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Potential fix for apparant (sporadic, selective) slow PM response

by ybiC (Prior)
on Dec 20, 2001 at 03:27 UTC ( #133328=monkdiscuss: print w/replies, xml ) Need Help??

I've been plagued with frequent, intermittant, slow response only from the PM site for a couple weeks.   As seen in recent threads, some (but by no means all) fellow monks have had similar problems.

When tye mentioned in the CB that he's not had this problem, but that he has some nodelets disabled, I ran (not walked) to user settings.   Deselecting "CPAN nodelet" and "Everything Developer" nodelet seems to have fixed the problem for me.   epoptai tells me that "Other Users" and "Chatterbox" also slow things down, but I don't use them anyway, preferring framechat instead.

What remains selected in my nodelets are:

  • input
  • info
  • leftovers
  • function
  • voting
  • personal

In any event, I would still encourage fellow monks who can spare the cash (myself included) to contribute to Perl Monks via the offering plate.
    striving toward Perl Adept
    (it's pronounced "why-bick")

  • Comment on Potential fix for apparant (sporadic, selective) slow PM response

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Re: Potential fix for apparant (sporadic, selective) slow PM response
by blakem (Monsignor) on Dec 20, 2001 at 03:47 UTC
    If you'd prefer to donate using a credit card, and want a tax-deductible receipt mailed to you, see the new perl-foundation donations page. There are two seperate funds -- the Perl Development Grant and the YAS General Fund. Donations to the YAS General Fund can be earmarked for perlmonks related purposes in the comments section.

    It simple and easy, no pay-pal, no stamps and envelopes, just pointing, clicking, and donating. Tis the season....


Re: Potential fix for apparant (I don't get it!)
by petral (Curate) on Dec 20, 2001 at 05:19 UTC
         Deselecting "CPAN nodelet"
    I've always had the cpan nodelet selected, but I haven't seen it for the last couple of months.  I thought it had been generally turned off because of these slow response problems

      I'm not on the PMdev team, so these are only my own observations, and in no way authoritative:

      Nodelets seem to only manifest themselves when there's relevent content.   For example, the "Functions" nodelet does not appear if there's no perl code in the node, or if you're at the root of a section.   So the CPAN nodelet, for example, hasn't been present even though selected by you, I, and other monks presumably because of the recent background problems within CPAN peering(?).

      Something I forgot to include in the root of this thread is that I finally got around to eliminating my pet theory* of problem within one or more specific internet distribution points, by pinging** the PM host at the same time as I was experiencing page load delays.  The ping responses were consistantly good (good for dialup, at least) at the same time as PM response varied from horrible to fine.   So when tye mentioned nodelets, the light bulb clicked on!   8^)
          striving toward Perl Adept
          (it's pronounced "why-bick")

      * Fastolfe independantly arrived at the same theory here

      ** I prefer to know ping response times _before_ doing a traceroute.   If the end-to-end ping response is fine, then I don't care about intermediate responses, since my real-world application _isn't_ getting responses from intermediate routers.

      Also, for more meaningful ping info, specify a near-mtu ICMP packet size.   With Linux, I did "ping -s 1000", on win32 the switch would be "-l" (ell, not one).   The default ICMP echo-request packet is 56 bytes, whereas almost every TCP packet carrying HTTP payload will be MTU.   On my dialup connection it made the difference between ~200ms and ~400ms average response.

Re: Potential fix for apparant (sporadic, selective) slow PM response
by Chrisf (Friar) on Dec 26, 2001 at 20:06 UTC
    The CPAN nodelet was definately slowing things down for me.

    For about a week things were running very slowly and timing out about every 5th page view (chances are you heard me complaining about it in the Chatterbox ;). I turned off the CPAN nodelet and haven't had any problems at all since.

(schumi) Re: Potential fix for apparant (sporadic, selective) slow PM response
by schumi (Hermit) on Dec 28, 2001 at 02:15 UTC
    Having suffered from the same slow responses mentioned above, I was only too grateful for the possible solution you suggested, and immediately tried it. After turning off the CPAN nodelet, the PM response time has improved considerably.

    Thank you for suggesting this.


      Ditto for me. I just turned off CPAN nodelet and response time is consistently good. Thanks for the suggestion.

      Another satisfied monk.

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