Re: Strange intermittent WebDNA problems
This WebDNA talk-list message is from 2008
It keeps the original formatting.
numero = 70091
interpreted = N
texte = We have had issues of cpu running up cpu usage and stopping or slowing greatly webDNA. this is usually a poorly written webbot hitting a series of links in calendars or data requests and leaving off or altering part of the string so that each request is calling on a lot more results than was designed in the code. The long term fix is for me to fix all my code to return nothing if a parameter is missing. also some exclusive locks might help. in the mean time we manage this with a script that watches cpu usage and restarts apache and webcatalog every few minutes until the cpu is back down to where it belongs. it takes more restarts depending on how severe in number of requests and how many processes are launched in requests in apache. we are Linux redhat 9 and webcat 6.0a 1gig ram. jym Steve Craig wrote: > Hi > >> Christer, since this is a reply to my post... it is odd that two of >> your servers started experiencing the problem the same time. Are >> those servers using a sync to a time server? > > Between myself and a friend who is not on the list, we have 2 WebDNA > machines and they virtually always go off within an hour of each > other. I have never coded anything on his and he has never coded > anything on mine. There are no common sites whatsoever, in fact we > usually have taken very different ways to solve coding things in the > past. So basically no connection other than existing in the same > physical rack. We use the same supplier for access but are on > different subnets. > >> Beyond that, I just don't think any of you guys/gals are posting enough >> details to make any sort of rational judgment of what is going on. > > That's the problem, there is nothing to tell, we have perfectly normal > setups with machines that have worked for years without problem then > this all started. Only thing that has been applied is the Apple > updates so it kinda has to be related to that I think but where to > start looking - it is so random. I host about 60 sites all of which I > have coded and all of which have been around for ages. > >> I think I'll defer to Steve Craig's assessment and just blame it >> on SMSI attacking our servers! ;-) > > Well I need to blame it on something and seems very strange that there > are others experiencing it. Seriously though I think it must be an OSX > update issue but it would be interesting to know when other machines > go off just in case they all go in a similar time period. > > On a slightly different subject, I am testing a server using Leopard > and WebDNA, so far so good but I'm wondering if anyone knows of some > software I can start on a few client machines to soak test the server > for while? I'd like to hit it with lots of hits over a week or so just > to see if anything creeps up. Anyone any suggestions? > > Cheers > ======================================== > Steve Craig - Asylum Interactive Ltd > Tel +44 1330 860550 Fax +44 1330 860880 > ======================================== > http://www.asylumweb.com > Email: steve@asylumweb.com > Skype: s.craig - iChat: steve.craig > ======================================== > > > > > > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list
. > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to > > Web Archive of this list is at: http://webdna.smithmicro.com/ > > -- Jym Duane - CTO - Purpose Media Creating Your Success Story Marketing : Television - Internet - Print Phone: (877) 443-1323 Email: jym@purposemedia.com Web: www.purposemedia.com Oregon Office - www.GuideToOregon.com PO Box 1725, Jacksonville, OR 97530 California Office - www.OrangeCounty.net PO Box 2025, Capistrano Beach, CA 92624 ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
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We have had issues of cpu running up cpu usage and stopping or slowing greatly webDNA. this is usually a poorly written webbot hitting a series of links in calendars or data requests and leaving off or altering part of the string so that each request is calling on a lot more results than was designed in the code. The long term fix is for me to fix all my code to return nothing if a parameter is missing. also some exclusive locks might help. in the mean time we manage this with a script that watches cpu usage and restarts apache and webcatalog every few minutes until the cpu is back down to where it belongs. it takes more restarts depending on how severe in number of requests and how many processes are launched in requests in apache. we are Linux redhat 9 and webcat 6.0a 1gig ram. jym Steve Craig wrote: > Hi > >> Christer, since this is a reply to my post... it is odd that two of >> your servers started experiencing the problem the same time. Are >> those servers using a sync to a time server? > > Between myself and a friend who is not on the list, we have 2 WebDNA > machines and they virtually always go off within an hour of each > other. I have never coded anything on his and he has never coded > anything on mine. There are no common sites whatsoever, in fact we > usually have taken very different ways to solve coding things in the > past. So basically no connection other than existing in the same > physical rack. We use the same supplier for access but are on > different subnets. > >> Beyond that, I just don't think any of you guys/gals are posting enough >> details to make any sort of rational judgment of what is going on. > > That's the problem, there is nothing to tell, we have perfectly normal > setups with machines that have worked for years without problem then > this all started. Only thing that has been applied is the Apple > updates so it kinda has to be related to that I think but where to > start looking - it is so random. I host about 60 sites all of which I > have coded and all of which have been around for ages. > >> I think I'll defer to Steve Craig's assessment and just blame it >> on SMSI attacking our servers! ;-) > > Well I need to blame it on something and seems very strange that there > are others experiencing it. Seriously though I think it must be an OSX > update issue but it would be interesting to know when other machines > go off just in case they all go in a similar time period. > > On a slightly different subject, I am testing a server using Leopard > and WebDNA, so far so good but I'm wondering if anyone knows of some > software I can start on a few client machines to soak test the server > for while? I'd like to hit it with lots of hits over a week or so just > to see if anything creeps up. Anyone any suggestions? > > Cheers > ======================================== > Steve Craig - Asylum Interactive Ltd > Tel +44 1330 860550 Fax +44 1330 860880 > ======================================== > http://www.asylumweb.com > Email: steve@asylumweb.com > Skype: s.craig - iChat: steve.craig > ======================================== > > > > > > > ------------------------------------------------------------- > This message is sent to you because you are subscribed to > the mailing list . > To unsubscribe, E-mail to: > To switch to the DIGEST mode, E-mail to > > Web Archive of this list is at: http://webdna.smithmicro.com/ > > -- Jym Duane - CTO - Purpose Media Creating Your Success Story Marketing : Television - Internet - Print Phone: (877) 443-1323 Email: jym@purposemedia.com Web: www.purposemedia.com Oregon Office - www.GuideToOregon.com PO Box 1725, Jacksonville, OR 97530 California Office - www.OrangeCounty.net PO Box 2025, Capistrano Beach, CA 92624 ------------------------------------------------------------- This message is sent to you because you are subscribed to the mailing list . To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Web Archive of this list is at: http://webdna.smithmicro.com/
Jym Duane
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