Memory problems on high IO

[odinuv]

Things seem to behave like they cannot allocate memory when a worker is under heavy load:

https://keboola.slack.com/archives/C31U6BGJC/p1523279547000200

https://github.com/keboola/sliced-files-packer/issues/1
#220
https://github.com/keboola/processor-skip-lines/issues/12
https://github.com/keboola/connection/issues/1048

[ondrejhlavacek]

ještě by to mohlo souviset s https://docs.docker.com/engine/reference/run/#kernel-memory-constraints

[ondrejhlavacek]

https://github.com/keboola/syrup-router/issues/118