Wiki extremely slow

[JeroenDeDauw]

I'm noticing that the SMW wiki is currently extremely slow. Takes over 10 seconds for something to load... not sure what is going on.

[kghbln]

I believe that this was a flooding attack, at least this is what happened to sandbox and the reason why I took it off-line during the night.

[kghbln]

Indeed this is a flooding attack by IP 62.210.78.104. The server load is currently at 60 while an acceptable max is at about 3 for the two cores we have.

[JeroenDeDauw]

Indeed this is a flooding attack by IP 62.210.78.104.

The server load is currently at 60 while an acceptable max is at about 3 for the two cores we have.

How do you figure 3 is the max, and how can I see the load when I ssh into the box?

[kghbln]

With acceptable max I mean a max which will go unnoticed by the users. It's a rough estimate which may vary, so 4 may still be cool too.

Just issue top when being on the sever which will also show you other data too.

[kghbln]

Things like this one should go to this place in the future.

[kghbln]

Always trouble with the tribbels, however it seems to be over.

[mwjames]

Always trouble with the tribbels, however it seems to be over.

Would it help to return a custom 404 page instead and let users know that servers are currently unavailable?

[kghbln]

Would it help to return a custom 404 page instead and let users know that servers are currently unavailable?

I guess this would make sense in connection with Apache's "mod_reqtimeout". But also adding "mod_qos" and "mod_security" make sense in this connection though these are add-ons which I have to investigate further in the sense of how to handle these best.