Just ran into this problem on a Ubuntu 16.04.2 server, the check-new-
release process occupied the whole disk, causing 99+% iowait in top and
100+MiB/s disk read in iotop (normal HDD, not SSD), which almost freeze
the server.
kernel 4.4.0-33-generic
11:48:21 up 209 days, 16:33, 2 users, load average: 0.01, 0.77, 0.68
total used free shared buff/cache available
Mem: 990 790 65 30 134 34
Swap: 495 495 0
After killed the check-new-release process, the server recovered from
freezing.
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https://bugs.launchpad.net/bugs/1219786
Title:
Frantic disk activity by check-new-release makes system temporarily
almost unusable
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