从postgresql报错cloud not receive data from WAL stream解决办法:
从:
systemctl stop postgresql
mv /space/postgresqldb/main /space/postgresqldb/main.bak
mkdir /space/postgresqldb/main
chown postgres:postgres /space/postgresqldb/main
chmod 700 /space/postgresqldb/main
/usr/lib/postgresql/12/bin/pg_basebackup -h 10.0.0.2 -U postsync -D /space/postgresqldb/main/ -X stream -P -p 5432
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