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Christophe Pettus: All Your GUCs in a Row: multixact_member_buffers and multixact_offset_buffers
Christophe Pettus explains that long transactions holding row locks on thousands of parent rows can cause multixact cache misses and reduce insert throughput. The discussion covers PostgreSQL's `multixact_member_buffers` and `multixact_offset_buffers` settings.