increase qps_worker max lifetime
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index 5519666..8b67d92 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -89,7 +89,7 @@
   jobspec = jobset.JobSpec(
       cmdline=cmdline,
       shortname=shortname,
-      timeout_seconds=30*60)
+      timeout_seconds=2*60*60)
   return QpsWorkerJob(jobspec, language, host_and_port)