Re: [us...@httpd] Some VirtualHosts extremely slow, others very fast

2010-12-09 Thread Igor Galić
- "Craig A. James" wrote: > I have found the trigger for my horrible performance problem, but it > is surprising. > > Apache gets slow when there are too many "Allow from" directives, in > this case, about 105 "Allow from" specs that are a mix of single IP > addresses, partial IP address an

Re: [us...@httpd] Some VirtualHosts extremely slow, others very fast

2010-12-09 Thread Craig A. James
I have found the trigger for my horrible performance problem, but it is surprising. Apache gets slow when there are too many "Allow from" directives, in this case, about 105 "Allow from" specs that are a mix of single IP addresses, partial IP address and netmasks: 11.12.13.14 21.22. 21.1

Re: [us...@httpd] Some VirtualHosts extremely slow, others very fast

2010-12-09 Thread Craig A. James
On 12/8/10 10:15 PM, Igor Cicimov wrote: Check the dns resolution for the xyz host. There is no problem with DNS. All of the subdomains use the wildcard *.ourdomain.com, which resolves to both www and xzy. The problem isn't with DNS. Each TCP/IP conversation starts instantly. But with xyz

Re: [us...@httpd] Some VirtualHosts extremely slow, others very fast

2010-12-08 Thread Igor Cicimov
Check the dns resolution for the xyz host. Sent from my phone On Dec 9, 2010 1:24 PM, "Craig A. James" wrote: We operate one public web site and about 20 private web sites. They're all the same server, running the same Apache server instance (2.2.14-5ubuntu8.3). Most customers get excellent p

[us...@httpd] Some VirtualHosts extremely slow, others very fast

2010-12-08 Thread Craig A. James
We operate one public web site and about 20 private web sites. They're all the same server, running the same Apache server instance (2.2.14-5ubuntu8.3). Most customers get excellent performance, but two customers get terrible response times, but only on *some* of the VirtualHosts. They get ex