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Jan
19
awarded  Popular Question
Dec
22
awarded  Notable Question
Nov
19
comment When to use or not to use sendfile on/off in nginx?
Our production server is on Amazon EC2
Nov
19
comment When to use or not to use sendfile on/off in nginx?
To make things easier, should we restart nginx every time we have deployed new files to our production server? If we don't want to restart nginx, how else we can clear nginx cache? (assuming if sendfile on; is related to cache)
Nov
19
asked When to use or not to use sendfile on/off in nginx?
Nov
16
revised How to select different backend based on URI when using “mode tcp”
added 51 characters in body
Nov
16
comment How to select different backend based on URI when using “mode tcp”
Is there a workaround? or is there another way I can use http2 in haproxy without mode tcp?
Nov
16
asked How to select different backend based on URI when using “mode tcp”
Nov
16
accepted How to check what is causing performance issue
Nov
16
answered How to check what is causing performance issue
Nov
11
comment How to check what is causing performance issue
is a production machine so is a bit difficult for me to start changing things around and start profiling. The reason I can pinpoint that few lines of codes that causes the slow down because it is turn on and off by a config. Currently the only main issue I can find out is the slow IO, but that few lines of codes doesn't do any intensive IO operation besides doing a HTTP post
Nov
11
revised How to check what is causing performance issue
added 254 characters in body
Nov
10
comment How to check what is causing performance issue
Is difficult for me at the moment as I first need to get hold the right person to get access or permission. This might explain why a simple file copy will slow down node.js, but is still doesn't explain why a specific block of code will slow down node.js as well. (as it gets data from another server, and http post to another server, and both servers are on same LAN)
Nov
10
comment How to check what is causing performance issue
Thanks, updated the post, info is under uname -a
Nov
10
revised How to check what is causing performance issue
added 430 characters in body
Nov
10
comment How to check what is causing performance issue
I tried to do hdparm but I get error "HDIO_DRIVE_CMD(identify) failed: Invalid exchange". Any idea how else I can check? (I couldn't physically check the machine)
Nov
10
revised How to check what is causing performance issue
edited tags
Nov
10
asked How to check what is causing performance issue
Oct
15
awarded  Notable Question
Sep
1
awarded  Caucus