Database slowness

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Eric KorpelaProject Donor
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Message 1900400 - Posted: 11 Nov 2017, 0:09:26 UTC

We're having some as yet unexplained slowness with the our BOINC database. There don't seem to be any hardware issues. Temperatures are running normal and all the drives seem good. Yet for some reason the query that fills the "ready to send" queue is running about 10 times slower than it normally does.

Until I get it fixed, it means that on average we're sending out 3 workunits a second rather than 30+.

I'll let you know when I've got it figured out.
@SETIEric

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Message 1900413 - Posted: 11 Nov 2017, 0:54:57 UTC

Thanks for the update.
Greatly appreciated.
Grant
Darwin NT
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Message 1900414 - Posted: 11 Nov 2017, 0:58:29 UTC

Thank you, Eric.
I know you put a lot of effort into it when things are not running as they should be.
Very much appreciated!
A kitty keeps loneliness away.
More meowing, less hissing. I speak meow, do you?

Have made friends in this life.
Most were cats.
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Message 1900482 - Posted: 11 Nov 2017, 5:56:29 UTC

Thank you for the update!
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Profile Chris SCrowdfunding Project Donor
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Message 1900488 - Posted: 11 Nov 2017, 6:25:20 UTC

Well done for keeping us up to date with events, and thank you to find time from your busy schedule. Gosh almost back to the heady days of Matts weekly report :-))
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Message 1900490 - Posted: 11 Nov 2017, 6:46:02 UTC

Eric - Thanks for the update. I don't know if this makes any difference in your troubleshooting, but I haven't gotten an CPU tasks for several hours, in fact I'm down to 17 from 100.


I don't buy computers, I build them!!
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Message 1900492 - Posted: 11 Nov 2017, 7:11:51 UTC - in response to Message 1900490.  

Cliff that is likely because the server normally fills the fastest component first. That would be your 750Ti's.
I have a similar thing happening here, since there are not many Arecibo vlars about, the CPU doesn't get much.
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Message 1900495 - Posted: 11 Nov 2017, 7:58:10 UTC

Thanks I was kinda confused
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Message 1900500 - Posted: 11 Nov 2017, 8:34:32 UTC - in response to Message 1900400.  

Have you checked with your ISP?
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Message 1900515 - Posted: 11 Nov 2017, 13:30:48 UTC - in response to Message 1900400.  

since about 2 days it started it has become very slow
my pc has just turned itself off and shut down
and independently removed 2 annoying suspicious entries
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Message 1900533 - Posted: 11 Nov 2017, 16:08:10 UTC - in response to Message 1900500.  
Last modified: 11 Nov 2017, 16:12:24 UTC

Have you checked with your ISP?


Eric is talking about the response of the BOINC database, which is all in one location, on one computer...
even if SETI was having a slow ISP responce, (they aren't!) the symptoms displayed would be different.

I've set all my fast machines to what I call "pester" mode... (every time the machine updates, [which it does every time it finishes and uploads a WU...] it requests new tasks...)
.
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Eric KorpelaProject Donor
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Message 1900553 - Posted: 11 Nov 2017, 18:03:06 UTC

I bumped the memory allocated to the database by 20% and transferred some common queries to the replica. Things things seem to have stabilized.
@SETIEric

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Message 1900554 - Posted: 11 Nov 2017, 18:06:40 UTC - in response to Message 1900515.  

since about 2 days it started it has become very slow
my pc has just turned itself off and shut down
and independently removed 2 annoying suspicious entries


I was having similar symptoms, a few days ago. I fixed it by taking a damp Q-tip to the vanes of my CPU heat sink. CPU temperature dropped by 30C. One of these days someone will invent a self cleaning heat sink. (Reversible fan maybe?)
@SETIEric

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Profile Gary CharpentierCrowdfunding Project Donor
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Message 1900577 - Posted: 11 Nov 2017, 20:33:41 UTC - in response to Message 1900554.  

since about 2 days it started it has become very slow
my pc has just turned itself off and shut down
and independently removed 2 annoying suspicious entries


I was having similar symptoms, a few days ago. I fixed it by taking a damp Q-tip to the vanes of my CPU heat sink. CPU temperature dropped by 30C. One of these days someone will invent a self cleaning heat sink. (Reversible fan maybe?)

If only ... some bright engineer type decided to make the vanes come out like spokes on a wheel. Easy to clean the ends, impossible to get into the center. Also guess where the dust collects. In the tight spaces. Thankfully some other engineer invented canned air. I wonder how rocket scientists deal with this issue in zero g?
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Message 1900578 - Posted: 11 Nov 2017, 20:35:49 UTC - in response to Message 1900554.  

CPU temperature dropped by 30C.
Gosh that is an amazing drop. No de-fluffing just a damp Q-tip?
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Message 1900642 - Posted: 12 Nov 2017, 3:01:32 UTC - in response to Message 1900554.  

Nice tip! :-)

Thanks for all the hard work.
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Message 1900656 - Posted: 12 Nov 2017, 6:15:52 UTC - in response to Message 1900642.  

Hi there Eric, keep up the great work maintaining the system, especially on these long weekends.

I just wonder if the file deletion slowness might point you in a direction of problem area to look at. I have noticed over the past 5-7 weeks the deletion process gets backlogged as well as can be seen in the haveland graphs affecting both AP and MB task clean up.

Who knows, it could be something like an ailing network adaptor on a computer ...
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Message 1900731 - Posted: 12 Nov 2017, 16:51:53 UTC - in response to Message 1900554.  
Last modified: 12 Nov 2017, 16:54:58 UTC

since about 2 days it started it has become very slow
my pc has just turned itself off and shut down
and independently removed 2 annoying suspicious entries


I was having similar symptoms, a few days ago. I fixed it by taking a damp Q-tip to the vanes of my CPU heat sink. CPU temperature dropped by 30C. One of these days someone will invent a self cleaning heat sink. (Reversible fan maybe?)


Big can of pressurized air pointed in the reverse direction to the fan(s) on your radiator/heat sink (depending on whether you have liquid or air cooling...) always works for me... (every 6 months or so, my computers are in a dusty environment!)

Of course, then my dust allergy kicks in... :-(
.
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Message 1900798 - Posted: 13 Nov 2017, 0:24:26 UTC - in response to Message 1900731.  

Vacuum hose to suck up the dust.
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Message 1900918 - Posted: 13 Nov 2017, 17:32:22 UTC
Last modified: 13 Nov 2017, 18:03:43 UTC

Sometimes such a thing are called gremlins.

Sorry, but I think I catch the point here.

A bit of slowness being noticeable in the web-page, but now it is gone.
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Message boards : News : Database slowness


 
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