* [ECOS] "Fix" for atHTTP and HTTP socket requirements with mozilla POSTS
@ 2007-06-13 6:56 Tad
0 siblings, 0 replies; 3+ messages in thread
From: Tad @ 2007-06-13 6:56 UTC (permalink / raw)
To: ecos-discuss
<Reposted to get correct thread>
"Fix" for hanging atHTTP client requests on out-of-sockets.
Background:
It's somewhat known that atHTTP will "pause" for several minutes when
running out of sockets. One reason this can happen is that mozilla
opens a new TCP connection for each POST or chunked-transfer(I think)
GET, which requires a new socket for each. The remnant sockets
eventually (300sec default) are shutdown by atHTTP and then enter TCP
TIME_WAIT state which is 2xMSL or something like another 2-4 minutes --
but that's a long time. BTW, this assumes you don't hit the bug where
accept() hangs when out of sockets. See solution in a couple days for
that.
"Solution:"
Mozilla (on XP) appears to get smart after opening about 10 TCP
connections, and starts FIN,ACK ing them to shut them down so atHTTP
doesn't have to sit in TIME_WAIT or atHTTP timeout on the old connections.
So, setting CYGPKG_NET_MAXSOCKETS to something > 10x # of users + a
couple for sockets other eCos apps have open will allow "unlimited"
mozilla (XP) client requests without any timeouts.
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [ECOS] "Fix" for atHTTP and HTTP socket requirements with mozilla POSTS
@ 2007-06-15 12:51 Tad
0 siblings, 0 replies; 3+ messages in thread
From: Tad @ 2007-06-15 12:51 UTC (permalink / raw)
To: ecos-discuss
IE6 appears to use just original connection for all POSTS/GETS.
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 3+ messages in thread
* [ECOS] "Fix" for atHTTP and HTTP socket requirements with mozilla POSTS
[not found] ` <466F2FC7.8060704@ds3switch.com>
@ 2007-06-13 0:09 ` Tad
0 siblings, 0 replies; 3+ messages in thread
From: Tad @ 2007-06-13 0:09 UTC (permalink / raw)
To: ecos-discuss
"Fix" for hanging atHTTP client requests on out-of-sockets.
Background:
It's somewhat known that atHTTP will "pause" for several minutes when
running out of sockets. One reason this can happen is that mozilla
opens a new TCP connection for each POST or chunked-transfer(I think)
GET, which requires a new socket for each. The remnant sockets
eventually (300sec default) are shutdown by atHTTP and then enter TCP
TIME_WAIT state which is 2xMSL or something like another 2-4 minutes --
but that's a long time. BTW, this assumes you don't hit the bug where
accept() hangs when out of sockets. See solution in a couple days for
that.
"Solution:"
Mozilla (on XP) appears to get smart after opening about 10 TCP
connections, and starts FIN,ACK ing them to shut them down so atHTTP
doesn't have to sit in TIME_WAIT or atHTTP timeout on the old connections.
So, setting CYGPKG_NET_MAXSOCKETS to something > 10x # of users + a
couple for sockets other eCos apps have open will allow "unlimited"
mozilla (XP) client requests without any timeouts.
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2007-06-15 8:59 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2007-06-13 6:56 [ECOS] "Fix" for atHTTP and HTTP socket requirements with mozilla POSTS Tad
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2007-06-15 12:51 Tad
2007-06-11 23:15 [ECOS] Re: accept() FreeBSD hangs when out of resources Tad
2007-06-12 3:51 ` Andrew Lunn
2007-06-12 4:05 ` [ECOS] " Tad
2007-06-12 11:06 ` Andrew Lunn
2007-06-12 11:19 ` Andrew Lunn
[not found] ` <466F2FC7.8060704@ds3switch.com>
2007-06-13 0:09 ` [ECOS] "Fix" for atHTTP and HTTP socket requirements with mozilla POSTS Tad
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