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bio website twitter.com/shanemadden
location Denver, CO
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visits member for 3 years, 11 months
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Site Reliability Engineer at Stack Exchange.

@shanemadden


Dec
22
answered How to AVOID getting caught in a DDOS meant for someone else (not prevent)?
Dec
22
answered ssd performance against hdd performance
Dec
18
accepted In Active Directory, how do I delegate write permissions on specific attributes of protected user accounts?
Dec
18
awarded  Nice Question
Dec
18
revised Nginx rewrite to eliminate “www” not working
deleted 136 characters in body
Dec
17
answered Can't checkout SVN repository; Server doesn't receive request
Dec
17
reviewed Approve Nginx rewrite to eliminate “www” not working
Dec
17
comment Keepalived configuration for VRRP
@AbhishekChanda My guess is the rather conservative default is for compatibility reasons. In a case where you're failing back and forth rapidly (usually due to communication problems between the VRRP nodes) you don't want both nodes spewing GARP constantly - I've seen network devices start completely ignoring ARP from an offending IP address in those kinds of cases.
Dec
17
comment Apache causing huge load, how to pin down the reason?
@Greg You'll need to be logging it - either by having separate log files per virtual host, or by putting the hostname in the log format. Check what your current logs look like.
Dec
17
comment Cisco PIX 501 and jumbo frames
@RaymondHolguin Yes, it's accurate - jumbo frames aren't really "on" unless the systems in the network are sending them, regardless of what the switches are configured to handle.
Dec
17
awarded  Enlightened
Dec
17
awarded  Nice Answer
Dec
17
answered Cisco PIX 501 and jumbo frames
Dec
16
answered Apache causing huge load, how to pin down the reason?
Dec
16
answered Keepalived configuration for VRRP
Dec
16
answered Need redundant IIS server
Dec
14
comment Nginx proxy to Go dramatically reduces performance
Ok, then the bottleneck's almost certainly in the proxying - can you try having Go listen for HTTP on a unix socket and point nginx at that so it's not going through the work of dealing with TCP?
Dec
14
comment Nginx proxy to Go dramatically reduces performance
Hmm. How about if you use an upstream with something like keepalive 64;? Also, as a test, see how many reqs/second your nginx serves when just requesting a tiny file that doesn't get proxied to Go?
Dec
14
comment Nginx proxy to Go dramatically reduces performance
If you turn the concurrency down to, say, 10, are the results much closer together?
Dec
14
revised “Quarterly round trip to populate the cloud”
added 96 characters in body