v0.36.8

CHANGELOG.md

@@ -2,6 +2,14 @@
 
 Release history focused on **features, settings, default behavior, compatibility and fixes**. Changes to internal code structure and preliminary performance experiments are intentionally omitted. Historical descriptions reflect their respective releases; consult the current documentation for the settings available in the latest release.
 
+## 0.36.9 — memory breakdown card and row-based Overview layout
+
+- **Memory breakdown (Overview card, hidden by default):** a new optional `memory_breakdown` dashboard card splits the process RSS into cache data (object bodies), cache bookkeeping (index, keys, headers), cache buffers (fills, COLD queue/IO), free memory held by the allocator (fragmentation, an upper bound), code and mapped files, and the rest of the process. Chips show RSS / cache ratio, cache overhead per object, HOT object count and heap fragmentation; an allocator section lists heap, in-use, free-held and large mmap blocks. An "Outside cache" chart tracks RSS minus accounted cache and, after 10 minutes of samples, labels the trend as stable, rising or falling (with the slope in MiB/h) to tell a leak apart from flat overhead. Enable it in the layout editor.
+- **Status API:** `GET /api/status` (full and `view=live`) adds an additive `memory_allocator` object with glibc `mallinfo2` statistics (`heap_bytes`, `in_use_bytes`, `free_bytes`, `releasable_bytes`, `mmap_bytes`, `mmap_blocks`), sampled at most every 2 seconds; it is `null` on musl, non-Linux and the optional mimalloc build.
+- **Overview layout with row heights:** in a custom (unlocked/saved) layout, card heights now snap to a shared row unit — half the height of the tallest compact stat card, so stat tiles always span two rows and line up — instead of every card in a row stretching to the tallest one. A tall panel (Process, RAM cache, Network…) can sit beside several rows of small cards or charts with aligned edges. Each card automatically gets the rows its content needs; in the layout editor, the new **↕ − / +** control next to the width makes a card taller (`A` marks automatic height, lowering it to the content height returns to automatic). Charts (also with chart scales enabled), chart stacks and tables grow into the extra height, and a card is stretched over the empty cells below it down to the next card or the end of the grid, so rows end on straight edges. **Fill gaps** packs blocks with their real heights. Small content changes (for example a growing table) cannot make the grid jump: a card grows at once but shrinks only after the smaller size is seen several times. Below a 700 px wide dashboard, cards stack by content height as before.
+- **Preferences API:** additive optional `dashboard_widget_heights` (widget ID → 1–32 rows) in `/api/preferences` and dashboard presets. Older documents and presets without it keep automatic heights.
+- **Upgrade notes:** no configuration or database migration is required; existing saved layouts receive the new card hidden at the end. Legacy (never customized) layouts keep their grouped rows until the layout is edited.
+
 ## 0.36.8 — editor forms, toasts and CSP fixes
 
 - **Editor forms:** the `pattern` attribute of generated ID fields (vhost, location, member, listener, stream ID, error fallback target, affinity cookie name) escaped the hyphen incorrectly for browsers that compile patterns with the `v` flag, which logged "Pattern attribute value ... is not a valid regular expression". The hyphen is now escaped.