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Apr
11
comment How should I monitor memory usage/performance in SunOS/Solaris?
Files in the tmp directory are parts of memory, unless they are paged out to disk by file operations or memory pressure. That's how tmpfs works.
Apr
11
answered How do http proxies determine https traffic with a single port?
Apr
11
comment domain is pointing to default static page on server but settings look correct
Are you sure mysite.cn and ww3.mysite.cn all resolve to IP addresses assigned to this server?
Apr
10
comment Gateway Modem loses ability to DNS lookup intermittently, often under heavy load
When hosts are in the condition where DNS is failing, can they still reach Internet sites by IP address? Do their traceroutes by IP pass the router? Can they still ping the router? You need to do some troubleshooting to narrow the range of possible problems. Your problem may be with DNS, or it may be DNS failing because that's what happens first.
Apr
10
comment select() hangs due to resource exhaustion - but what resource?
What do you mean by "resource exhaustion"?
Apr
9
comment High Memory Utilization on a few servers in an ESXi Environment
What happens if you don't reboot the servers? Do they get slow? Do they get errors?
Apr
9
answered select() hangs due to resource exhaustion - but what resource?
Apr
9
answered Lost connection to OpenWRT router
Apr
9
comment dhclient requests filling memory?
I wouldn't read very much into either of those bits of information. RAM being used is normal and doesn't indicate a shortage. (We give a server RAM because we want it to use it to run faster, not because we want to see lots of free RAM to make us feel better.) And your description of a single incident whose diagnosis was reported to you by an uninterested third party wouldn't carry much weight, IMO. I would strongly urge you to avoid limiting your troubleshooting by jumping to a diagnosis. (Especially since you seem to have jumped at least twice now, focusing on DHCLIENT.)
Apr
9
comment 2 EC2 instances have time gap of 25 secs. Is this normal?
You can use a command like ntpdate -q time.windows.com to check the time accuracy. The error will be the number after the word offset, in seconds.
Apr
9
comment How can I determine what is sending so much data from my Windows Server running SQL Server?
I'd worry about an attack such as an SQL injection attack.
Apr
9
comment dhclient requests filling memory?
What do you mean by "running out of memory"? Are you getting error messages? If it's running out of free memory, that's normal. Since free memory is useless, the system tries as hard as it can to minimize the amount of free memory.
Apr
9
comment How can I use sudo when I logged in with a SSH key in PuTTY?
What you do depends on what you want to happen, which you didn't tell us.
Apr
8
comment Why is uploading to S3 so slow?
Start troubleshooting. What does your CPU usage look like while you're uploading? What does a traceroute look like? Is the send queue on your side of the TCP connection nearly full or nearly empty? With a few very simple tests you can quickly narrow down the problem.
Apr
8
comment how to rewrite '%25' in url
And don't ever use a literal % character in any of your URLs.
Apr
8
answered What is name server of my domain, pointing to hosted site on Github Pages?
Apr
8
comment Swap 95%+ , but a lot of free ram memory
You forgot to tell us what the problem is! Do you have a performance problem? Is there any indication that this isn't the optimum memory usage pattern for your workload, RAM size, and swap size?
Apr
7
comment Websites get hijacked by parking page
That doesn't help, since ns1.knothhosting05.nl and ns2.knothhosting05.nl just direct me to ns1.vlasveldmedia.nl and ns2.vlasveldmedia.nl. The knotthosting05.nl nameservers are wrong to direct me there, and the vlasveldmedia.nl nameservers are wrong for authoritatively answering for a domain they are no longer associated with. If you fix the knothhosting05.nl nameservers, 95% of the problem will go away.
Apr
7
comment Connection to mysql server in SYN_SENT
Sounds like the stateful firewall is out of connection slots. What's the output of /sbin/sysctl -a net.netfilter| egrep "track_max|track_count"?
Apr
7
revised Websites get hijacked by parking page
added 596 characters in body