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Nov
3
comment Recommended TCP keepalive settings for a busy server
Specifically I'm seeing this from an app server communicating with a redis server. Neither server is stressed or responding slowly though.
Nov
3
comment Recommended TCP keepalive settings for a busy server
At the application level these errors are 'read ETIMEDOUT', but I'm not sure how I'd give you any lower-level info than that.
Nov
3
comment Recommended TCP keepalive settings for a busy server
Only timeout I can see is /proc/sys/net/ipv4/tcp_fin_timeout which is 60. Is that what you meant? (Just realised you might be talking about the timeout errors we have been getting - will try to get these for you)
Sep
30
comment How to reliable re-install nf_conntrack module after removal?
Hmm, lsmod returns nothing (and I haven't removed anything yet). Perhaps I'm misunderstanding something?
Sep
29
comment How to reliable re-install nf_conntrack module after removal?
@HBruijn - I realise that it's necessary for certain types of rules in iptables (like those using the state keyword), but as I understand it, if these rules are not being used, then it is unnecessary. Is there something non-iptables that uses it in a standard config?
Sep
29
comment HAProxy high CPU usage - configuration issue?
Splitting into two processes is an interesting idea that I had not considered, thank you. Static traffic is very low, as we are behind a CDN, however spitting http app calls and the websocket traffic might be worth taking a look at. I suppose it would complicate our DNS records a little bit, but not a big deal. I'd like to see if I'm doing anything terribly wrong with the config first, but will certainly consider this.
Sep
29
comment How to reliable re-install nf_conntrack module after removal?
Just to follow up. Do you know of a good way to check if the modules have been loaded back? I'm a little concerned that something might load them again without my knowledge
Sep
29
comment How to reliable re-install nf_conntrack module after removal?
Thanks. I think I've already removed/modified and iptables rules that use these modules. (Updated question now with this and your point about modprobe lists).
Sep
28
comment HAProxy high CPU usage - configuration issue?
@ChristopherPerrin - That's a long story which I don't want to get into here.
Sep
26
comment how do I disable the nf_conntrack kernel module in CentOS 5.3 without recompiling the kernel
Does anyone know how you'd reverse step 4 if you needed to?
Aug
31
comment Understanding ntpd entry in syslog
Thank you! I wonder why the error message couldn't just say something like this?
Aug
29
comment Simple method of detecting and reporting server outage?
@kasperd - In this case I'm monitoring for a very specific failure scenario, and ping will be sufficient.
Aug
28
comment Why might debian become unresponsive with virtually 0% CPU usage?
@AndrewSchulman I don't see anything in kern.log or syslog that looks like an error.
Jun
9
comment Too many file descriptors on Debian, ulimit -n has no effect
Are you able to elaborate on this a bit please?
Mar
8
comment Understanding difference between system and process memory in htop
Oh, and htop version is 0.8.3
Mar
8
comment Understanding difference between system and process memory in htop
I've updated the question with the output from free - will try to post a screenshot later. free is reporting about 5.4GB in use / 2.7GB available. I'm under the impression that htop generally shows higher memory usage than other tools, so I guess htop must mean 456MB free as you say, still, it seems very low.
Mar
8
comment Understanding difference between system and process memory in htop
In that case, it would be the opposite convention to the swap usage shown directly under it (currently showing 0/2074 with no swap file usage) - are you sure?
Jan
25
comment How to reproduce read ETIMEDOUT with node_redis on my local dev machine?
Thanks. The problem Is I'm on windows for dev, so don't have iptables - but perhaps I'm going to have to connect to a remote redis.
Dec
9
comment ulimit -n not persisting, tried everything
You shouldn't really be running node as root in production
Dec
9
comment ulimit -n not persisting, tried everything
@gladoscc - Did you figure this out in the end?