2017年8月24日
16:38
环境：oracle 11.2.0.1 OEL-5.8
注：以下操作都在备库执行
总结方法：
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1、FPYJ(125_7)@fpyj123> select open_mode from v$database; OPEN_MODE -------------------- READ ONLY WITH APPLY --证明开启 RTA 2、FPYJ(125_7)@fpyj123> select DEST_ID,DEST_NAME,RECOVERY_MODE from v$archive_dest_status where RECOVERY_MODE <>'IDLE'; DEST_ID DEST_NAME RECOVERY_MODE ---------- ------------------------------------------------------------------------------------------------------------------------------------------- 1 LOG_ARCHIVE_DEST_1 MANAGED --RECOVERY_MODE为MANAGED REAL TIME APPLY --证明开启了 RTA |
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请确认以下参数： FPYJ(125_7)@fpyj123> col value for a100 FPYJ(125_7)@fpyj123> col name for a20 FPYJ(125_7)@fpyj123> select name,value from v$parameter where name in ('log_archive_dest_1','log_archive_dest_2'); NAME VALUE -------------------- ---------------------------------------------------------------------------------------------------- log_archive_dest_1 location=/home/oracle/arch_dir/fpyj123 valid_for=(all_logfiles,all_roles) db_unique_name=fpyj123 log_archive_dest_2 service=fpyj sync lgwr valid_for=(all_logfiles,all_role) db_unique_name=fpyj log_archive_dest_1 配置如下：VALID_FOR 一定是 all_logfiles,all_roles 不然无法 RTA FPYJ(125_7)@fpyj> alter system set log_archive_dest_1='LOCATION=/home/oracle/arch_dir/fpyj VALID_FOR=(all_logfiles,all_roles) db_unique_name=fpyj' scope=spfile; |
未开启real time apply ，以下操作打开的备库的RTA
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SYS(139_22)@fpyj123> select open_mode from v$database; OPEN_MODE -------------------- READ ONLY SYS(139_22)@fpyj123> select process,client_process,status,thread#,sequence#,block#,blocks from v$managed_standby; PROCESS CLIENT_P STATUS THREAD# SEQUENCE# BLOCK# BLOCKS --------- -------- ------------ ---------- ---------- ---------- ---------- ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CLOSING 1 63 1 421 RFS N/A IDLE 0 0 0 0 RFS LGWR IDLE 1 64 123 1 RFS UNKNOWN IDLE 0 0 0 0 --没有MRP0 进程哦，不能RTA 开启real time apply 物理DG开启RTA命令如下： SYS(139_22)@fpyj123> alter database recover managed standby database using current logfile disconnect from session; Database altered. 再次检查MRP进程 SYS(139_22)@fpyj123> select process,client_process,status,thread#,sequence#,block#,blocks from v$managed_standby; PROCESS CLIENT_P STATUS THREAD# SEQUENCE# BLOCK# BLOCKS --------- -------- ------------ ---------- ---------- ---------- ---------- ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CONNECTED 0 0 0 0 ARCH ARCH CLOSING 1 63 1 421 RFS N/A IDLE 0 0 0 0 RFS LGWR IDLE 1 64 221 1 RFS UNKNOWN IDLE 0 0 0 0 MRP0 N/A APPLYING_LOG 1 64 221 102400 --redo apply情况 SQL> select open_mode from v$database; OPEN_MODE -------------------- READ ONLY WITH APPLY
SYS(139_22)@fpyj123> col DEST_NAME for a20 SYS(139_22)@fpyj123> set linesize 1000 SYS(139_22)@fpyj123> set pagesize 1000 col dest_name for a20 SQL> select DEST_ID,DEST_NAME,RECOVERY_MODE from v$archive_dest_status where recovery_mode not like 'IDLE' ; DEST_ID DEST_NAME RECOVERY_MODE ---------- -------------------- ----------------------- 1 LOG_ARCHIVE_DEST_1 MANAGED REAL TIME APPLY
红色部分证明standby database 开启了real time apply |