- Increased .col-auth width from 4em to 5em to prevent truncation
- Changed Volumes tooltip to generic "hover for breakdown" since
volume names are autodiscovered
- Added explanatory tooltips to all 9 column headers in Activity Monitor
- Added sortable Auth column showing NativeAuthenticator authorization status
- Green checkmark for authorized users, red X for not authorized
- Backend queries users_info table with graceful fallback
- Updated documentation with new column and API schema
- Activity tooltip shows "Not enough data (Nh of 24h collected)" until
sufficient samples collected (144 samples at 10-min intervals)
- Progress bar still renders to show emerging trend, tooltip clarifies
percentage not yet reliable
- Added activitymon_sample_interval to template_vars for frontend access
- Rewrote docs/activity-tracking-methodology.md as comprehensive
implementation specification covering data collection, scoring formulas,
UI components, API endpoints, and design rationale
Added JUPYTERHUB_ACTIVITYMON_TARGET_HOURS env var (default 8) to
normalize activity scores based on expected daily work hours.
- Raw score (% of sampled time active) normalized to target
- 8h/day worker with 33% raw score -> 100% normalized
- Progress bar capped at 5 segments (100%)
- Tooltip shows real % with "(>8h/day)" indicator if over 100%
Files: Dockerfile, settings_dictionary.yml, jupyterhub_config.py,
activity.html
Threshold-based coloring (green/yellow/red) doesn't work for
multi-core systems where CPU usage can exceed 100% (e.g., 6400%
on 64-core machines). Now displays plain text values.
- Activity Monitor now shows all users with historical activity, not just active servers
- Badge changed from "X active servers" to "X users (Y active)" format
- Status column now sortable (green > amber > red priority)
- Default sort changed to status descending with secondary sort by username
- Moved inline table styles to CSS classes using em units
- Added .activity-table, .settings-table, .notifications-table classes
- Simplified Activity page subtitle
- Remove "Measured X ago" timer display (adds no value)
- Change auto-refresh interval from 30s to 10s for real-time monitoring
- Add JUPYTERHUB_ACTIVITYMON_RESOURCES_UPDATE_INTERVAL env var (default 10s)
- Resource refresh updates status, CPU, memory, timers only
- Activity sampling is separate (controlled by background process)
- Remove formatTimeAgo function and related timestamp tracking
- Add clickable column sorting for User, CPU, Memory, Time Left, Last Active
- Sorting cycles: descending -> ascending -> none (default)
- Sort icons show current direction
- Last Active now shows full words ("8 minutes ago", "4 months ago")
- Proper singular/plural handling for time units
- "Measured X ago" now updates every second (shows 5s ago, 3min ago, etc.)
- Last Active column left-aligned and shows rounded times (5min, 2h, 3d)
- Removed redundant minutes/hours from time display
- ActivityMonitor now uses /data/activity_samples.sqlite instead of
JupyterHub's main database to avoid SQLite locking conflicts
- Fixes "database is locked" errors that prevented login when both
JupyterHub and ActivityMonitor wrote simultaneously
- Added "Last Active" column to activity table showing relative time
- Redesign activity bar as thin continuous bar (80x8px) with subtle dividers
- Fix inconsistent timestamp text ("Last updated" vs "Measured")
- Fix sample cleanup to always run on record_sample(), not just on inserts
- Ensures samples older than RETENTION_DAYS are properly pruned
- Add ActivitySample SQLAlchemy model for database persistence
- Add ActivityMonitor singleton with scoring, reset, lifecycle methods
- Add JUPYTERHUB_ACTIVITYMON_INACTIVE_AFTER env var (default 60 min)
- Update defaults: SAMPLE_INTERVAL=600s, RETENTION_DAYS=7
- Fix score calculation to use measured samples only (not theoretical max)
- Add 3-state status: green (active), yellow (inactive), red (offline)
- Add recently_active field in API response
- Add Reset button with confirmation dialog
- Fix green color (explicit #28a745 instead of text-success)
- Add ThreadPoolExecutor for non-blocking Docker stats
- Remove old background sampler code (on-demand sampling now)
- Bump version to 3.7.0
