标签云
asm恢复 bbed bootstrap$ dul In Memory kcbzib_kcrsds_1 kccpb_sanity_check_2 MySQL恢复 ORA-00312 ORA-00607 ORA-00704 ORA-00742 ORA-01110 ORA-01555 ORA-01578 ORA-01595 ORA-08103 ORA-600 2131 ORA-600 2662 ORA-600 3020 ORA-600 4000 ORA-600 4137 ORA-600 4193 ORA-600 4194 ORA-600 16703 ORA-600 kcbzib_kcrsds_1 ORA-600 KCLCHKBLK_4 ORA-15042 ORA-15196 ORACLE 12C oracle dul ORACLE PATCH Oracle Recovery Tools oracle加密恢复 oracle勒索 oracle勒索恢复 oracle异常恢复 Oracle 恢复 ORACLE恢复 ORACLE数据库恢复 oracle 比特币 OSD-04016 YOUR FILES ARE ENCRYPTED 勒索恢复 比特币加密文章分类
- Others (2)
- 中间件 (2)
- WebLogic (2)
- 操作系统 (103)
- 数据库 (1,745)
- DB2 (22)
- MySQL (75)
- Oracle (1,592)
- Data Guard (52)
- EXADATA (8)
- GoldenGate (24)
- ORA-xxxxx (162)
- ORACLE 12C (72)
- ORACLE 18C (6)
- ORACLE 19C (15)
- ORACLE 21C (3)
- Oracle 23ai (8)
- Oracle ASM (68)
- Oracle Bug (8)
- Oracle RAC (54)
- Oracle 安全 (6)
- Oracle 开发 (28)
- Oracle 监听 (28)
- Oracle备份恢复 (583)
- Oracle安装升级 (95)
- Oracle性能优化 (62)
- 专题索引 (5)
- 勒索恢复 (84)
- PostgreSQL (29)
- pdu工具 (5)
- PostgreSQL恢复 (9)
- SQL Server (30)
- SQL Server恢复 (11)
- TimesTen (7)
- 达梦数据库 (2)
- 生活娱乐 (2)
- 至理名言 (11)
- 虚拟化 (2)
- VMware (2)
- 软件开发 (37)
- Asp.Net (9)
- JavaScript (12)
- PHP (2)
- 小工具 (20)
-
最近发表
- 虚拟机故障引起ORA-00310 ORA-00334故障处理
- pg创建gbk字符集库
- PostgreSQL运行日志管理
- ora-600 kdsgrp1 错误描述
- GAM、SGAM 或 PFS 页上存在页错误处理
- ORA-600 krhpfh_03-1208
- VMware勒索加密恢复(vmdk勒索恢复)
- ORA-39773: parse of metadata stream failed故障处理
- sql数据库备份失败—失败: 23(数据错误(循环冗余检查)
- vmdk文件被加密恢复(虚拟机文件加密)
- 差点被误操作的ORA-600 kcratr_nab_less_than_odr故障
- win平台19c 打patch遭遇2个小问题汇总
- pg单个数据库目录恢复-pdu恢复单个数据库目录数据
- pg删除数据恢复—pdu恢复pg delete数据
- .[OnlyBuy@cyberfear.com].REVRAC勒索mysql恢复
- 表dml操作权限授权给public,导致只读用户失效
- 21c数据库恢复遭遇ora-600 ktugct: corruption detected
- pg_control丢失/损坏处理
- 当前主流数据库版本服务支持周期-202503
- pg启动报invalid checkpoint record处理
标签归档:sqlplus dns
19c sqlplus / as sysdba 登录慢分析
sqlplus / as sysdba登录非常慢
[oracle@xifenfei trace]$ date Fri Oct 29 00:04:27 CST 2021 [oracle@xifenfei trace]$ sqlplus / as sysdba<< EOF > exit; > EOF SQL*Plus: Release 19.0.0.0.0 - Production on Fri Oct 29 00:04:28 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 [oracle@xifenfei trace]$ date Fri Oct 29 00:04:49 CST 2021
sqlpus 一个简单的登录+退出使用了22秒,严重的慢,通过strace分析发现访问以下两个ip,但是10.11.0.41非常慢,10.13.0.41很快,并且通过一些信息53端口,判断可能是dns服务器的ip
connect(9, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("10.13.0.41")}, 16) = 0 connect(12, {sa_family=AF_INET, sin_port=htons(53), sin_addr=inet_addr("10.11.0.41")}, 16) = 0
进一步确认,确认是该服务器配置的dns服务器
[root@xifenfei ~]# cat /etc/resolv.conf # Generated by NetworkManager nameserver 10.13.0.41 nameserver 10.11.0.41
对这两个ip的连通性进行测试
[root@xifenfei ~]# ping 10.13.0.41 PING 10.13.0.41 (10.13.0.41) 56(84) bytes of data. 64 bytes from 10.13.0.41: icmp_seq=1 ttl=126 time=0.616 ms ^C --- 10.13.0.41 ping statistics --- 1 packets transmitted, 1 received, 0% packet loss, time 0ms rtt min/avg/max/mdev = 0.616/0.616/0.616/0.000 ms [root@xifenfei ~]# ping 10.11.0.41 PING 10.11.0.41 (10.11.0.41) 56(84) bytes of data. ^C --- 10.11.0.41 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2063ms [root@xifenfei ~]#
确认10.11.0.41 ip不通,对于此类问题最快的解决方案就是除掉不可使用的dns服务器,然后测试登录和退出时间
[oracle@xifenfei trace]$ date Fri Oct 29 00:21:12 CST 2021 [oracle@xifenfei trace]$ sqlplus / as sysdba<< EOF > exit; > EOF SQL*Plus: Release 19.0.0.0.0 - Production on Fri Oct 29 00:21:12 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. date Connected to: Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 SQL> Disconnected from Oracle Database 19c Enterprise Edition Release 19.0.0.0.0 - Production Version 19.3.0.0.0 [oracle@xifenfei trace]$ date Fri Oct 29 00:21:13 CST 2021
通过除掉不可用的dns服务器ip之后,测试时间为1s,恢复正常