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Texture RAM copies: break down the boosted bucket; face-less textures held whole (terrain detail textures) #706

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opened 2026-10-12 10:15:13 +00:00 by sky_line · 1 comment

sky_line commented

2026-10-12 10:15:13 +00:00

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Measured with Prefer disk cache on: reusable copies drained (253 -> 31 MB) but ~990 MB stayed:

boosted 525 MB (UI, avatar bakes, own avatar, previews, sculpt, map...)
pinned by the renderer 50 MB (projectors / particles / water / sky)
on-screen, still uploading 90 MB
never driven by the Vulkan renderer 105 MB

Never driven: the samples are a region's 4 terrain detail textures (2048x1024 / 2048x2048, no faces, not boosted, held ~55 min). LL decodes them at 2048^2 for the minimap terrain composite and then unboosts them; they are never GPU images under Vulkan. The idle-thumbnail path skipped every texture with no faces (to protect undrawn UI images), so they stayed whole for the session.

Fix (done locally): face-less, never-driven, unboosted, idle textures thumbnail after 4x the normal idle time; a UI image that draws later is re-sharpened by the existing path.

Next: a log breakdown of the boosted bucket by boost type (bakes / UI / sculpt / map / selected / other) to size the work in the lease ticket.

Measured with Prefer disk cache on: reusable copies drained (253 -> 31 MB) but ~990 MB stayed: - boosted 525 MB (UI, avatar bakes, own avatar, previews, sculpt, map...) - pinned by the renderer 50 MB (projectors / particles / water / sky) - on-screen, still uploading 90 MB - never driven by the Vulkan renderer 105 MB **Never driven:** the samples are a region's 4 terrain detail textures (2048x1024 / 2048x2048, no faces, not boosted, held ~55 min). LL decodes them at 2048^2 for the minimap terrain composite and then unboosts them; they are never GPU images under Vulkan. The idle-thumbnail path skipped every texture with no faces (to protect undrawn UI images), so they stayed whole for the session. - **Fix (done locally):** face-less, never-driven, unboosted, idle textures thumbnail after 4x the normal idle time; a UI image that draws later is re-sharpened by the existing path. **Next:** a log breakdown of the boosted bucket by boost type (bakes / UI / sculpt / map / selected / other) to size the work in the lease ticket.

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2026-10-12 10:15:13 +00:00

sky_line added this to the Slipstream project

2026-10-12 10:15:13 +00:00

sky_line referenced this issue

2026-10-12 10:15:18 +00:00

Texture RAM copies only while a feature holds a lease; GPU + disk tiers otherwise #707

sky_line referenced this issue

2026-10-12 11:17:23 +00:00

[Epic] Cache rewrite: segment store, compression, tiered texture caching, disk-aware sizing #715

sky_line referenced this issue from a commit

2026-10-12 12:33:14 +00:00

#706: idle face-less textures thumbnail their CPU copy (terrain detail textures held whole)

sky_line commented

2026-10-12 15:12:23 +00:00

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Shipped in 1.3.0 Beta 7: idle textures with no faces (terrain detail textures) no longer keep a full-size copy in RAM. The boosted copies were handled by #707.

sky_line

2026-10-12 15:12:23 +00:00

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