tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index d9c2dd62b43f580b82e97832591fe4c50d2336dd..5ca711eae8dde90113cb0f3eb6c008fcf825aa81 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -13279,6 +13279,31 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.DatabaseAdvancedMetricsTime">

[rkaplow, 2015/08/05 15:24:18]

units="milliseconds"

[Alexander Yashkin, 2015/08/06 07:15:11]

Done.

+  <owner>sky@chromium.org</owner>
+  <summary>
+    Time spent on advanced History metrics calculation. Advanced metrics are
+    logged on initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.DatabaseBasicMetricsTime">

[rkaplow, 2015/08/05 15:24:18]

units="milliseconds"

[Alexander Yashkin, 2015/08/06 07:15:10]

Done.

+  <owner>sky@chromium.org</owner>
+  <summary>
+    Time spent on basic History metrics calculation. Basic metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.DatabaseFileMB">

[rkaplow, 2015/08/05 15:24:18]

units="MB"

[Alexander Yashkin, 2015/08/06 07:15:10]

Done.

+  <owner>sky@chromium.org</owner>
+  <summary>
+    Size of History DB in MB. Duplicate of Profile.HistorySize and
+    Sqlite.SizeKB.History. Logged on initialization of the History DB on 1% of
+    starts.
+  </summary>
+</histogram>
+
 <histogram name="History.DeleteFTSIndexDatabases">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
@@ -13368,6 +13393,31 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.MonthlyHostCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of unique hosts visited within last month. Metrics are logged on

[rkaplow, 2015/08/05 15:24:18]

 Unique hostnames in History database urls table with last-visit times in the
    last 30 days, collected at startup.

Can keep the last part about when logged.

[Alexander Yashkin, 2015/08/06 07:15:10]

Done.

+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.MonthlyURLCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of urls visited within last month. Metrics are logged on

[rkaplow, 2015/08/05 15:24:18]

Unique URLs in History database urls table with last-visit times in the last
    30 days, collected at startup.

[Alexander Yashkin, 2015/08/06 07:15:10]

Done.

+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.MonthlyVisitCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of records in History visits table that were added in interval
+    between one month ago and one week ago. Metrics are logged on initialization
+    of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
 <histogram name="History.NumFaviconBitmapsInDB">
   <owner>rogerm@chromium.org</owner>
   <summary>
@@ -13484,6 +13534,46 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="History.URLTableCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of records in urls table in History DB. Metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.VisitTableCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of records in visits table in History DB. Metrics are logged on
+    initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyHostCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of unique hosts visited within last week. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyURLCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of urls visited within last week. Metrics are logged on
+    initialization of the History DB on 0.3% of starts.
+  </summary>
+</histogram>
+
+<histogram name="History.WeeklyVisitCount">
+  <owner>sky@chromium.org</owner>
+  <summary>
+    Number of records in History visits table that were added in last week.
+    Metrics are logged on initialization of the History DB on 1% of starts.
+  </summary>
+</histogram>
+
 <histogram name="HistoryPage.ClickPosition">
   <owner>rpop@google.com</owner>
   <summary>
@@ -42559,6 +42649,13 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Error codes returned by sqlite for the history db.</summary>
 </histogram>
 
+<histogram name="Sqlite.Migration.History" units="ms">

[rkaplow, 2015/08/05 15:24:18]

milliseconds is more common

[Scott Hess - ex-Googler, 2015/08/05 21:43:51]

Sqlite.* is generally stuff coming from sql/ implementation.  I think this
should go into History.* somewhere.

[Alexander Yashkin, 2015/08/06 07:15:10]

Done.

+  <owner>sky@chromium.org</owner>
+  <summary>
+    Time used to migrate History database schema to a new version.
+  </summary>
+</histogram>
+
 <histogram name="Sqlite.OpenFailure" enum="SqliteErrorCode">
   <owner>shess@chromium.org</owner>
   <summary>Error which prevented database open.</summary>