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An example of solution to system downtime caused by full archiving logs of Oracle databases When the first downtime occurs, the system memory overflows. Therefore, the application server is restarted and an error is reported when the application server is started. The error is that the Oracle database cannot be connected. Connect to the database server, open EM, and the system reports an error.The error me

In the morning, I suddenly received a notification about the downtime of dnspod ).The server reached 85% at AM. Uptime indicates that the CPU usage reaches 35. Don't go down.Based on previous experience, it should trigger a CPU-consuming processing, restart PHP-CGI to restore immediately, and then view the log.OK immediately after restart.View the log and call up the log at that time point one by one, focusing on the response time. The normal processi

The steps to minimize Oracle downtime are discussed here. All forms of downtime-planned or unplanned-always occur, and a DBA should have the right backup strategy so that it can recover more quickly if there is a problem with the database. The following are the assumptions of the backup strategy and the operating conditions of the database The control file is mirrored Database running in Archivelog mode

Label:We sometimes need to check whether MySQL is down or not, and if it goes down, you should automatically restart the app and notify the OPS staff!This script is simple to implement the MySQL after the downtime of automatic restart and mail notification operations, this is the shell script, of course, some friends like to use the implementation of Python, the principle is the same!The main use here is that the command is mysqladmin ping . #!/bin/ba

The company has a relatively old server, apache/2.0.59 (Unix) php/5.1.2 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: [Tue Feb 14 14:49:28 2012] [Wa

This article mainly introduced to prevent server downtime of the MySQL data loss of several scenarios, combined with the practice of replication and monitor and failover these three projects, the use of friends can refer to the For most applications, MySQL is the most critical data storage center, so how to let MySQL provide ha services, we have to face a problem. When Master is in the machine, how do we ensure that the data as far as possible, how t

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/MPATHFSudo/usr/sbin/oracleasm Createdisk DSK03/DEV/MAPPER/MPATHGSudo/usr/sbin/oracleasm Createdisk Dsk04/dev/mapper/mpathhSudo/usr/sbin/oracleasm Createdisk Dsk05/dev/mapper/mpathiSudo/usr/sbin/oracleasm Createdisk DSK06/DEV/MAPPER/MPATHJSudo/usr/sbin/oracleasm Createdisk DSK07/DEV/MAPPER/MPATHKSudo/usr/sbin/oracleasm ListdisksSudo/usr/sbin/oracleasm-discoverRun the below on other nodes:Sudo/usr/sbin/oracleasm ScandisksSudo/usr/sbin/oracleasm ListdisksSudo/usr/sbin/oracleasm-discoverAbout the p

1. These days in the customer's side of the newly installed Windows R2 Enterprise Edition for the financial server use, the above installation of SQL Server and Oracle 11G, find activation tools to activate the operation for a week did not find problems, work this morning to find the system down, After restarting the query system log found that Wlms.exe began to shut down the power for the client computer, looked up some relevant information found that the service is a license calibration servic

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