21 April 2014

The Ruby Reflector

Topic

Uptime

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By Todd Hoff of High Scalability 4 months ago.
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Host Color for your webhosting needs? Redundant network, 100% Uptime SLA guarantee. Excellent location and high class data center. Powerful resource-rich, server systems. 24/7 Support - responsive, friendly and knowledgeable. Scalable, fairly priced, risk-free and hosting service.

LogicMonitor is the cloud-based IT performance monitoring solution that enables companies to easily and cost-effectively monitor their entire IT infrastructure stack - storage, servers, …

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By Leigh Shevchik of New Relic 2 years ago.
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With a self-imposed goal of 99.9% uptime, the company makes specific plans for March's huge traffic spike. New Relic's application performance monitoring tool is a critical part of these efforts. Bleacher Report depends on New Relic to achieve its performance goals and meet unexpected demand as traffic surges around breaking news stories.

" New Relic is the core of our performance monitoring with a large screen up in our development and operations room to monitor our …

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By Assaf Arkin of Labnotes 4 months ago.
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The 4 Keys to 100% Uptime with Node.js

amscanne/huptime a "utility for zero downtime restarts of unmodified programs". Extracts the zero-downtime feature of supervirors like Up and Unicorn , but language agnostic.

None of the Above

Product Hunt is "a daily leaderboard of the best new products". No ads or blabber. And since we're celebrating winter: on-demand snow plows , cocktails delivered to your …

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By New Relic of New Relic over 1 year ago.
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Better Uptime Than Ever

Thanks in large part to New Relic, FIT Radio now delivers better uptime than ever. "Our uptime is basically 99.999%," says Ringersma. "Prior to New Relic, we were maybe at 98%. Customers notice that. Best of all, we no longer rely on users to perform site monitoring for us — and that goes a long way toward improving customer satisfaction."

Read the Full Case Study

To find out how New Relic helped FIT Radio cut its troubleshooting …

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By Mark of Heroku almost 2 years ago.
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Uptime numbers for the last month: At the top, you'll see uptime numbers for the previous month. This provides an at-a-glance answer to the question of "How stable has Heroku been lately?" Our numbers here haven't been as good as we'd like in the last few months, but by posting them publicly here we intend to create the transparency and accountability that will help drive us to improve. After all, you make what you measure .

Timeline: Most status sites, including …

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Check whether the Uptime variable is too small, indicating the server has been restarted

Check whether Threads connected is approaching max_connections, which can be inconvenient to solve in some environments

However, there's no reason not to use the plugin for other purposes if you want. Here are some of the things you could do:

Compare a counter to a threshold

Compare a counter to a variable or another counter

Add, subtract, multiply, and divide counters or variables

Transform …

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…much more serious. You can use the pmp-check-mysql-status plugin to alert when the server's Uptime variable is too small.

The server is approaching max_connections. Overflowing the max_connections setting is a bit like a lack of disk space: it is possible for it to be slowly approached over time, and then to begin causing problems when connections are rejected. Similarly to deadlocks and timeouts, applications often don't handle or log this error appropriately. The pmp-check-mysql-status …

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By Assaf of Labnotes 2 years ago.
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Scale The Amazon whitepaper on running MongoDB on AWS is full of good info. Nothing earth shattering, just not anything you want to learn the trial & error way.

Yields Interesting read about co-routines, generators and JavaScript: Why coroutines won't work on the web .

Worth repeating Life would be simpler if GET, PUT and DELETE were all, always, idempotent .

Uptime Turns out morning people and nightowls show different brain function :

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On Scout ~ The Blog 3 years ago.
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PID : 26049 Sessions: 20 Processed: 2977 Uptime: 2h 53m 55s

There is a 20 session backlog for the process above: it looks like we need to increase the number of Passenger processes.

Tuning Passenger

As I mentioned earlier, Passenger is likely to be the biggest consumer of memory in your web stack. It requires some special attention. Take a look at our previous post: Production Rails Tuning with Passenger: PassengerMaxProcesses for instructions on tuning Passenger. …

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By 0x4a6f4672 of 4 Lines of Code 4 years ago.
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…false otherwise. It can be used for example if you want to know how long the server has been running. Uptime is a Unix/ Linux command to do this: >> system "uptime" 15:39:41 up 5:11, 3 users, load average: 0.13, 0.27, 0.35 => true

Another example is to get the amount of free space on your hard disks. In this case you could use df (disk free) to display the amount of available disk space: >> system "df -h" Filesystem Size Used Avail Use% Mounted …

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