At $WORK we were running a MySQL setup that required an unusually large number of concurrent connections. Most of them were idle. Only a few dozen connections were running queries. The total number of connections was around twelve thousand and was growing slowly. When the total number of connections reached close to 12,200, things started to break. New clients could no longer connect to the database. The error in the MySQL log was: ...
http://www.quora.com/How-should-startups-handle-performance-reviews/ great opinions on dreaded APRs
https://istlsfastyet.com/ Published on Jul 24, 2014 “TLS has exactly one performance problem: not enough sites are using it. Everything else can and will be optimized. A hands on look at how to achieve 1-RTT handshakes, eliminate validation latency, and more.” Slides: bit.ly/fastTLS by Ilya Grigorik ( @ google) . See the bottom of the page on Nginx configs on how to improve TLS performance
https://community.openvpn.net/openvpn/wiki/Gigabit_Networks_Linux Notes about OpenVPN performance testing. Results, in short: easy to saturate 100Mbit network on common hardware. Possible to do a near wire-line speed on 1Gbit network (needs recent version of openssl-1.0a, fresh intel CPU that does AES in hardware AES-NI, and “–engine aesni” option passed to OpenVPN. 10Gbit – depends on hardware option, raw software speed is ~ 3.5Gb
http://www.intelcloudbuilders.com/docs/IBC_RA_Unified%20Networking_iSCSI_Linux.pdf Notes describing iSCSI test between RHEL 6 and NetApp FAS6240 (RHEL6 w Intel X520 2x10GbE -> Cisco Nexus 10GbE switch -> FlexVlume / FAS6240 )
http://www.intelcloudbuilders.com/docs/IBC_RA_Unified%20Networking_iSCSI_Linux.pdf Notes describing iSCSI test between RHEL 6 and NetApp FAS6240 (RHEL6 w Intel X520 2x10GbE -> Cisco Nexus 10GbE switch -> FlexVlume / FAS6240 )
http://www.intelcloudbuilders.com/docs/IBC_RA_Unified%20Networking_iSCSI_Linux.pdf Notes describing iSCSI test between RHEL 6 and NetApp FAS6240 (RHEL6 w Intel X520 2x10GbE -> Cisco Nexus 10GbE switch -> FlexVlume / FAS6240 )
https://gist.github.com/0b3b52050254e273ff11 Example of high performance nginx config (no SSL), for single server hardware, ~ 0.5M client connections. (found on nginx mailing list)
https://gist.github.com/0b3b52050254e273ff11 Example of high performance nginx config (no SSL), for single server hardware, ~ 0.5M client connections. (found on nginx mailing list)
https://gist.github.com/0b3b52050254e273ff11 Example of high performance nginx config (no SSL), for single server hardware, ~ 0.5M client connections. (found on nginx mailing list)