feat(fastly): Allow adjust max_conn#448
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bkochendorfer merged 2 commits intomainfrom Mar 18, 2026
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We are seeing Fastly errors with `max_conn`, need to be able to adjust this for high throughput services. ```bash HTTP/2 503 content-type: text/html; charset=utf-8 via: 1.1 varnish, 1.1 varnish accept-ranges: bytes retry-after: 0 server: Varnish date: Wed, 18 Mar 2026 13:52:35 GMT x-served-by: cache-bfi-kbfi7400023-BFI, cache-bfi-kbfi7400023-BFI x-cache: MISS, MISS x-cache-hits: 0, 0 x-timer: S1773841955.060108,VS0,VE26 content-length: 470 <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <title>503 Backend.max_conn reached</title> </head> <body> <h1>Error 503 Backend.max_conn reached</h1> <p>Backend.max_conn reached</p> <h3>Error 54113</h3> <p>Details: cache-bfi-kbfi7400023-BFI 1773841955 1100143237</p> <hr> <p>Varnish cache server</p> </body> </html> ``` (cherry picked from commit 077be02)
bkochendorfer
requested review from
Tibap,
jasonthomas,
jbuck and
whd
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jasonthomas
previously approved these changes
Mar 18, 2026
grahamalama
previously approved these changes
Mar 18, 2026
bkochendorfer
dismissed stale reviews from grahamalama and jasonthomas
via
e17c770
jasonthomas
approved these changes
Mar 18, 2026
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Description
We are seeing Fastly errors with
max_conn, need to be able to adjust this for high throughput services.