Today we noticed something strange after updating our HAProxy to 1.7.9. A request which took a mere second before now takes a whopping 45 seconds.
After some playing around, we found that if we turned off the compression on HAProxy it was back to fast again. We are running HA-Proxy version 1.7.9-1ppa1~trusty 2017/08/19 on Ubuntu 14.04. Our compression configuration: compression algo gzip compression type text/html text/plain text/css image/svg+xml text/xml application/xml application/javascript application/json application/pdf Without compression: $ curl --user user:pass https://host/path/to/pdf -o /tmp/pdf -D headers -H "Accept-Encoding: gzip" % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 137k 0 137k 0 0 64537 0 --:--:-- 0:00:02 --:--:-- 65102 $ cat headers HTTP/1.1 200 OK X-Powered-By: Undertow/1 X-Powered-By: Undertow/1 Set-Cookie: JSESSIONID=sessionid; path=/; HttpOnly; Max-Age=36000; Expires=Thu, 31-Aug-2017 22:10:49 GMT Set-Cookie: access_token=eyJjdHkiOiJKV1QiLCJlbmMiOiJBMjU2R0NNIiwiYWxnIjoiZGlyIn0..v5kb6ns9zt7F0_3F.fPNbj9CWN9gfpCHR8--tfse2xEKDEM22hsSUCIF0KNRTq9pjd3Tl84fAl_tN9rO66ScYaoIMwvgeb89sGV_mYoTG1myJvbVF26RXXTToa3oOCTL9LzqD9pbAa08CSUSS7YEhP5ia7XawX5G2uWqM9qk6nxet-ESDtAN9HRTKeX9UlPwMHcD7Kkow76F2btlZyxoelO0xqnuTt9C1r0_uVxWhOPdcbmdJLB_UrJr6IQpLPsSPf7TgAZVdDwVo7imm8O4eTIModtuVllXEq3dAk5PF5SHhg8W1iFl5Pw.3ssYrnKKFRiZNeP0g9baZQ; path=/; Max-Age=36000; Expires=Thu, 31-Aug-2017 22:10:49 GMT Access-Control-Allow-Headers: origin, content-type, accept, authorization Server: WildFly/10 Server: WildFly/10 Content-Disposition: inline; filename=OBE_11_Bodegraven - Woerden_000200804_O.pdf Date: Thu, 31 Aug 2017 12:10:49 GMT Connection: close Access-Control-Allow-Origin: * Vary: Accept Access-Control-Allow-Credentials: true Content-Type: application/pdf Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS, HEAD Access-Control-Max-Age: 1209600 Strict-Transport-Security: max-age=63072000; includeSubDomains; preload; With compression: $ curl --user nick.user:pass https://host/path/to/pdf -o /tmp/pdf -D headers -H "Accept-Encoding: gzip" % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 137k 0 137k 0 0 3078 0 --:--:-- 0:00:45 --:--:-- 39398 $ cat headers HTTP/1.1 200 OK X-Powered-By: Undertow/1 X-Powered-By: Undertow/1 Set-Cookie: JSESSIONID=sessionid; path=/raildocs; HttpOnly; Max-Age=36000; Expires=Thu, 31-Aug-2017 22:12:24 GMT Set-Cookie: access_token=eyJjdHkiOiJKV1QiLCJlbmMiOiJBMjU2R0NNIiwiYWxnIjoiZGlyIn0..RcxVSV-cJB7rTq6N.JupirTzLtU6KhCmswAiejWvC13pVciJ01br_XRoMvhlXk3j7db3hshhh7eo5OjgOkUgNxyGplE3ohvC8xXCYSUKAfcCeYYe3_9VCY28eLoJ0TgO63uzLwI77kgek2Qd1dVMAWl-y3B9sWt33irlBPaJLUaT2GEG53EQ1hrqyLD8mGHzw5qRZhDrCFCWxJbvHVQvnXn9btkcxFGHBIlfC887UShTR05WywXo31fNJGDJa6R9a0dbe1hr5mp-O30dpTezRrfmrrbK8NILHmcJBEQiYhjUXk6rRk9LIsA.I6oBuk3Gw4h41C0D9hz52A; path=/; Max-Age=36000; Expires=Thu, 31-Aug-2017 22:12:24 GMT Access-Control-Allow-Headers: origin, content-type, accept, authorization Server: WildFly/10 Server: WildFly/10 Content-Disposition: inline; filename=OBE_11_Bodegraven - Woerden_000200804_O.pdf Date: Thu, 31 Aug 2017 12:12:24 GMT Connection: close Access-Control-Allow-Origin: * Vary: Accept Access-Control-Allow-Credentials: true Content-Type: application/pdf Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS, HEAD Access-Control-Max-Age: 1209600 Strict-Transport-Security: max-age=63072000; includeSubDomains; preload; Does someone has an idea why we see this degrade in performance. What are we doing wrong? Thanks in advance, Nick Stolwijk ~~~ Try to leave this world a little better than you found it and, when your turn comes to die, you can die happy in feeling that at any rate you have not wasted your time but have done your best ~~~ Lord Baden-Powell
