how to calculate downtime

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Script for monitoring server downtime:$ Sudo VI ping. ShPress a or I to enter the editing mode.#! /Bin/bashDate = 'date + % m % d % y'Touch/log/ping/$ date. LogServer = "ming1 ming2 ming3 ming4 ming5"For server in $ ServerDoPing = '/bin/ping-C 4 $ server | grep % | awk-f [: ""] +' {print $6} '| tr-d' %''Ping2 = '/bin/ping-C 4 $ server | grep % | awk-f [: ""] +' {print $8} '| tr-d' %''If [$ Ping-EQ "0"]ThenEcho "$ server is OK">/log/ping/$ date. LogEli

Tags: c + + database MySQLBrief scenario:1. At the beginning of the mail alarm, the DB process memory is more than 5G.2. DB outage after 1 hours3. Check the log and find that MySQL statement execution is slow. A log warning appears starting 18:30.Wrote a program to test the speed of the database execution. Even the native database executes 1000 statements, time 500ms or so. Even the other machine database executes 1000 statements, Time 8s or so. The server's database execution thread 500ms execu

Oracle Trace File Analyzer (TFA) Collector. 2017/01/11 03:05:29 Clsrsc-363:user ignored prerequisites during installation OLR initialization-successful2017/01/11 03:06:43 clsrsc-330:adding clusterware entries to file ' oracle-ohasd.conf ' Crs-4133:oracle High Availability Services have been stopped.Crs-4123:oracle High Availability Services have been started.Crs-4133:oracle High Availability Services have been stopped.Crs-4123:oracle High Availability Services have been started.crs-2791:startin

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. seriously suspect that there is a bad fast in the 12 disk, a group of RAID volumes that have been working for a long period of time to produce bad lanes in areas that are not read or that have been read in the past is good because they have not been read and written, so the controller appears to be fine. The most direct hazard of this bad track is in the rebuild process. When a piece of physical hard problems, generally consider rebuild,rebuild is to do full synchronization, those bad word w

When we accidentally set the scheduled maintenance time for hosts and services in batches, how can we delete them in batches? The following is a script to easily handle the problem ~~~ #! /Bin/bash# Eg:#./Del_downtime.sh 877 885 hosts# Delete the settings of Scheduled Host Downtime from 877 to 885 in the maintenance plan under System -- Downtime#./Del_downtime.sh 886 894 services# Delete the settings of Sc

The customer's database (RAC environment: 11.1.0.6) encountered abnormal instance downtime, accompanied by a ORA-07445 error: The customer's database (RAC environment: 11.1.0.6) encountered abnormal instance downtime, accompanied by a ORA-07445 error: Symptom:The customer's database (RAC environment: 11.1.0.6) encountered abnormal instance downtime, accompan

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. Therefore 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 star

This time write in Chinese, express clearly.Recently saw a few procedures, combined with their own thinking, give the Golang service its graceful shutdown processing way. The HTTP server is described here as an object.Here the "elegance", indicating that the server has a plan, step-by-step exit. Specifically, it terminates the connection with the client, closes the process of other activities, threads, and completes the release of the resource; complete log.1. ClassificationServer outages can be

0. Overview:In general, in order to improve the game speed, the online player's data will be cached in memory. If there are data updates, only the cached data in memory is updated, rather than updating the database directly. The cached data is periodically written back to the database (for example, 5-minute writes). When the server goes down, all the data from the last database update to the outage will be lost, the so-called back file. This part of the data will never be returned, usually after

This article mainly introduces the most secure restart method for Linux server downtime. I can see that this method has shocked the small Editor. I need to press 9 keys at the same time, which is a bit dizzy. read this article ~ Although the Linux kernel is known as a "non-dead family", it will almost never crash or crash, but in special circumstances, there is still a chance that it will crash. Because Linux is widely used in production environments

The Linux volume management downtime recovery company recently recruited a DBA, which is definitely called a rare one in a hundred years. let's refer to it as a wonderful one! The director is very keen on and looks forward to him, so he specified the wonderful solution to implement the three-phase database resizing. Next I will share with you how to perform O M )... information Linux volume management downtime