# MTLResidencySet requestResidency postponement under cross-app pressure > No source measures how often or how long Metal postpones a residency request when a second app holds GPU memory. The search for this concept returned only general sizing articles. Parent: [Mac local LLMs: Memory and wired limits](https://llms-explorer.com/tree/mac-local-llms-memory-and-wired-limits/) · 1 facets · 2 facts · page: https://llms-explorer.com/tree/mtlresidencyset-requestresidency-postponement-un/ ## Facts - No source measures how often or how long Metal postpones a residency request when a second app holds GPU memory. The search for this concept returned only general sizing articles. — source: `asserted` - The concept is already covered by macos-memory-compressor-thrashing-from-gpu-visib.md, metal-residency-sets-and-llama-cpp-metal-internals.md and metal-mmap-span-mapping-and-residency-set-wiring.md; the batch-9 pass found no further primary source and no contradiction. — source: `asserted`