, ("ob_compatibility_mode", "ORACLE")])
 def test_profile_requires_an_oceanbase_mysql_tenant(
     row: tuple[str, str] | None,
diff --git a/tests/builtin/persistence/test_seekdb_profile.py b/tests/builtin/persistence/test_seekdb_profile.py
index 1ff10f0e7..19f7aee6c 100644
--- a/tests/builtin/persistence/test_seekdb_profile.py
+++ b/tests/builtin/persistence/test_seekdb_profile.py
@@ -129,6 +129,7 @@ def create_engine(url: object, **options: object) -> AsyncEngine:
         "init_command": "SET autocommit = 0",
         "unix_socket": "seekdb.sock",
     }
+    assert captured["hide_parameters"] is True
 
 
 def test_profile_closes_engine_before_instance(tmp_path, monkeypatch: pytest.MonkeyPatch) -> None:
diff --git a/tests/e2e/test_observability.py b/tests/e2e/test_observability.py
index 08a8dbb9e..bbbfd3680 100644
--- a/tests/e2e/test_observability.py
+++ b/tests/e2e/test_observability.py
@@ -17,6 +17,7 @@
 import asyncio
 import json
 import logging
+import sqlite3
 from pathlib import Path
 
 import httpx
@@ -286,6 +287,49 @@ async def scenario() -> str:
     assert scope_id not in signal_payload
 
 
+def test_database_failure_log_does_not_include_memory_content(caplog, tmp_path) -> None:
+    database_path = tmp_path / "failure-log.db"
+    app = create_server_app(
+        settings=ServerSettings(
+            database=SQLiteConfig(url=f"sqlite+aiosqlite:///{database_path}"),
+            mcp=McpConfig(enabled=False),
+        )
+    )
+    memory_content = "PROBE-SENSITIVE-MEMORY-1318"
+
+    with TestClient(app, raise_server_exceptions=False) as client:
+        with sqlite3.connect(database_path) as connection:
+            connection.executescript("""
+                CREATE TRIGGER reject_memory_insert
+                BEFORE INSERT ON pc_memory_entry_versions
+                BEGIN
+                    SELECT RAISE(ABORT, 'forced persistence failure');
+                END;
+            """)
+        caplog.clear()
+        with caplog.at_level(logging.ERROR, logger="powercontext.server.app"):
+            response = client.post(
+                "/v1/memory/remember",
+                json={"scope_id": "project:failure-log", "kind": "fact", "text": memory_content},
+            )
+
+    records = [
+        record for record in caplog.records if getattr(record, "event", None) == "application.operation.completed"
+    ]
+    assert response.status_code == 500
+    assert len(records) == 1
+    record = records[0]
+    assert record.operation == "remember_memory"
+    assert record.outcome == "failure"
+    assert record.error_code == "internal_error"
+    assert record.exc_info is not None
+
+    formatter = logging.Formatter()
+    rendered_records = tuple(formatter.format(record) for record in caplog.records)
+    assert "forced persistence failure" in formatter.format(record)
+    assert all(memory_content not in rendered for rendered in rendered_records)
+
+
 def test_inference_spans_join_the_operation_trace_only_when_instrumented(monkeypatch, tmp_path) -> None:
     # Pydantic AI also resolves already-constructed models through `infer_model`, so pass those through.
     monkeypatch.setattr(