Move documentation files to their place in the hierarchy; update SUMMARY.md github/anoa/doc_hierarchy anoa/doc_hierarchy

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/development/internal_documentation/room_and_user_statistics.md b/docs/development/internal_documentation/room_and_user_statistics.md
new file mode 100644

index 0000000000..cc38c890bb
--- /dev/null
+++ b/docs/development/internal_documentation/room_and_user_statistics.md
@@ -0,0 +1,22 @@
+Room and User Statistics
+========================
+
+Synapse maintains room and user statistics in various tables. These can be used
+for administrative purposes but are also used when generating the public room
+directory.
+
+
+# Synapse Developer Documentation
+
+## High-Level Concepts
+
+### Definitions
+
+* **subject**: Something we are tracking stats about – currently a room or user.
+* **current row**: An entry for a subject in the appropriate current statistics
+    table. Each subject can have only one.
+
+### Overview
+
+Stats correspond to the present values. Current rows contain the most up-to-date
+statistics for a room. Each subject can only have one entry.