Sven Vermeulen wrote:
Hi all,We're trying to deploy an environment on a two 1.5Ghz PIV with 4Gb of memory. However, we're noticing that we quickly reach a maximum load for SSL-requests on the webserver alone. We maxed out on around 1800 active HTTPS sessions who generated around 130 requests (GET/POST) per second. Is this to be expected for this configuration? A higher load drops connections (the SSL cache can't handle more load), our number of Apache clients/threads scales well - we have an average of 320 threads (13 processes, each 25 threads) at any point of time. We are using the plain Apache (2.0) with the built-in SSL support. Wkr, Sven Vermeulen
At high load, are you experiencing high load average? Are you seeing high I/O on the partition with Apache? Although you mentioned SSL cache, you didn't mention the value of SSLSessionCache in your config. You will find that with high-concurrency hosting, 'dbm' or 'none' won't cut it - switch to shm instead, and give it some healthy space: SSLSessionCache shm:/path/to/session/file(2048000) Also consider disabling logging to minimize I/O. Thanks, Josh -- [email protected] mailing list
