diff --git a/ceilometer/compute/pollsters/cpu.py b/ceilometer/compute/pollsters/cpu.py
index f0ee34f71..c3ebba418 100644
--- a/ceilometer/compute/pollsters/cpu.py
+++ b/ceilometer/compute/pollsters/cpu.py
@@ -56,9 +56,8 @@ class CPUPollster(plugin.ComputePollster):
                 LOG.debug(_('Obtaining CPU time is not implemented for %s'
                             ), manager.inspector.__class__.__name__)
             except Exception as err:
-                LOG.error(_('could not get CPU time for %(id)s: %(e)s') % (
-                          {'id': instance.id, 'e': err}))
-                LOG.exception(err)
+                LOG.exception(_('could not get CPU time for %(id)s: %(e)s'),
+                              {'id': instance.id, 'e': err})
 
 
 class CPUUtilPollster(plugin.ComputePollster):
@@ -85,8 +84,8 @@ class CPUUtilPollster(plugin.ComputePollster):
                 LOG.debug(_('Exception while getting samples %s'), err)
             except NotImplementedError:
                 # Selected inspector does not implement this pollster.
-                LOG.debug(_('Obtaining CPU Util is not implemented for %s'
-                            ), manager.inspector.__class__.__name__)
+                LOG.debug(_('Obtaining CPU Util is not implemented for %s'),
+                          manager.inspector.__class__.__name__)
             except Exception as err:
-                LOG.error(_('Could not get CPU Util for %(id)s: %(e)s'), (
-                          {'id': instance.id, 'e': err}))
+                LOG.exception(_('Could not get CPU Util for %(id)s: %(e)s'),
+                              {'id': instance.id, 'e': err})
diff --git a/ceilometer/compute/pollsters/disk.py b/ceilometer/compute/pollsters/disk.py
index c6f9f776b..b0c2c0426 100644
--- a/ceilometer/compute/pollsters/disk.py
+++ b/ceilometer/compute/pollsters/disk.py
@@ -98,13 +98,12 @@ class _Base(plugin.ComputePollster):
             except NotImplementedError:
                 # Selected inspector does not implement this pollster.
                 LOG.debug(_('%(inspector)s does not provide data for '
-                            ' %(pollster)s'), ({
-                          'inspector': manager.inspector.__class__.__name__,
-                          'pollster': self.__class__.__name__}))
+                            ' %(pollster)s'),
+                          {'inspector': manager.inspector.__class__.__name__,
+                           'pollster': self.__class__.__name__})
             except Exception as err:
-                LOG.warning(_('Ignoring instance %(name)s: %(error)s') % (
-                            {'name': instance_name, 'error': err}))
-                LOG.exception(err)
+                LOG.exception(_('Ignoring instance %(name)s: %(error)s'),
+                              {'name': instance_name, 'error': err})
 
 
 class ReadRequestsPollster(_Base):
@@ -206,13 +205,13 @@ class _DiskRatesPollsterBase(plugin.ComputePollster):
             except NotImplementedError:
                 # Selected inspector does not implement this pollster.
                 LOG.debug(_('%(inspector)s does not provide data for '
-                            ' %(pollster)s'), ({
-                          'inspector': manager.inspector.__class__.__name__,
-                          'pollster': self.__class__.__name__}))
+                            ' %(pollster)s'),
+                          {'inspector': manager.inspector.__class__.__name__,
+                           'pollster': self.__class__.__name__})
             except Exception as err:
                 instance_name = util.instance_name(instance)
-                LOG.error(_('Ignoring instance %(name)s: %(error)s') % (
-                    {'name': instance_name, 'error': err}))
+                LOG.exception(_('Ignoring instance %(name)s: %(error)s'),
+                              {'name': instance_name, 'error': err})
 
 
 class ReadBytesRatePollster(_DiskRatesPollsterBase):
diff --git a/ceilometer/compute/pollsters/memory.py b/ceilometer/compute/pollsters/memory.py
index 43850a72e..9781bb71b 100644
--- a/ceilometer/compute/pollsters/memory.py
+++ b/ceilometer/compute/pollsters/memory.py
@@ -50,5 +50,6 @@ class MemoryUsagePollster(plugin.ComputePollster):
                 LOG.debug(_('Obtaining Memory Usage is not implemented for %s'
                             ), manager.inspector.__class__.__name__)
             except Exception as err:
-                LOG.error(_('Could not get Memory Usage for %(id)s: %(e)s'), (
-                          {'id': instance.id, 'e': err}))
+                LOG.exception(_('Could not get Memory Usage for '
+                                '%(id)s: %(e)s'), {'id': instance.id,
+                                                   'e': err})
diff --git a/ceilometer/compute/pollsters/net.py b/ceilometer/compute/pollsters/net.py
index 5eae80dee..a75d56b0f 100644
--- a/ceilometer/compute/pollsters/net.py
+++ b/ceilometer/compute/pollsters/net.py
@@ -68,10 +68,12 @@ class _Base(plugin.ComputePollster):
         instance_name = util.instance_name(instance)
         return inspector.inspect_vnics(instance_name)
 
-    def _get_rx_info(self, info):
+    @staticmethod
+    def _get_rx_info(info):
         return info.rx_bytes
 
-    def _get_tx_info(self, info):
+    @staticmethod
+    def _get_tx_info(info):
         return info.tx_bytes
 
     def _get_vnics_for_instance(self, cache, inspector, instance):
@@ -105,13 +107,12 @@ class _Base(plugin.ComputePollster):
             except NotImplementedError:
                 # Selected inspector does not implement this pollster.
                 LOG.debug(_('%(inspector)s does not provide data for '
-                            ' %(pollster)s'), ({
-                          'inspector': manager.inspector.__class__.__name__,
-                          'pollster': self.__class__.__name__}))
+                            ' %(pollster)s'),
+                          {'inspector': manager.inspector.__class__.__name__,
+                           'pollster': self.__class__.__name__})
             except Exception as err:
-                LOG.warning(_('Ignoring instance %(name)s: %(error)s') % (
-                            {'name': instance_name, 'error': err}))
-                LOG.exception(err)
+                LOG.exception(_('Ignoring instance %(name)s: %(error)s'),
+                              {'name': instance_name, 'error': err})
 
 
 class _RateBase(_Base):
@@ -126,10 +127,12 @@ class _RateBase(_Base):
         return inspector.inspect_vnic_rates(instance,
                                             self._inspection_duration)
 
-    def _get_rx_info(self, info):
+    @staticmethod
+    def _get_rx_info(info):
         return info.rx_bytes_rate
 
-    def _get_tx_info(self, info):
+    @staticmethod
+    def _get_tx_info(info):
         return info.tx_bytes_rate