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Re: Sudden but sustained high bandwidth usage

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I know what is happening. I just don't know how to fix it without breaking windows updates caching.
The "extra" traffic is coming from windows updates mirrors.

acl wupdatecachable url_regex -i (microsoft|windowsupdate)\.com.*\.(cab|exe|ms[i|u|f]|dat|zip|psf|appx|appxbundle|esd)
range_offset_limit none wupdatecachable

Commenting this second line is enough to put an end to the insane downloads. But then all the RANGE requests of windows updates won't be cached.

I don't know how to explain these FD numbers. I'm using EXT4 and I don't know what are vmware cache disks.

Oh, and it seems not only windows updates' range requests are giving trouble:

1457381845.725    241 10.101.1.23 TCP_SWAPFAIL_MISS/206 33123 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.036    293 10.101.1.23 TCP_SWAPFAIL_MISS/206 151352 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.120     66 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.310     66 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.397     60 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.514     63 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.633     65 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.747     63 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.839     63 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381846.949     81 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381847.041     61 10.101.1.23 TCP_SWAPFAIL_MISS/206 33129 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381847.192    118 10.101.1.23 TCP_SWAPFAIL_MISS/206 65897 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381847.447    207 10.101.1.23 TCP_SWAPFAIL_MISS/206 121720 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2015-10/1043520/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381862.824    639 10.101.1.23 TCP_SWAPFAIL_MISS/206 33122 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381865.720   2879 10.101.1.23 TCP_SWAPFAIL_MISS/206 221234 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381866.078    343 10.101.1.23 TCP_SWAPFAIL_MISS/206 33130 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381867.107    995 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381867.523    400 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381867.830    291 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381868.082    238 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381868.318    219 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381868.503    171 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381868.695    174 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381868.880    170 10.101.1.23 TCP_SWAPFAIL_MISS/206 33128 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381869.179    286 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381869.424    231 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381869.761    322 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381870.008    232 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381870.236    214 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381870.429    178 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381870.609    174 10.101.1.23 TCP_SWAPFAIL_MISS/206 65896 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381870.805    180 10.101.1.23 TCP_SWAPFAIL_MISS/206 65897 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf
1457381871.008    189 10.101.1.23 TCP_SWAPFAIL_MISS/206 65898 GET http://www.stf.jus.br/arquivo/biblioteca/NovasAquisicoes/2016-02/1022313/sumario.pdf - HIER_DIRECT/201.49.144.135 application/pdf

Best Regards,

-- 
Heiler Bemerguy - (91) 98151-4894
Assessor Técnico - CINBESA (91) 3184-1751

Em 07/03/2016 18:00, Eliezer Croitoru escreveu:
On 07/03/2016 22:08, Yuri Voinov wrote:
90 Gb first, 300 Gb second.
Thanks but...
Wouldn't it be much simpler and cheaper to just use WSUS instead all of the hassle??(if it's a closed business environment)
And when does the TCP_SWAPFAIL_MISS happens? always?
And a little tweak for the squid.conf
read_ahead_gap 4096 KB

The above doesn't match your environment bandwidth.
You are just spending too much bandwidth on requests that might not be fulfilled.
Try changing the settings to:
read_ahead_gap 128 KB

and see if it helps with something.
Also since your issue is bandwidth and users are not allowed to the Internet without the proxy I would try to dump the pfsense pf states to see what happens in the network layer, what src IP is consuming all this bandwidth.(or get a wider picture)
Also squid would not be the answer for a fully reasonable network usage, it only comes to help with couple specific things and not to mirror the whole Internet or even just MS as it is.(not saying that your case is a trial such as this)
MS has more then one API that can be mistaken as a download and it can consume more then actually required caching.

I do not know exactly what this means from the info page:
        Maximum number of file descriptors:   81920
        Largest file desc currently in use:   6157
        Number of file desc currently in use: 8216

If the number of FD currently in use is 8216 then the largest file desc currently in use doesn't match.
This specific question might be a bug or expected result but I do not know and Amos or Alex or others might know the answer for this specific info page issue.

Another question I have which might be related(I have experienced such issues with GlusterFS in the past), how is the VM cache disk\s are connected? Is it connected directly to the VM or in the hypervisor level?
How do you mount them(fstab)? are these on the root disk or do you have couple disks mounted?
Did you had the chance to try to use other FS then EXT4? reiserFS? XFS? other?

The above questions are related to the TCP_SWAPFAIL_MISS.
Since there is an issue and you are probably only on the "buffering" testing stage of the cache_dir I would try to somehow reproduce the issue but it's not clear to me what is the exact way to replicate the issue.

Thanks,
Eliezer 

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