I set up a jmeter test to open a socket to Apache HTTP, request a very small file, and close the socket. Jmeter is running on the same box as the Apache HTTP service. At 2 sockets/second, there is a 3% error rate. At 5 sockets/second, the error rate increases to 8%. Failures occur at regular intervals. With 2 sockets/second failure is about every 20 minutes. With 5 sockets/second, failure is at 15 minute intervals. In a separate jmeter test, I set up 1300 concurrent requests with a delay between each run. Failure occurred within just a few seconds. The symptoms were much worse with this test. Symptoms were very much like a denial of service. When I open a browser and manually download the small file, the browser spins and never returns with a response. I have tried tweaking the Windows registry and the httpd.conf file to improve performance, but nothing seems to help. Relevant tweaks from httpd.conf are shown below. ThreadLimit 3600 ThreadsPerChild 3200 I also tried the following to improve reliability, but it made no difference. EnableMMAP off EnableSendfile off Win32DisableAcceptEx Has anyone else observed these problems? Is there anything that can be done to improve reliability or performance? Thanks. Joe --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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