postgres control
作者：互联网
PostgreSQL控制文件内容：
主要分为是三部分，初始化静态信息、WAL及检查点的动态信息、一些配置信息。
我们可以用过pg_controldata命令直接读取PostgreSQL控制文件内容：
pg_controldata -D /usr/local/pgsql/data/
pg_control version number: 1201
Catalog version number: 201909212
Database system identifier: 7070399126203274461
Database cluster state: in production
pg_control last modified: 2022年03月03日 星期四 16时05分17秒
Latest checkpoint location: 0/30285A8
Latest checkpoint's REDO location: 0/3028570
Latest checkpoint's REDO WAL file: 000000010000000000000003
Latest checkpoint's TimeLineID: 1
Latest checkpoint's PrevTimeLineID: 1
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 0:492
Latest checkpoint's NextOID: 24577
Latest checkpoint's NextMultiXactId: 1
Latest checkpoint's NextMultiOffset: 0
Latest checkpoint's oldestXID: 479
Latest checkpoint's oldestXID's DB: 1
Latest checkpoint's oldestActiveXID: 492
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 1
Latest checkpoint's oldestCommitTsXid:0
Latest checkpoint's newestCommitTsXid:0
Time of latest checkpoint: 2022年03月03日 星期四 16时05分14秒
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: off
max_connections setting: 100
max_worker_processes setting: 8
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: 8192
Blocks per segment of large relation: 131072
WAL block size: 8192
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 1996
Size of a large-object chunk: 2048
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 0
Mock authentication nonce: 7caec5ec07a28b0960e4aa161a9b36f70c0b55de04b26e2e6ebc98148da72d5b
标签：control,03,postgres,1Latest,per,checkpoint,setting,location 来源： https://www.cnblogs.com/jinhao2/p/15961147.html