New answers tagged latency
Brandan Gregg has made a number of visual diagrams of which tool to use on what part of your system that make really nice cheat sheets: Tools: Which options to use in sar to monitor: And closely related: Translate observations into tuning with:
I want to add some tool to helps for get accurate result 1.Lsof 2.Psacct or Acct – Monitor User Activity 3.Monit – Linux Process and Services Monitoring 4.NetHogs 5.Monitorix – System and Network Monitoring 6.Arpwatch – Ethernet Activity Monitor 7.Suricata – Network Security Monitoring 8.VnStat PHP – Monitoring Network Bandwidth 9.Nagios – ...
I noticed you're using the db.micro instance. As with EC2, the micro instances are designed to be budget-friendly, but at a cost of performance. That said, you'll get a much worse performance when loading these types of servers versus the normal instances because the CPU time is given to the instance "last" compared to other instances sharing the same ...
Clearly you have an interference problem. Interference can come from passive elements like aluminum wall studs or thick floors, but those are not likely to show the periodic pattern you see. So something electric or electronic is periodically emitting. Finding it may be expensive or tough, but you have a few options. Graph more. It would be nice to make ...
To me, the intermittent nature indicates a hardware problem. Wireless routers go bad often. I'd try a new router and see if that doesn't resolve it. Maybe you can replace under warranty with Netgear if it's not too old? Or you could always run a bunch of cat-5 and mini switches everywhere, the wired part of the router's probably fine
Here is Microsoft's Performance Tuning Guidelines document for Windows Server 2008 R2: http://download.microsoft.com/download/6/B/2/6B2EBD3A-302E-4553-AC00-9885BBF31E21/Perf-tun-srv-R2.docx There are 136 pages of performance tuning guidelines in that document. You might also get some interesting info from support.microsoft.com/kb/214397/en-us You might ...
Start by disabling large send offload, the network stack wait to send the packet to fill the buffer, with the option at off it send more small packets, but help for speed intensive app.
If your content is static, then it's cachable and get boost by CDN.
The redis.io notes talk about the fork time, not the time taken to fully persist the file on disk.
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