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Previously, the idle_replication_slot_timeout parameter used minutes as its unit, based on the assumption that values would typically exceed one minute in production environments. However, this caused unexpected behavior: specifying a value below 30 seconds would round down to 0, effectively disabling the timeout. This could be surprising to users. To allow finer-grained control and avoid such confusion, this commit changes the unit of idle_replication_slot_timeout to seconds. Larger values can still be specified easily using standard time suffixes, for example, '24h' for 24 hours. Back-patch to v18 where idle_replication_slot_timeout was added. Reported-by: Gunnar Morling <gunnar.morling@googlemail.com> Author: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: Laurenz Albe <laurenz.albe@cybertec.at> Reviewed-by: David G. Johnston <david.g.johnston@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Hayato Kuroda <kuroda.hayato@fujitsu.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CADGJaX_0+FTguWpNSpgVWYQP_7MhoO0D8=cp4XozSQgaZ40Odw@mail.gmail.com Backpatch-through: 18