diff --git a/src/Command/RppsImport.php b/src/Command/RppsImport.php
index 597d290..481b9ba 100755
--- a/src/Command/RppsImport.php
+++ b/src/Command/RppsImport.php
@@ -7,11 +7,13 @@
 use Doctrine\DBAL\Platforms\AbstractMySQLPlatform;
 use Doctrine\ORM\EntityManagerInterface;
 use Psr\Log\LoggerInterface;
+use RuntimeException;
 use Symfony\Component\Console\Attribute\AsCommand;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
 use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 use Throwable;
 
 #[AsCommand(
@@ -34,6 +36,8 @@ class RppsImport extends Command
     public function __construct(
         protected readonly RPPSService $rppsService,
         protected readonly EntityManagerInterface $em,
+        #[Autowire('%kernel.debug%')]
+        private readonly bool $debug = false,
         private readonly ?LoggerInterface $logger = null,
     ) {
         parent::__construct();
@@ -85,12 +89,32 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $this->rppsService->setOutput($output);
         $this->rppsService->setMaxPurgeRatio((float) $input->getOption('max-purge-ratio'));
 
+        // With the debug toolbar active, doctrine-bundle keeps every executed query -- with a
+        // backtrace -- for the whole process. At roughly five queries per row that exhausts the
+        // container a few hundred thousand rows in, and the task is SIGKILLed with no usable
+        // error. Note the setSQLLogger(null) below does not prevent this: it is the DBAL 2
+        // mechanism, and collection now happens through a middleware. APP_ENV is `staging` on
+        // the scheduled task, so debug is on unless it is explicitly turned off.
+        if ($this->debug) {
+            throw new RuntimeException(
+                'Refusing to run with debug enabled: query collection would exhaust memory '
+                . 'long before the import completes. Re-run with --no-debug.'
+            );
+        }
+
         if (!$this->acquireLock()) {
+            // Deliberately a failure, not a success. A scheduled run that silently does nothing
+            // is the exact outcome this command exists to avoid: ECS would record a clean exit
+            // and nothing would reach Sentry, so the register could go weeks without an import.
+            // This also covers a lock left behind by a killed task -- MySQL frees it only once
+            // it notices the dead connection, which can take longer than the gap between runs.
             $output->writeln(
-                '<comment>Another RPPS import is already running, skipping this run.</comment>'
+                '<error>Another RPPS import holds the lock, so this run did nothing. If no import '
+                . 'is actually running, a previous one was killed and the lock has not been '
+                . "released yet: check SELECT IS_USED_LOCK('rpps_import').</error>"
             );
 
-            return Command::SUCCESS;
+            return Command::FAILURE;
         }
 
         try {
diff --git a/src/Service/FileParserService.php b/src/Service/FileParserService.php
index 400646d..07267f7 100755
--- a/src/Service/FileParserService.php
+++ b/src/Service/FileParserService.php
@@ -75,9 +75,10 @@ protected function processFile(
         // of the consecutive rows belonging to the same practitioner.
         $batchSize = 500;
 
-        // Progress every 50k rows rather than every batch: at one line per batch a full run
-        // emitted ~40k lines, each of which is a CloudWatch PutLogEvents call on ECS.
-        $progressEvery = 50000;
+        // Progress every 10k rows: one line per batch meant ~40k lines per run, but 50k was
+        // too sparse to tell a working import from a hung one -- minutes of silence either way.
+        // At ~600 rows/s this is a heartbeat every ~17s, and ~227 lines for a full run.
+        $progressEvery = 10000;
 
         $lineCount = $this->fileProcessor->getLinesCount($file);