We findthat for some servers io disk read is very high. We also notice that there are many major page faults on those servers. But we checked the /proc/zoneinfo, there are enough free pages. Here is the content of /proc/zoneinfo:pages free 3913507min11333low14166h..
Author : yf chu
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Recently, I found that many processes in our server experienced high frequency of major page faults. The disk IO on this server is also very high. I also noticed that when I execute top command, for some processes, the value in SHR column became ze..
We have experienced a very weird problem. The load of the server machine is very high. We use pidstat and find that the disk read io is very high.But the processes running on this server do not perform any disk read operation. We also noticed that w..
I have found a very strange problem. We found that the time of establishing the websocket connection between mobile phone and server was too long. Then I use tcpdump to capture the data and found that the problem maybe has something to do with win..
I am a website developer.We deploy a Nginx server on CentOS to provide HTTP services. Recently, some customers of our website were complaining about that occasionally they could not open the webpage, the web browser show that the tcp connection was rese..
I want to install several gcc with different versions in CentOS. The default version of gcc in CentOS6 is 4.9.3. So I use devtoolset install a higher version of gcc. Then I switch to the higher version of gcc by executing source /opt/rh/devtoolset-5/enab..
I have a website with millions of pages. We often deploy our websites on CentOS with Nginx and Apache Http Server as HTTP Web Server. I am very worried about the performance of web server if the amount of pages is very very large. I wonder whether ..
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