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bin/51572: systat has memory leak(s)

>Number:         51572
>Category:       bin
>Synopsis:       systat has memory leak(s)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Oct 22 15:45:00 +0000 2016
>Originator:     scole_mail
>Release:        7.0.2 (and current I believe)
NetBSD dstar 7.0.2_PATCH NetBSD 7.0.2_PATCH (GENERIC) #0: Fri Oct 21 11:17:36 PDT 2016  scole@dstar:/home/scole/nbsd/cvs/7_0/obj/sys/arch/i386/compile/GENERIC i386
I think systat has a memory leak issue.   It seems to keep growing in memory usage, at different rates, depending on what display is chosen.

On my i386 machine, it started out using about 3.8M, and overnight grew anywhere 9M to 75M, depending on the screen.

bufcache (19M), vmstat (9M), and ifstat (75M) were some of the displays I ran that seemed to have issues.

Anyone recommend some tools that would work to detect these types of leaks on NetBSD?

systat -w 1 vmstat
systat -w 1 bufcache
 or for current only
systat -w 1 ifstat

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