Stats Design

This is a a loosely organized collection of notes and links for the Stats feature design. (Note: this is for the new stats system only - there's an existing legacy system too.)

Stats project team

Table of Contents Table definitions Storing and retrieving statistics Statistics items Collecting statistics Displaying statistics

Table definitions

    PRIMARY KEY (statkeyid), 
    UNIQUE KEY (name) 
)

CREATE TABLE site_stats ( 
    category_id INT UNSIGNED NOT NULL, 
    key_id INT UNSIGNED NOT NULL, 
    insert_time INT UNSIGNED NOT NULL, 
    value INT UNSIGNED NOT NULL, 
 
    -- FIXME: This is good for retrieving data for a single category+key, but 
    -- maybe not as good if we want all keys for the category, with a limit on 
    -- time (ie, last 5 entries, or last 2 weeks). Do we need an extra index? 
    INDEX (category_id, key_id, insert_time) 
)

Storing and retrieving statistics

DW::StatStore

Statistics items

• DW::StatData
• DW::StatData::*

Collecting statistics

This works by massaging, aggregating, and or compiling (as appropriate) data from various places and storing the results using DW::StatStore.

1. etc/stats-collection.conf should contain something like:

## collect and store all stats under the accounts category

hangs if you don't enclose the asterisk in quotes
accounts: "*"
collect and store only these stats under the accounts category

accounts: [ identity, personal, redirect ]

accounts: "*"
active: "*"
paid: "*"

2. bin/worker/stats-collection is the utility that handles stats collection. Run at least once per 24 hours, either from your crontab or by listing it in etc/workers.conf.

3. (only needed if you chose to use etc/workers.conf): add a line to the "all" section reading:

  stats-collection: 1

(note: this is for development only, as it assumes you only have one server - in production environments, you will usually list it in the section for a specific server)

Displaying statistics

• views/stats/site.tt (public stats)
• views/admin/stats.tt (restricted stats)
• DW::Controller::SiteStats.pm (the stats page controller for both public and restricted stats)
• DW::Controller::Graphs.pm (the stats graphs controller for both public and restricted stats)

Category: Development