Everything is slow?

[homerdoh]

Since yesterday i've noticed my FTP has slowed down considerably and webpages are very slow to load. Anyone else notice this problem? I'm on Carbon btw.

[jason]

The best thing to do in this case is open a support ticket to allert the techs. Then they can look for problems on the server. These kinds of things are usually caused by scripts that consume too many resources, spammers who've gotten an account on the server, or (d)DOS attacks.

Also, do a tracceroute to rule out it being a problem somewhere between you and the NOC--this happens a lot, too.

--Jason

[Jaded]

I too am having 56k flashbacks lol.

[Spathiphyllum]

Tuesday and Wednesday night of this week between 10:00PM and 12:00 I noticed dramatic and significant drops in speed and access. I figured it was one of those temporary spikes or was a continuation of the issue mentioned a few days ago. A maintenance update mentioning a DOS attack or network slowdown was noted by the admins so I held off on sending a ticket. BTW, I'm not on Carbon.

Sometimes I wonder if a network assault on any given server or any single webserver issue manifests itself throughout the entire network. I'm not talking about a DNS server assault which, of course, would impact the whole intranet, but a routing issue of a buggered server that results in extreme, bounced packets that clogs the connections. More than once I've noticed temporary slowdows when another server goes offline for maintenance. This shouldn't effect "my" server unless it is sharing a resource on the downed server. Just wondering how things are routed in a big webhost. Not a serious problem, just an observation. Jag still performs well overall.

[jason]

Well, the NOC has several connections to the Internet and all of the servers share them. Since there is a finite amount of bandwidth through them, if someone launces a large enough attack against one server, the pipes can become clogged, if you will, and the other servers can suffer.

--Jason

[rob1]

As I type this, I'm waiting for my page to load. It's doing that 'load fine, load fine, bog down, load fine' off and on thing in the middle of the night again. Optimus server.

Hm- and still waiting....

Someone needs to figure out what's up with this middle of the night 'bog down' thing. I know it's sporadic, but it's also irksome.

[Spathiphyllum]

Well, the NOC has several connections to the Internet...if someone launces a large enough attack against one server...the other servers can suffer.

That would be one heck-uv-an assault. I'm just wondering if it something internal to the Jaguar/Aletia intranet. Something along the lines of a mesh or, worse, ring topology whereby any downed system radically impacts its peers. I don't know why but I'm not convinced that the problems are external DOS because of the consistency of time and duration. It just seems like a rogue server, initiated by what I don't know, that throws a tantrum on a regular, periodic basis. Just wild speculation again with absolutely no information. But hey, gotta keep those network troubleshooting neurons firing every once in a while.

[Vin DSL]

...I don't know why but I'm not convinced that the problems are external DOS because of the consistency of time and duration...

LoL! Maybe it's because I'm the first person that noticed it. Most of the time it's PHP related. The rest of the time it's MySQL related, possibly linked to PHP also.

Look, is anyone having a problem that DOES NOT run PHP and MySQL?

[Spathiphyllum]

Look, is anyone having a problem that DOES NOT run PHP and MySQL?

That's going to be a bit difficult to diagnose since every shared server has both installed. That would limit the number of potential stripped-down servers dramatically, perhaps to nil. I'm not too quick to assume its PHP or mySQL even though poorly implemented code could very well sabotage a site or two. It's quite possible that neither are the culprit. Further, even if I am not running PHP or MySQL, someone else on the same sever could be... or maybe my server is completely devoid of both apps (not true but playing hypotheticals) but the server upstream from me does. Depending on topology, that server's maladjusted behavior could impact mine.

By the way, I do not run PHP, and MySQL is used only occassionally and is not the backend, dynamic app producing my XHTML. I'm using oldschool, hardcode for the bulk of my content and perl scripts with templates for most of the rest. I experience these intermittent slowdowns too.

[Vin DSL]

I'm using oldschool, hardcode for the bulk of my content and perl scripts with templates for most of the rest. I experience these intermittent slowdowns too.

Okay, well, so much for that theory. I would judge it to be a network problem then...

Still, DOS attacks, and so forth, don't account for my site requiring 22,000 MySQL queries to generate a page instead of 200. Hrm...





Please note the times - basically midnight, server time, then 20 minutes after...

[Spathiphyllum]

...don't account for my site requiring 22,000 MySQL queries to generate a page instead of 200.

Yeah, seems pretty excessive. Have you ever created a table of queries/reload on a 1-min interval for, say, half an hour (10:00 to 10:30PM) and plotted it? Might be worth it to try to pinpoint things a bit better. If you see an episodic sine wave, that might tell you something; likewise, an erratic peak/valley with highly variable peaks would indicate something entirely different. Not sure what it would all mean but at least you'd be applying a method to the madness. C'mon Vin, put that scientific method and computer science to use.

[Vin DSL]

C'mon Vin, put that scientific method and computer science to use.

LoL! That's what I pay JagPC 26-cents a day to do...

"Send me more men and fewer questions."
- "Stonewall" Jackson

It's a Texas thing...

[Spathiphyllum]

LoL! That's what I pay JagPC 26-cents a day to do...
"Send me more men and fewer questions." - "Stonewall" Jackson

Amended quote with a Jag context:
"Send me more money." - Jaguar"We-do-more-for-less"PC

[Ron]

"We do more for Les"
-Jaguar HR

...

"We do Les for more."
-Several Anonymous sources

[martin01]

to get back to the topic
I notice a poor performace too. my traceroutes show a problem on jaguarpc network.

Martin