diff --git a/src/job-exporter/src/collector.py b/src/job-exporter/src/collector.py
index 6e85e68fa9..e6846457e0 100644
--- a/src/job-exporter/src/collector.py
+++ b/src/job-exporter/src/collector.py
@@ -180,7 +180,9 @@ def __init__(self, name, sleep_time, atomic_ref, iteration_counter):
         histogram_key = "collector_%s_iteration_lantecy_seconds" % self.name
         histogram_desc = "latency for execute one interation of %s collector (seconds)" % \
                 self.name
-        self.collector_histogram = Histogram(histogram_key, histogram_desc)
+        self.collector_histogram = Histogram(histogram_key, histogram_desc,
+                buckets=(.005, .01, .025, .05, .075, .1, .25, .5, .75, 1.0, 2.5, 5.0,
+                    7.5, 10.0, 12.5, 15.0, 17.5, 20.0, float("inf")))
 
         logger.debug("init %s with sleep_time %d", self.name, self.sleep_time)
 
@@ -198,7 +200,7 @@ def collect(self):
                 logger.debug("finished collect metrcis from %s, will sleep for %s",
                         self.name, self.sleep_time)
 
-                time.sleep(self.sleep_time)
+            time.sleep(self.sleep_time)
 
     def collect_impl(self):
         """ implementations are expected to return an array of
@@ -363,8 +365,9 @@ def collect_impl(self):
                 ContainerCollector.stats_timeout)
         self.stats_info_ref.get_and_set(stats_obj)
 
-        logger.debug("all_conns is %s, gpu_info is %s, stats_obj is %s",
-                all_conns, gpu_infos, stats_obj)
+        logger.debug("all_conns is %s", all_conns)
+        logger.debug("gpu_info is %s", gpu_infos)
+        logger.debug("stats_obj is %s", stats_obj)
 
         return self.collect_container_metrics(stats_obj, gpu_infos, all_conns)
 
diff --git a/src/job-exporter/src/main.py b/src/job-exporter/src/main.py
index a73d913d88..3d1b47f49c 100644
--- a/src/job-exporter/src/main.py
+++ b/src/job-exporter/src/main.py
@@ -142,7 +142,7 @@ def main(args):
     # should only sleep 10s to adapt to scrape interval
     collector_args = [
             ("docker_daemon_collector", interval, collector.DockerCollector),
-            ("gpu_collector", interval, collector.GpuCollector, gpu_info_ref),
+            ("gpu_collector", interval / 2, collector.GpuCollector, gpu_info_ref),
             ("container_collector", interval - 18, collector.ContainerCollector,
                 gpu_info_ref, stats_info_ref, args.interface),
             ("zombie_collector", interval, collector.ZombieCollector, stats_info_ref),