如何重启dg中 LNS/RFS进程

郑全

今天遇到一个问题,发现主库不往备库发送日志了,检查主库日志状态:
LOG_ARCHIVE_DEST_2  ERROR create archive failed 23:5602

检查报警日志文件当前信息,并没有抱错.

不过,trace当时确实有错:
,检查trace文件:
*** 2016-08-01 23:51:53.736
krsb_bcb_get: Error 272 performing stall for 1 BCB I/O completion check
*** 2016-08-01 23:51:53.736 2961 krsi.c
krsi_dst_fail: dest:2 err:272 force:0 blast:1
kcrrwkx: unknown error:272
*** 2016-08-01 23:52:00.565
FAL[server]: Selected inactive destination; resetting temporarily
Redo shipping client performing standby login
*** 2016-08-01 23:52:00.612 4681 krsu.c
Logged on to standby successfully
Client logon and security negotiation successful!
*** 2016-08-01 23:52:04.874
FAL[server]: FAL archival, archive destination LOG_ARCHIVE_DEST_2 made inactive: File close error
*** 2016-08-01 23:52:04.874 2961 krsi.c
以为是备库空间有问题,检查发现,空间只有100g左右,按理说现在应该没有问题,再把备库日志做了部分处理,主库依然没有向备库写日志,

上网搜文档,看到一篇文档问题和我的一样,重新修改log_archive_dest_state_2=defer,然后,再去修改为enable,就可以.
之后去修改,确实难得一见的lns进程又出现了.

LNS: Standby redo logfile selected for thread 1 sequence 126536 for destination LOG_ARCHIVE_DEST_2
   Thu Aug 04 22:53:35 2016
ARC4: Archive log rejected (thread 1 sequence 126230) at host 'STDBYTNS'
FAL[server, ARC4]: FAL archive failed, see trace file.
ARCH: FAL archive failed. Archiver continuing
ORACLE Instance orcl1 - Archival Error. Archiver continuing.
  Thu Aug 04 22:55:47 2016

但过了没有多久,看到报警日志文件中,又有了归档错误:

ARC8: Archive log rejected (thread 1 sequence 126234) at host 'STDBYTNS'
FAL[server, ARC8]: FAL archive failed, see trace file.
ARCH: FAL archive failed. Archiver continuing
ORACLE Instance orcl1 - Archival Error. Archiver continuing.

察看日志:
Logged on to standby successfully
Client logon and security negotiation successful!
Error 16401 creating standby archive log file at host 'STDBYTNS'

经检查,发现主库的log_archive_dest_2是这样设置的:
log_archive_dest_2                   string      service=STDBYTNS NOAFFIRM max_
                                                 failure=10 max_connections=5 r
                                                 eopen=180 valid_for=(online_lo
                                                 gfiles,primary_role) db_unique
                                                 _name=stdby
SQL> show parameter fal
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
fal_client                           string      primarytns
fal_server                           string      STDBYTNS

备库的fal设置:

SQL> show parameter fal
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
fal_client                           string      primarytns
fal_server                           string      STDBYTNS
备库和主库一样了,备库的fal_client的值,应该和主库的service=STDBYTNS 一样才对.

SQL> alter system set fal_client=STDBYTNS ;   
System altered.
SQL> alter system set fal_server=primarytns;
System altered.

修改后,发现指到主库的连接串primarytns对应的ip为某一个节点,修改为scanip

修改前:
[dbserver1::/u01/app/oracle/product/11.2.0/db_1/network/admin]$cat tnsnames.ora
STDBYTNS =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = dbserver1)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = stdby)
    )
  )
primarytns =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.202)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
      (INSTANCE_NAME = orcl2)
    )
  )

修改后:
primarytns =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.10.100)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

发现,修改后,还有这种错误,再查看log_archive_max_processes=10,应该是以前还记得,修改为1个,然后再修改为4个,即可.
如果有条件,最好重起一下主备库.

附/etc/hosts文件:

# public network (eth0)
192.168.10.201    rac01
192.168.10.202    rac02
192.168.10.221    rac03
192.168.10.222    rac04
#private network
180.180.0.1      rac01-priv
180.180.0.2      rac02-priv
180.180.0.3      ra03-priv
180.180.0.4      ra04-priv
#vip
192.168.10.101   rac01-vip
192.168.10.102   rac02-vip
192.168.10.103   rac03-vip
192.168.10.104   rac04-vip
#scan
192.168.10.100  rac-scan
192.168.10.91   dbserver1