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The description of autovacuum_max_parallel_workers did not specify where it can be set or how it relates to the per-table autovacuum_parallel_workers storage parameter. Clarify that it can be set only in postgresql.conf or on the server command line, and that the limit can be reduced for individual tables. Add a link to the autovacuum_parallel_workers storage parameter. Backpatch to v19, where parallel autovacuum was introduced. Author: Baji Shaik <baji.pgdev@gmail.com> Reviewed-by: Sami Imseih <samimseih.pg@gmail.com> Reviewed-by: Chao Li <li.evan.chao@gmail.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Discussion: https://postgr.es/m/CA+fm-RMmbUUPWJShxkhoB7SeiQ7XWw3YsVnHpMzp1Y2i_gtwig@mail.gmail.com Backpatch-through: 19