Ema has uploaded a new change for review. (
https://gerrit.wikimedia.org/r/349188 )
Change subject: cache_upload: don't cache tiny objects at the backend layer
......................................................................
cache_upload: don't cache tiny objects at the backend layer
Don not cache objects with CL < 256B at the backend layer.
Full rationale here: T145661#3197012.
Bug: T145661
Change-Id: I74688d43748a5b1eaf0d3ed2a763b3d093f5f109
---
M modules/varnish/templates/upload-backend.inc.vcl.erb
1 file changed, 7 insertions(+), 0 deletions(-)
git pull ssh://gerrit.wikimedia.org:29418/operations/puppet
refs/changes/88/349188/1
diff --git a/modules/varnish/templates/upload-backend.inc.vcl.erb
b/modules/varnish/templates/upload-backend.inc.vcl.erb
index 66fd12a..96acf70 100644
--- a/modules/varnish/templates/upload-backend.inc.vcl.erb
+++ b/modules/varnish/templates/upload-backend.inc.vcl.erb
@@ -56,6 +56,13 @@
sub cluster_be_backend_response_early { }
sub cluster_be_backend_response {
+ // hit-for-pass objects < 256B size (T145661)
+ if (std.integer(beresp.http.Content-Length, 256) < 256) {
+ set beresp.http.X-CDIS = "pass";
+ set beresp.uncacheable = true;
+ return (deliver);
+ }
+
call pick_stevedore;
if (beresp.http.Content-Range) {
--
To view, visit https://gerrit.wikimedia.org/r/349188
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: I74688d43748a5b1eaf0d3ed2a763b3d093f5f109
Gerrit-PatchSet: 1
Gerrit-Project: operations/puppet
Gerrit-Branch: production
Gerrit-Owner: Ema <[email protected]>
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