13 votes

Referring to an existing resource in CF Template

I recently had to do this for some layered deployments which referenced shared services. In addition to parameters, here are some other options: Named exports: this is a good option if you have some ...
Chris Adams's user avatar
9 votes

Ansible performance issues on a huge group

Increase forks You have significant memory and CPU, so a few hundred forks aka worker threads is reasonable even if it they are heavy on resources. ansible.cfg: [defaults] forks = 350 serial is the ...
John Mahowald's user avatar
3 votes

Ansible performance issues on a huge group

You should try using Mitogen for Ansible, which replaces the host communication part in Ansible with a different approach, and by their words, increases execution speed 1.25x - 7x and decreases CPU ...
Tero Kilkanen's user avatar
3 votes
Accepted

Does Docker Swarm migrate resource hungry containers to other nodes?

Swarm does not move tasks (containers). Its goal there is "do no harm" by moving containers that you didn't explicitly tell it to do so. If you do a service update it will re-create the container, ...
Bret Fisher's user avatar
  • 3,983
3 votes

Pricing of Key Pairs and Security Groups on AWS?

You can See in your AWS Billing Dashboard There no Additional cost of securities group.
Ankit Kumar Rajpoot's user avatar
2 votes

Where are the attributes for room mailbox stored?

I know this is an old question, but I just had to look up the same thing. You can verify that an AD account has become a room mailbox by checking the following attributes: msExchResourceMetaData -> ...
thinknot's user avatar
2 votes
Accepted

How is data centres allocating the correct resources?

Yep, it is just simple big virtualization cluster, nothing special behind it, same as in AWS, GoGrid, rackspace and another cloud providers.
Ondra Sniper Flidr's user avatar
2 votes
Accepted

pthread_create failed (EAGAIN) with most software

Finally found the problem: My hoster is limiting the number of threads to 700 in their OpenVZ config. I can see that in the /proc/user_beancounters. It seems that if numproc goes near 700, these ...
Twometer's user avatar
  • 101
2 votes

Debugging Prometheus OOMkilled despite 6Gi limits

Here are most likely reasons of prometheus eating memory: Overwhelming number of timeseries. Considering background this is most plausable. In prometheus datapoints are taking not much memory ...
Vladimir's user avatar
  • 596
2 votes

nginx - connect() failed upstream under load testing

Already answered here: https://stackoverflow.com/questions/14144396/nginx-proxy-connect-to-ip80-failed-99-cannot-assign-requested-address The message suggests you've run out of local sockets/ports. ...
user2743554's user avatar
1 vote

Pin point performance issue in the past

At least sar from sysstat and atop can record performance metrics and display it on request at later time for analysis. Those are tools local to a server. If you have more servers, it might be more ...
Nikita Kipriyanov's user avatar
1 vote

Debugging Prometheus OOMkilled despite 6Gi limits

The cause of my issue was a broken keycloak deployment in the keycloak namespace. An old keycloak setup was creating an high number of replicasets (around 36000), which caused the high cardinality for ...
Liquid's user avatar
  • 141
1 vote

Postgres process spawns taking up CPU resources

To investigate PostgreSQL processes, consider: Capturing and reviewing more ps output; e.g., ps -eo pid,ppid,user,group,pcpu,pmem,stat,bsdstart,bsdtime,cmd, for example, provides both the ppid and ...
ahi324's user avatar
  • 111
1 vote

Azure Subscription vs. Resource Group Roles & Permissions Clarification

To read or create resources in a resource group, you do not need subscription-wide permissions; they can also be applied just at resource group level. The role that takes precedence is the highest ...
Stefano d'Antonio's user avatar
1 vote

Combining Resources of Multiple Servers

What you are looking for is called single system image clustering. While it is very interesting topic, but not very mature. You can read about it more at https://en.wikipedia.org/wiki/...
Martynas's user avatar
  • 1,251
1 vote

Referring to an existing resource in CF Template

If you know names of your resource, you can build resource ARN by variables and names like this: Queue: !Sub arn:aws:sqs:${AWS::Region}:${AWS::AccountId}:alarms-queue-${Environment}
Jarda Pavlíček's user avatar
1 vote

Making a exchange resource mailbox visible to certain users only

Not easily. You would have to create a new Address Book Policy for everyone - one policy that allows that account to be seen, one that doesn't. Then apply the appropriate policy to each mailbox. If ...
Sembee's user avatar
  • 2,884
1 vote

What resources is incrond using? What can make it stop?

incrond uses the kernel-level inotify subsystem, incapsulating inotify C-based interface in a C++ container. Giving a look at incrond source files, it seems that the error you are facing is related to ...
shodanshok's user avatar
  • 50.7k
1 vote

nginx - connect() failed upstream under load testing

Overview of Network Sockets When a connection is established over TCP, a socket is created on both the local and the remote host. The remote IP address and port belong to the server side of the ...
Mont's user avatar
  • 11
1 vote

Something eats all memory (I suspect memory leak on some app). How to detect what?

I am not a pro at this really, but liquid soap+icecast is multimedia related. When the system is free, it caches and/or occupies memory for future use. And if the traffic increases at a certain time ...
Yash's user avatar
  • 11

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