读取控制文件，找到哪个文件是可以被清理的
$ pg_controldata /pgdata/5433
pg_control version number: 1201
Catalog version number: 201909212
Database system identifier: 6924185130379164934
Database cluster state: in production
pg_control last modified: Thu 22 Dec 2022 03:00:09 PM CST
Latest checkpoint location: 3D3/7FB3EAF0
Latest checkpoint's REDO location: 3D2/FA9A1638
Latest checkpoint's REDO WAL file: 00000003000003D2000000FA
Latest checkpoint's TimeLineID: 3
Latest checkpoint's PrevTimeLineID: 3
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 0:398293544
Latest checkpoint's NextOID: 49156
Latest checkpoint's NextMultiXactId: 1
Latest checkpoint's NextMultiOffset: 0
Latest checkpoint's oldestXID: 199658550
Latest checkpoint's oldestXID's DB: 16389
Latest checkpoint's oldestActiveXID: 398293537
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 16389
Latest checkpoint's oldestCommitTsXid:0
Latest checkpoint's newestCommitTsXid:0
Time of latest checkpoint: Thu 22 Dec 2022 02:56:39 PM CST
Fake LSN counter for unlogged rels: 0/3E8
Minimum recovery ending location: 0/0
Min recovery ending loc's timeline: 0
Backup start location: 0/0
Backup end location: 0/0
End-of-backup record required: no
wal_level setting: replica
wal_log_hints setting: on
max_connections setting: 4000
max_worker_processes setting: 28
max_wal_senders setting: 10
max_prepared_xacts setting: 0
max_locks_per_xact setting: 64
track_commit_timestamp setting: off
Maximum data alignment: 8
Database block size: 16384
Blocks per segment of large relation: 65536
WAL block size: 16384
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 4044
Size of a large-object chunk: 4096
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 1
Mock authentication nonce: 12e75f147694c5cbba620c4fb46b45b9b6d19b5e778fd025d448a3f24249f4bb
从上面得到 00000003000003D2000000FA之前的可以删除，执行：
pg_archivecleanup -d /pgdata/wal_archive_5433 00000003000003D2000000FA
