处于prepared状态的事务尚未完成，既可以保证提交成功，也可以回滚事务。原因是数据修改已经在事务日志里更新好，离事务提交只差一个CommitTransactionRecord；另一方面如果需要回滚事务，也只需要写一个AbortTransactionRecord即可，或者发生故障进入xlog recovery阶段再次写入AbortTransactionRecord。如果COMMIT PREPARED过程中遭遇磁...
(errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE), errmsg("cannot acquire lock mode %s on database objects while recovery is in progress", lockMethodTable->lockModeNames[lockmode]), errhint("Only RowExclusiveLock or less can be acquired on database objects during recovery."))); 1. 2. 3...
voidInitWalSender(void){am_cascading_walsender=RecoveryInProgress();InitWalSenderSlot();/* Create a per-walsender data structure in shared memory */MarkPostmasterChildWalSender();SendPostmasterSignal(PMSIGNAL_ADVANCE_STATE_MACHINE);/* Initialize empty timestamp buffer for lag tracking. */lag_track...
(locktag->locktag_type==LOCKTAG_OBJECT|| locktag->locktag_type==LOCKTAG_RELATION)&& lockmode>RowExclusiveLock) ereport(ERROR, (errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE), errmsg("cannot acquire lock mode %s on database objects while recovery is in progress", lockMethodTable->lockMode...
走读代码:postmaster守护进程fork出postgres后,在InitPostgres阶段StartTransaction()函数根据是否RecoveryInProgress来赋值,如果RecoveryInProgress()为true就设置XactReadOnly=true /* * Make sure we've reset xact state variables * * If recovery is still in progress, mark this transaction as read-only. ...
automatic recovery in progress")));if(recoveryTargetTLI>ControlFile->checkPointCopy.ThisTimeLineID)// 如果指定了目标时间线,且目标时间线比当前时间线大,打logereport(LOG,(errmsg("crash recovery starts in timeline %u and has target timeline %u",ControlFile->checkPointCopy.ThisTimeLineID,recoveryTargetTL...
2020-04-28 11:43:51.633 HKT [5088] FATAL: the database system is starting up2020-04-28 11:43:53.580 HKT [2372] LOG: database system was not properly shut down; automatic recovery in progress2020-04-28 11:43:53.668 HKT [2372] LOG: redo starts at 0/49FA3DD02020-04-28 11:43:...
关键变化: 增加了Windows平台支持,加入了Point-in-time recovery功能。 10. PostgreSQL 8.1(2005年) 关键变化: 添加了角色管理和表空间支持。 11. PostgreSQL 8.3(2008年) 关键变化: 增加了Heap-Only Tuples(HOT)和UUID类型支持。 12. PostgreSQL 9.0(2010年) ...
-P,同--progress,显示进度; -D,输出到指定目录; -R 创建一个recovery.conf文件,10版本后就没有该文件,改为standby.signal文件,需要自己创建,所以该参数可以省略 如果报错: pg_basebackup: error: could not connect to server: could not connect to server: No route to host Is the server running on hos...
问Postgresql启动错误：“无法刷新脏数据:输入/输出错误”EN介绍数据恢复案例前照例先介绍故障服务器的物理状况。本次数据恢复的服务器是linux操作系统，某品牌730系列服务器，MD3200系列存储。导致数据丢失的原因是机房意外断电导致系统无法正常启动，客户管理员对无法访问的服务器进行了修复操作后进入系统查看数据，服务器...