supabase / supabase / 26035695875

72%

push

github

fix(studio): improve memory and swap units in DB reports (#45889)

Fixes [DEBUG-94](https://linear.app/supabase/issue/DEBUG-94)

## Summary

- **Min MB units**: Added \`formatBytesMinMB\` helper that always
formats byte values in at least MB. Applied to RAM and swap y-axis tick
formatters, tooltips, and chart headers.
- **Swap chart scale**: Every Supabase compute instance is provisioned
with **1 GB of swap regardless of size** (per
[docs](https://supabase.com/docs/guides/troubleshooting/memory-and-swap-usage-explained-aPNgm0)),
so the swap y-axis always shows at least 0 to 1 GB. Low swap usage no
longer fills the full chart height. Removed the show/hide limit toggle
since the limit is implicit in the y-axis scale.
- **Swap units in header/tooltip**: Fixed all three formatters (initial
header, hover-sync header, tooltip) to use \`formatBytesMinMB\` for swap
so the value always shows a unit like "2.00 MB".
- **Reference-line defensive fix**: Added a \`customValue\` fallback in
\`useAttributeQueries\` so future reference-line attributes that use
\`customValue\` instead of \`value\` are not silently overwritten to 0.

## Test plan

- [ ] Open DB Reports and verify RAM/Swap y-axis labels show MB (or GB
for large values), never KB or bytes
- [ ] Hover a bar in the swap chart and verify tooltip and header show
the same value with a unit (e.g. "2.00 MB")
- [ ] With low or zero swap usage, the chart bars are flat and the
y-axis goes 0 to 1 GB
- [ ] CPU chart limit toggle still renders at 100% (regression check on
the \`useAttributeQueries\` fallback change)

🤖 Generated with [Claude Code](https://claude.ai/claude-code)

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

965 of 1364 branches covered (70.75%)

Branch coverage included in aggregate %.

1 of 5 new or added lines in 1 file covered. (20.0%)

1485 of 2051 relevant lines covered (72.4%)

240.39 hits per line