[lug] lsof

[George S.]

On 4/13/2018 1:50 PM, Jeffrey S. Haemer wrote:
> Folks,
>
> I was going to ask last night at the BLUG meeting but ....
>
> First, a confession: this isn't just a Linux question, it's a 
> "difference between OSX and Linux" question. If you never use Macs, 
> you'll probably neither know nor care about the answer.
>
> I've been testing a FUSE filesystem.  One test I wrote behaved oddly 
> on OSX 10.13.4.
> Investigation revealed the command biting me: lsof.
>
> On Linux, lsof, which reports whether someone's got a file open, 
> returns instantly.  On 10.13.4, it returns in 10 seconds or so.  It 
> gets the right answer, but verrrrrryyyyy sllllllllllllowwwwly. Before 
> you suggest I try fuser, I'll tell you it has the same problem.

Just running lsof with no arguments takes around seconds 51 seconds on 
my 8 core machine. That's around 440 processes, around half of which are 
PostgreSQL. One (thread/fork) instance of PostgreSQL has around 180 
files open.

So, it seems to be somewhat sensitive to how many processes you have and 
the number of files a process has.


>
> Can anyone either tell me how to make this work again, or what I could 
> use instead? My normal help desk -- Google -- didn't come through for 
> me this time.
>
> --
> Jeffrey Haemer <jeffrey.haemer at gmail.com 
> <mailto:jeffrey.haemer at gmail.com>>
> 720-837-8908 [cell], @goyishekop [twitter]
> /פרייהייט? דאס איז יאַנג דינען וואָרט!/
>
>
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-- 
George S.
*MH Software, Inc.*
Voice: 303 438 9585
http://www.mhsoftware.com
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