其中,单用户模式(single-user mode)是PostgreSQL数据库支持的一种特殊运行模式,顾名思义,即只允许一个超级用户访问数据库系统,其他用户连接会被拒绝。这种模式除了可以在initdb阶段使用外,还多用于数据库维护和紧急恢复等特殊场景,可以认为是Postgres的一种应急模式。 二、单用户模式的使用场景 1.数据库
ERROR: database is not accepting commands to avoid wraparound data loss in database "testdb" 建议:Stop the postmaster and vacuum that database in single-user mode. You might also need to commit or roll back old prepared transactions, or drop stale replication slots 报错信息信息显示,数据库发...
oldest_datname), errhint("Stop the postmaster and vacuum that database in single-user mode.\n" "You might also need to commit or roll back old prepared transactions, or drop stale replication slots."))); else ereport(ERROR, (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), errmsg("database is ...
pg_hba.conf #host DATABASE USER ADDRESS METHOD [OPTIONS] #hostssl DATABASE USER ADDRESS METHOD [OPTIONS] #hostnossl DATABASE USER ADDRESS METHOD [OPTIONS] client 强制使用或不使用ssl的方法 psql "sslmode=require" psql "sslmode=disable" 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. ...
ERROR:database is not accepting commands to avoid wraparound data lossindatabase"xxdb"HINT:Stop the postmaster and vacuum that databaseinsingle-user mode 所以冻结过程应该在平时不断地自动做而不是等到事务号需要回卷的时候才去做。这时就需要引入一个参数:vacuum_freeze_min_age(默认5000万),当冻结过程...
errhint("Stop the postmaster and vacuum that database in single-user mode.\n" "You might also need to commit or roll back old prepared transactions, or drop stale replication slots."))); else ereport(ERROR, (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), ...
Database isn't accepting commands to avoid wraparound data loss in database 'xx' Stop the postmaster and vacuum that database in single-user mode. 备注 此错误消息是长期监督。 通常不需要切换到单用户模式。 相反,可以运行所需的 VACUUM 命令并执行优化以使 VACUUM 快速运行。 虽然你不能运行任何数据...
HINT: Stop the postmaster and vacuum that database in single-user mode. You might also need to commit or roll back old prepared transactions. 问题分析 这个报错是由于,|最新事务号-最老事务号| = 2^31-1000000,即当前可用的 xid 仅剩下一百万的时候,内核就会禁止实例写入并报错:database is not acc...
示例值:{ "migrationMode": "single-db", "defaultLocale": "zh_CN", "serverCollationName": "sql_latin1_general_cp1250_ci_as" } NetworkAccessList Array of NetworkAccess 实例网络信息列表(此字段已废弃)注意:此字段可能返回 null,表示取不到有效值。 SupportIpv6 Integer 实例是否支持Ipv6: 0:否 1...
cd /data01/pg12_8002/pg_data vi postgresql.conf # 相比主配置,修改如下: port = 8002 primary_conninfo = 'hostaddr=127.0.0.1 port=3389 user=rep123' # 不用设置密码, 因为主设置了trust访问。 hot_standby = on wal_receiver_status_interval = 1s wal_receiver_...