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fix(compress): drop and recreate mempalace_compressed to avoid HNSW link_lists.bin inflation #1273

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fix(compress): drop and recreate mempalace_compressed to avoid HNSW link_lists.bin inflation #1273

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9 changes: 9 additions & 0 deletions mempalace/cli.py
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Original file line number Diff line number Diff line change
Expand Up @@ -902,6 +902,15 @@ def cmd_compress(args):
# Store compressed versions (unless dry-run)
if not args.dry_run:
try:
# Drop and recreate the compressed collection on each run.
# Repeated upserts in chromadb 1.5.8 cause the HNSW link_lists.bin
# sparse file to grow without GC; rebuilding the index from scratch
# each compress run keeps disk size proportional to entry count.
# See #1092 for the broader concurrent-writer report.
try:
backend.delete_collection(palace_path, "mempalace_compressed")
except Exception:
pass
comp_col = backend.get_or_create_collection(palace_path, "mempalace_compressed")
for doc_id, compressed, meta, stats in compressed_entries:
comp_meta = dict(meta)
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