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31/20 answers
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3h
comment Run single-threaded application on multiple processors
This is way too generic a description of the problem. To give you any kind of useful help, we'd need much more specific information.
Apr
29
comment My VPSs CPU load hardly go beyond 0.2. Am I wasting my money on unused resources?
Are you sure you're paying for 1.0? On many virtual hosting schemes, you are only permitted to burst to 1.0 and will find yourself brutally throttled if you stay there for long or often. (Because they've sold more vCPUs than physical CPUs.) For example, Amazon T2 instances are like this. If this is a t2.small, you're maxed.
Apr
23
comment KVM port-forwarding from ppp0 to VM's bridged NIC not working, but to VM's NAT NIC works?
Is the host connected wirelessly?
Apr
23
comment setup domain with random ip addresses
I've read that several times and I still can't figure out what "sends this request with different ip addresses" means. Do you mean to different IP address? Or from them? And, whichever, why do you think you need that and what do you think it will accomplish?
Apr
20
comment SQL Server total memory less than target memory, lot of extra memory unallocated
How big is your database?
Apr
20
comment setup domain with random ip addresses
You should explain why you think you need that and what you think it will accomplish.
Apr
17
comment When should I consider to add more RAM to VPS instead of CPU?
The OS itself uses RAM for disk caching.
Apr
17
answered Intel USB 3.0 eXtensible Host Controller - Exceeded Number of Supported Devices?
Apr
12
comment Difference between tcp recv buffer and tcp receive window size?
@David The aim of data in flight is not to avoid overfilling the buffer, it's to handle the delay introduced by the communications channel. Adapting to the bandwidth and latency of the communications channel is one issue, adapting to the application's read behavior is another.
Apr
10
comment multiple ips on same server
Why can't you plug any cable in eth2? Couldn't you plug in a machine and assign it 163.88.0.28?
Apr
6
comment Fast Ethernet UDP optimize receive buffers
The buffers are very unlikely to be a significant part of the issue. It's much more likely to be other parts of the network and the software.
Apr
6
comment CPU usage of server extremely low and webpage load time high?
What is that device? It seems like it has unbelievably poor performance.
Apr
1
comment What's a good RLIMIT_CORE setting if I only want backtrace?
I would suggest just modifying your program to generate a backtrace rather than a core dump in the first place, at least as a compile-time option.
Mar
30
comment Squid3 don't caching, always TCP_MISS/200
What makes you think the miss isn't legitimate?
Mar
30
comment php process eating CPU since October
How about investigating. For example, find the process that's eating the CPU and see what it's doing, what files it has open, and so on.
Mar
29
revised Linux SMP Kernel Ram Utilization
edited body
Mar
29
comment Server high memory and cpu - no leads
That really doesn't mean much. If there's no evidence of excessive I/O caused by memory pressure, I'd investigate the CPU usage.
Mar
27
comment Server high memory and cpu - no leads
The amount of memory paged out seems microscopic, less than 1GB on a machine with 32GB of RAM. That could be perfectly normal. I'd focus on the CPU usage unless/until you have better evidence that memory pressure is a problem.
Mar
26
comment Does TCP's MSS hide a mismatched intra-LAN MTU?
I guess it depends on the implementation. MTU black hole detection is usually implemented as well.
Mar
26
comment Does TCP's MSS hide a mismatched intra-LAN MTU?
That won't cause path MTU discovery to fail, but it will cause fragmentation to fail, possibly breaking applications that don't use path MTU discovery.