how to calculate downtime

Database downtime migration oracle10g instance1. Operation 1.1 of the original database view original configuration 1.1.1 view User Permissions View user system permissions: SQL> select * from user_sys_privs; View User Roles SQL> select * from user_role_privs; View the permissions of the current session SQL> select * from session_privs; PRIVILEGE ---------------------------------------- CREATE SESSION UNLIMITED TABLESPACE CREATE TABLE CREATE CLUSTER C

) { AStaticloginfo.setresultcode ("1"); at Throwe; -}Catch(smshttpstatusexception e) { -Staticloginfo.setresultcode ("1"); - Throwe; -}finally { - in Reqlogger.info (staticloginfo); - } to } + The solution is to release connection in finally:finally { if(getmethod!=null) { getmethod.releaseconnection (); } Reqlogger.info (Staticloginfo); }and increase the maximum number of connections:Httpc

Symptom:The customer's database (RAC environment: 11.1.0.6) encountered abnormal instance downtime, accompanied by a ORA-07445 error:Sun Jun 23 01:00:06 2013Exception [type: SIGSEGV, Address not mapped to object] [ADDR: 0xF] [PC: 0x755773D, kcbw_get_bh () + 67]Errors in file/oracle/app/11gR1/diag/rdbms/xij/xij1/trace/xij1_mman_2015.trc (incident = 298938 ):ORA-07445: exception encountered: core dump [kcbw_get_bh () + 67] [SIGSEGV] [ADDR: 0xF] [PC: 0x7

The SureHA cluster server is retained (restarted after downtime), as shown in the following figure:Cause analysis:In the SureHA software, the automatic recovery is set to "off", as shown in the figure below. After the server is restarted, it will be retained (restarted after the server is down.Note: the cluster is directly restarted on the management page, and the server is not retained.Solution:On the SureHA management page, select the serv

script report 10.12.30.12 ping failure, open a new SSH session, quickly execute multiple arp-an, see. Also really IP conflict!!!! The same IP address, two times see the MAC address is not the same. Did the old machine recover itself?　　　　　　11, again check the old machine Remote management card, physical machine operating system, virtual machine operating system, is still not connected. But the problem is definitely on the old machine.12, verification 11 of the idea, because the remote management

/bootRestart Success, enter the long-lost login interface, enter the system# tune2fs-l/dev/sda1 |grep ' uuid ' query system UUIDManually write a query to the UUID sequence number/etc/fstabs/dev/sda1:uuid= "xxxxxxxxx"/BootReboot, success.8. SummaryThis failure is caused by a sudden power outage or reboot that causes the system UUID to be inconsistent because the UUID is the only flag for each systemSteps1 single Mode2 mount-o remount RW,/3 Vim/etc/fstabsRemove or change the UUID of the mounted di

The practice of gracefulUse the endless library to implement, such as Access gin:r: = gin. Default () r.get ("/", index) endless. Listenandserve (":", R)We write a handler function with a specified time-out:Func index (c *gin. Context) { Duration:= c.query ("duration") Durationint, _:= StrConv. Atoi (Duration) * Time . Second) c.string (http. Statusok, duration)}Curl http://localhost:3000/?duration=10When using CTRL + C at the time of the test, all requests will be processed to exit

Solution Ideas:1. Log in from the libraryMysql-uroot-p123456-s/application/mysql-5.6.20/mysql.sock2. Stop slave ServiceMysql>stop slave;3. Fully backup the synchronized data from the library or the main library, and determine the synchronization file and synchronization locationMysqldump-uroot-p123456-s/application/mysql-5.6.20/mysql.sock-a-B--events|gzip >/opt/rep.sql.gz4. Pour the data into the library#gunzip Rep.sql.gz>rep.sql#mysql-uroot-p ' pwd123 '-s/application/mysql-5.6.20//mysql.sock 5.

Database downtime migration oracle10g instance and oracle10g migration1. Operation 1.1 of the original database view original configuration 1.1.1 view User Permissions View user system permissions: SQL> select * from user_sys_privs; View User Roles SQL> select * from user_role_privs; View the permissions of the current session SQL> select * from session_privs; PRIVILEGE ---------------------------------------- CREATE SESSION UNLIMITED TABLESPACE CREAT

No downtime xtrabackup create slave node, xtrabackupslaveMaster: 10.1.1.17: 3306 slave: 10.1.1.18: 3307slave node complete basic environment configuration: Create mysql users, install mysql software of the same version, xtrabackup software package, create directory, configure script1. Create a full backup: master [mysql @ master1 backup] $ innobackupex -- defaults-file =/data/mysqldata/3306/my. cnf -- user = xtrabk -- password = 'onlybackup'/backup/ba

Linux server downtime Case 2: linux case An email alert showed that a Linux server in an overseas factory could not be connected, and the DPA (Database Performance Analyzer) system also found a problem. ping the server to find that the Network was disconnected and the local system administrator could not be contacted, after email consultation, the system administrator also found that there was a problem and restarted directly. Afterwards, the system a

/wkiol1ubc9riinniaaqhyl4nrq0013.jpg "width=" "height=" 347 "alt=" Wkiol1ubc9riinniaaqhyl4nrq0013.jpg "/>At this point, we have roughly found the cause of this tomcat outage, the rest is to give the report to the boss, the work behind is developed, you can see because the code or application infinite loop caused by memory leaks, and then tuning the JVM is meaningless.Iv. SummaryThe above is only for you encounter this kind of problem of operation and maintenance of children's shoes some ideas, if

In the deployment of a set of intranet test environment, frequent downtime, after the boot constantly eat memory, restart Apache memory consumption will continue to rise until swap run out, until the crash, due to the intranet environment, server concurrency and pressure are very small. Check the Apache error log for a large number of similar errors: Copy Code code as follows: [Tue Feb 14 14:49:28 2012] [Warn] child process 7751 still

DNA applications encounter many problems when they are implemented. In this article you will see. NET is how to make improvements in this area. by Barry Bloom Technology involved: Visual Studio. NET, asp.net,. NET Framework, Application Center 2000 There is nothing more difficult than preventing a failure in the process of software implementation, and these failures can lead to downtime. I'm sure your developers have told you that the programs they de

I. Purpose and direction 1, Domino upgrade is mainly Domino System program and user data maintenance two aspects of upgrading 2, Domino System program upgrade time is mainly Windows and Domino installation time 3, the user data maintenance is mainly copy recovery data and data maintenance (fixup, convent, etc.) 4, mainly consider whether the data maintenance time can be compressed, so as to upgrade the non-stop machine or as short as possible to upgrade