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From Ruediger Pluem <>
Subject Re: ssl coalescing filter too aggressive?
Date Tue, 29 Jun 2021 13:42:22 GMT

On 6/29/21 3:16 PM, Stefan Eissing wrote:
> Could someone with understanding of the mod_ssl output filters have a look at:
> It looks as if HTTP/2 frames are buffered. The browser sees a TimeToFirstByte of 12 seconds,
but the server logs show that the frame data was put into the connection output filters shortly
after the request started - accompanied by a FLUSH buckets.

Hm, from memory and a quick look at ssl_io_filter_coalesce flush buckets should cause the
coalesce filter to pass down everything
down the filter chain.



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