03/04: nginx: hydra.gnu.org: Reduce the proxy timeouts.

[Ludovic Courtès]

civodul pushed a commit to branch master
in repository maintenance.

commit 8055ddf5d0ce2b8b1648f58013a900091bce82f2
Author: Ludovic Courtès <address@hidden>
Date:   Thu Mar 17 15:19:31 2016 +0100

    nginx: hydra.gnu.org: Reduce the proxy timeouts.
---
 hydra/nginx/hydra.gnu.org-locations.conf |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/hydra/nginx/hydra.gnu.org-locations.conf 
b/hydra/nginx/hydra.gnu.org-locations.conf
index 3c9b1df..6f0fbe9 100644
--- a/hydra/nginx/hydra.gnu.org-locations.conf
+++ b/hydra/nginx/hydra.gnu.org-locations.conf
@@ -61,9 +61,18 @@ location ~ \.narinfo$ {
     # For HTTP pipelining.  This has a dramatic impact on performance.
     client_body_buffer_size 128k;
 
+    # Do not tolerate slowness of hydra.gnu.org when fetching
+    # narinfos: better return 504 quickly than wait forever.  However,
+    # since hydra.gnu.org is often overloaded, keep the timeouts not
+    # too small.
+    proxy_connect_timeout 4s;
+    proxy_read_timeout 6s;
+    proxy_send_timeout 6s;
+
     # Enable caching for narinfo files, to avoid recomputing nar signatures.
     proxy_cache narinfo;
     proxy_cache_valid 200 7d;   # cache hits for 7 days.
+    proxy_cache_valid 504 2m;  # timeout, when hydra.gnu.org is overloaded
     proxy_cache_valid any 1m;   # cache misses/others for 1 min.
 
     # Add 'Expires' and 'Cache-Control' response headers so clients