Mailing List Archive

ssl coalescing filter too aggressive?
Could someone with understanding of the mod_ssl output filters have a look at: https://bz.apache.org/bugzilla/show_bug.cgi?id=65402

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.

Thanks, Stefan
Re: ssl coalescing filter too aggressive? [ In reply to ]
On 6/29/21 3:16 PM, Stefan Eissing wrote:
> Could someone with understanding of the mod_ssl output filters have a look at: https://bz.apache.org/bugzilla/show_bug.cgi?id=65402
>
> 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.

Regards

RĂ¼diger