现象:数据库服务及监听运行正常,但打开功能模块非常慢;
处理过程:
一 检查数据库alert_oaxx.log日志
日志切换并不高,无报错;数据库负载不大;
二 检查数据库状态
服务和监听均运行正常,sqlplus / as sysdba登陆正常,会话数正常 .
检查系统启动时间
初始安装日期: 2015/5/13, 12:09:51
系统启动时间: 2018/6/14, 3:11:06
检查网络连接,发现大量close_wait,由进程327000引起,经判断为360tray

TCP    10.25.136.5:52667      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52668      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52669      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52672      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52674      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52675      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52676      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52677      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52678      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52680      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52681      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52682      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52683      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52684      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52686      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52688      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52690      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52691      221.130.200.53:80      CLOSE_WAIT      327000
TCP    10.25.136.5:52692      221.130.200.53:80      CLOSE_WAIT      327000

三 检查数据库等待事件
无等待 ;
四 做tnsping发现:

C:\Users\Administrator>tnsping oadb
TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 08-5月 -
2019 15:05:04
Copyright (c) 1997, 2010, Oracle.  All rights reserved.
已使用的参数文件:
Y:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
已使用 TNSNAMES 适配器来解析别名
尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST =10.xx.1xx.5)(PORT = 15
22)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = oadb)))
OK (51910 毫秒)

延迟很高,停用360tray

C:\Users\Administrator>tnsping oadb
TNS Ping Utility for 64-bit Windows: Version 11.2.0.1.0 - Production on 08-5月 -
2019 14:58:23
Copyright (c) 1997, 2010, Oracle.  All rights reserved.
已使用的参数文件:
Y:\oracle\product\11.2.0\dbhome_1\network\admin\sqlnet.ora
已使用 TNSNAMES 适配器来解析别名
尝试连接 (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = WIN-5K0CGNM3EQV)(PORT
 = 1522)) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = oadb)))
OK (24950 毫秒)

降至25秒,但还是很高,ping 主机,发现延迟很低,禁用ipv6,效果还是一样;
C:\Users\Administrator>ping 10.25.136.5

正在 Ping 10.25.136.5 具有 32 字节的数据:
来自 10.25.136.5 的回复: 字节=32 时间<1ms TTL=64
来自 10.25.136.5 的回复: 字节=32 时间<1ms TTL=64
另发现应用日志存在网络连接超时

url=jdbc:oracle:thin:@10.2x.1x6.x:xxx:oadb;user=bxxx;pwd=xxx
java.sql.SQLException: Io 异常: Connection refused(DESCRIPTION=(TMP=)(VSNNUM=186
646784)(ERR=12505)(ERROR_STACK=(ERROR=(CODE=12505)(EMFI=4))))
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:189)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:231)

检查sqlnet.ora无明显异常;
五 检查数据库监听,重启监听,无改善,查看监听日志发现,日志在2019-04-06 2 点以后无更新
产生有大量trace:

** DBGRL Error: Text Alert Log
** DBGRL Error: SLERC_OERC, 48184
** DBGRL Error: OSD-00002: 附加错误信息
O/S-Error: (OS 87) 参数错误。
** DBGRL Error: 06-4月 -2019 02:01:39 * (CONNECT_DATA=(SID=xxdb)(CID=(PROGRAM=)(HOST=__jdbc__)(USER=oracle))) * (ADDRESS=(PROTOCOL=tcp)(HOST=1xxxxx)(PORT=60839)) * establish * oadb * 0
Trace file y:\oracle\diag\tnslsnr\WIN-5K0CGNM3EQV\listener\trace\ora_895324_893720.trc
** DBGRL Error: Text Alert Log
** DBGRL Error: SLERC_OERC, 48184
** DBGRL Error: OSD-00002: 附加错误信息
O/S-Error: (OS 87) 参数错误。
** DBGRL Error: 系统参数文件为Y:\oracle\product\11.2.0\dbhome_1\network\admin\listener.ora

查看listner.log发现其有4GB,在win 下存在如下问题:
WINDOWS: Listener Hangs & Lsnrctl Commands Are Slow or Hang (文档 ID 1319797.1)
Bug 9879101 : THE CONNECT THROUGH LISTENER WAS SLOW WHEN LISTNER LOG GROWED 4GB
处理办法:
1 停上监听,重命名原监听文件,
y:\oracle\diag\tnslsnr\WIN-5K0CGNM3EQV\listener\trace\ listener.bak.log
新建一个listener.log