vLLM adds Hybrid HiSparse offloading to keep GLM 5.3 decoding past GPU memory
vLLM Blog · rss · 2026-09-08
The vLLM blog details new GLM 5.3 inference optimizations: HiSparse is integrated as a pressure-driven memory tier that composes with the Hybrid Memory Allocator and KV offloading. When a request's KV cache no longer fits in GPU memory, decoding continues instead of stalling, keeping concurrency high.
- HiSparse acts as a memory tier triggered by memory pressure, not a fixed config
- Composes with KV offloading to avoid decode interruptions
- Goal: sustain high concurrency under KV overflow
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