Fix lvcache_ plugin

* add config for write_miss statements
* turn all the counters into derive and set min to 0 to prevent negative
  spikes (per the documentation)

diff --git a/debian/changelog b/debian/changelog
index dae773da0f6790f534861a161feefb3aa789d8b3..dc05edaffb259ac2014b25b9219c7d6751f3b154 100644 (file)
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,4 +1,4 @@
-munin-plugins-local (0.10~test.0) UNRELEASED; urgency=medium
+munin-plugins-local (0.10~test.1) UNRELEASED; urgency=medium
 
   * Add lvmcache_ plugin, for graphing lvm cache state 
 

diff --git a/plugins/lvmcache_ b/plugins/lvmcache_
index c3430b14aea12e77a148e4e97eff1d621ebbf795..218a2912bfbc1b9adc4770aa7e85d96a8dd00ee0 100755 (executable)
--- a/plugins/lvmcache_
+++ b/plugins/lvmcache_
@@ -54,16 +54,32 @@ graph_args --base 1024 -l 0
 graph_scale yes
 blks_total.label Total blocks
 blks_total.draw LINE1
+blks_total.type DERIVE
+blks_total.min 0
 blks_used.label Used blocks
 blks_used.draw LINE1
+blks_used.type DERIVE
+blks_used.min 0
 blks_read_hit.label Cache read hits
 blks_read_hit.draw LINE1
+blks_read_hit.type DERIVE
+blks_read_hit.min 0
 blks_read_miss.label Cache read misses
 blks_read_miss.draw LINE1
+blks_read_miss.type DERIVE
+blks_read_miss.min 0
 blks_write_hit.label Cache write hits
 blks_write_hit.draw LINE1
+blks_write_hit.type DERIVE
+blks_write_hit.min 0
+blks_write_miss.label Cache write hits
+blks_write_miss.draw LINE1
+blks_write_miss.type DERIVE
+blks_write_miss.min 0
 blks_dirty.label Dirty blocks
 blks_dirty.draw LINE1
+blks_dirty.type DERIVE
+blks_dirty.min 0
 EOF
 }