Stack Overflow
Stack Overflow

Questions tagged [downtime]

The term downtime is used to refer to periods when a system is unavailable.

Downtime refers to a period of time that a system fails to provide or perform its primary function.

Reliability, availability, recovery and unavailability are related concepts. The unavailability is the proportion of a time-span that a system is unavailable or offline. This is usually a result of the system failing to function because of an unplanned event, or because of routine maintenance (a planned event).

The term is commonly applied to networks and servers. The term is also commonly applied in industrial environments in relation to failures in industrial production equipment.

Some facilities measure the downtime incurred during a work shift, or during a 12 or 24-hour period. Another common practice is to identify each downtime event as having an operational, electrical or mechanical origin.

The opposite of downtime is uptime.

106 questions
2
votes
1 answer

How to add a column to a table on production PostgreSQL with zero downtime?

Here https://stackoverflow.com/a/53016193/10894456 is an answer provided for Oracle 11g, My question is the same: What is the best approach to add a not null column with default value in production oracle database when that table contain one…
J.J. Beam
  • 2,612
  • 2
  • 26
  • 55
2
votes
1 answer

Prometheus / Grafana count a downtime of service

I have a service metric that returns either some positive value, or 0 in case of failure. I want to count how many seconds my service was failing during some time period. E.g. the expression: service_metric_name == 0 gives me a dashed line in…
Buddy Glass
  • 21
  • 3
2
votes
1 answer

Android Oreo and higher Downtime of Keyevent always 0

In my app i use a receiver to receive the media button clicks of a bluetooth headset. When i log the whole KeyEvent i get the following log: E/KeyEvent: KeyEvent { action=ACTION_UP, keyCode=KEYCODE_MEDIA_PLAY, scanCode=200, metaState=0, flags=0x8,…
Dariusch
  • 171
  • 2
  • 10
2
votes
1 answer

Uptime / Downtime Production Batch Report via SSRS SQL Server 2012 Updated

I am working on another report using SSRS via Visual Studio 2010. I am a rookie with SQL but things are starting to make sense as the weeks go on. Purpose is to create a report that displays the Batch up time / downtime calculated from the…
Jester
  • 21
  • 2
2
votes
3 answers

How to update a docker swarm service with no replication with zero downtime?

I want to update docker swarm service without down-time. The problem is that I don't have enough resources to have service replication. Is there anyway to do this?
Pavan Kishore
  • 91
  • 2
  • 9
2
votes
2 answers

Reasonable Downtime

I run about 5 different hosted servers, through a variety of hosting providers. In the past two months, one of the servers I work on has been down twice. Both times were unexpected and fairly long (36 hours and 4 hours). The server in question is…
Brian Fisher
  • 23,519
  • 15
  • 78
  • 82
2
votes
2 answers

Fail-safe datastore updates on app engine

The app engine datastore, of course, has downtime. However, I'd like to have a "fail-safe" put which is more robust in the face of datastore errors (see motivation below). It seems like the task queue is an obvious place to defer writes when the…
David Underhill
  • 15,896
  • 7
  • 53
  • 61
2
votes
0 answers

How can I trace the downtime reported by Newrelic

I am getting downtime alert for web application with different failure messages. these all are 2-3 mins downtime. This downtime is random 2-3 times in a day. failure messages problem parsing the HTTP response, no further detail…
Raghvendra Parashar
  • 3,883
  • 1
  • 23
  • 36
2
votes
2 answers

How to lock down a web application for maintenance without loss of unsaved work?

I have a large web application in ASP .NET (not that the technology matters here) that does not currently have a way to be locked down for maintenance without current users losing their work. Since I have not implemented something like this before,…
Raheel Khan
  • 14,205
  • 13
  • 80
  • 168
1
vote
1 answer

Trigger Downtime programmatically using ResourceTaskStart .startTask(Agent)

In my model I have a Resource Pool representing an equipment, which has a downtime defined by a Downtime block. The Downtime is defined by triggers and sends its tasks to a flowchart. Besides the standard Downtime procedure I want to trigger a…
Sebastian Melchior
  • 35
  • 4
1
vote
2 answers

Kubernetes Autoscaler: no downtime for deployments when downscaling is possible?

In a project, I'm enabling the cluster autoscaler functionality from Kubernetes. According to the documentation: How does scale down work, I understand that when a node is used for a given time less than 50% of its capacity, then it is removed,…
Rodrigo Boos
  • 111
  • 7
1
vote
1 answer

Is there a way to let LB route traffic to host once it become healthy?

I have two ec2 instances behind an application load balancer, I'm trying to update application on host by host (Rolling update). To do that i follow those steps : 1. stop nginx sevice 2. update application 3. start nginx service by stopping nginx…
Chawki
  • 189
  • 2
  • 12
1
vote
1 answer

Rolling update strategy not giving zero downtime in live traffic

I'm using rolling update strategy for deployment using these two commands: kubectl patch deployment.apps/ -n -p '{\"spec\":{\"template\":{\"metadata\":{\"labels\":{\"date\":\"`date +'%s'`\"}}}}}' kubectl apply -f…
Antra Verma
  • 31
  • 6
1
vote
2 answers

How to replace load balancer Docker container with no downtime in a simple way

I'm running around 30 different sites on the same host, each managed using docker-compose. Some of them use Nginx, some use Apache. Then there's a reverse proxy container exposed to the internet which runs Nginx, has a bunch of vhosts and will…
157 239n
  • 349
  • 3
  • 15
1
vote
5 answers

PHP Calculation 'downtime'

I've made an program in PHP that stores in a MySQL database when it's working. The table that shows whether the program is working or not looks like this: Table_name: downtime Working(int) Time(datetime) 1 2011-05-06 15:18:55 0 …
Simon
  • 5,464
  • 6
  • 49
  • 85
1 2
3
4 5 6 7 8