[DragonFlyBSD - Bug #2610] Hammer mirror copy causes extreme slowdown on new ssh connections

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #2610 has been updated by t_dfbsd.


Thanks for the suggestions.  I tried copying an 8GB file and didn't have any problems while that was going on.  Also, I don't recall ever having this issue on 3.4.  This seems to have started with 3.6+.

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Bug #2610: Hammer mirror copy causes extreme slowdown on new ssh connections
http://bugs.dragonflybsd.org/issues/2610#change-11658

* Author: t_dfbsd
* Status: New
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
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I ssh into the machine to do a mirror copy or mirror stream from a master PFS on a SATA drive to a newly created slave PFS on a different SATA drive (both drives are encrypted).  During the mirror copy everything seems fine and the SSH session I'm in seems responsive enough.   CPU usage as reported by top doesn't exceed 40%.

If I try to make a new SSH session right after the mirror copy starts it works normally.  However, a few minutes after the mirror copy starts, any attempt to SSH takes a vey long time to connect.  It appears that other types of network connections, like SMB are similarly affected.  There is no activity on the box other than the mirror copy or stream.  If I kill that, then things return to normal.


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