I am working with an iMac 27" (iMac 12,2) and I have switched from OS X to Debian as I got unacceptable performance issues with boot2docker (Apparently coming from the mulitple FS layers).
As I’m using Fig, it doesn’t took too much time to switch from OS X to Debian. Now running
fig up or running my test suite is fast as expected.
Now my issue is that sometimes, when I run a command, Docker is super slow.
For instance, I’m developing a Rails application and I needed to rebuild my database with
rake db:drop db:create db:setup. Usually this is taking something like a seconde but this time it 5 to 6 minutes as all queries were slow.
But then in the case I run again the same command, it takes a second doing excately the same thing.
Finaly when I run my test suite and I look at the resources usage, the processes are not taking more than 15% of a CPU core.
So here are my questions:
- Is it possible that running
htopon the host is not showing the real CPU usage of the container processes ?
- Is there anything I could check in order to find a solution ?
- What could be the reason of this behavior ?
Thank you in advance.