Merge pull request #4 from frhwang/hit-ratio

added stats for keyspace hit ratio

README.md

@@ -78,6 +78,7 @@ killall -9 redis-stat-daemon
 
 ## Contributors
 - [Chris Meisl](https://github.com/cmeisl)
+- [Hyunseok Hwang](https://github.com/frhwang)
 
 ## Contributing
 

lib/redis-stat.rb

@@ -290,6 +290,14 @@ def process_how info, prev_info, key
       end
     end
 
+    get_ratio = lambda do |x, y|
+      if x > 0 && y > 0
+        x / (x + y) * 100
+      else
+        0
+      end
+    end
+
     case key
     when :at
       val = Time.now.strftime('%H:%M:%S')
@@ -310,6 +318,16 @@ def process_how info, prev_info, key
     when :used_memory, :used_memory_rss, :aof_current_size, :aof_base_size
       val = info.sumf(key)
       [humanize_number(val.to_i, true), val]
+    when :keyspace_hits_ratio
+      hits = info.sumf(:keyspace_hits)
+      misses = info.sumf(:keyspace_misses)
+      val = get_ratio.call(hits, misses)
+      [humanize_number(val), val]
+    when :keyspace_hits_ratio_per_second
+      hits = get_diff.call(:keyspace_hits) || 0
+      misses = get_diff.call(:keyspace_misses) || 0
+      val = get_ratio.call(hits, misses)
+      [humanize_number(val), val]
     else
       val = info.sumf(key)
       [humanize_number(val), val]

lib/redis-stat/constants.rb

@@ -33,8 +33,8 @@ class RedisStat
       :evicted_keys_per_second,
       :keyspace_hits_per_second,
       :keyspace_misses_per_second,
+      :keyspace_hits_ratio_per_second,
       :aof_current_size,
-      :pubsub_channels,
     ],
     :verbose => [
       :at,
@@ -56,6 +56,8 @@ class RedisStat
       :keyspace_hits,
       :keyspace_misses_per_second,
       :keyspace_misses,
+      :keyspace_hits_ratio,
+      :keyspace_hits_ratio_per_second,
       :aof_current_size,
       :aof_base_size,
       [:rdb_changes_since_last_save, :changes_since_last_save],
@@ -84,6 +86,8 @@ class RedisStat
     :keyspace_hits_per_second            => [:magenta, :bold],
     :keyspace_misses                     => [:magenta],
     :keyspace_misses_per_second          => [:magenta],
+    :keyspace_hits_ratio                 => [:magenta],
+    :keyspace_hits_ratio_per_second      => [:magenta],
     :aof_current_size                    => [:cyan],
     :aof_base_size                       => [:cyan],
     :rdb_changes_since_last_save         => [:green, :bold],
@@ -111,6 +115,8 @@ class RedisStat
     :keyspace_hits_per_second            => 'hit/s',
     :keyspace_misses                     => 'mis',
     :keyspace_misses_per_second          => 'mis/s',
+    :keyspace_hits_ratio                 => 'hit%',
+    :keyspace_hits_ratio_per_second      => 'hit%/s',
     :aof_current_size                    => 'aofcs',
     :aof_base_size                       => 'aofbs',
     :rdb_changes_since_last_save         => 'chsv',

lib/redis-stat/version.rb

@@ -1,3 +1,3 @@
 class RedisStat
-  VERSION = "0.3.2"
+  VERSION = "0.3.3"
 end