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Reduce the number of tcp time_wait structs to maxsockets / 5; this ensures

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that at most 20% of sockets can be in time_wait at one time, ensuring
that time_wait sockets do not starve real connections from inpcb
structures.

No implementation change is needed, jlemon already implemented a nice
LRU-ish algorithm for tcp_tw structure recycling.

This should reduce the need for sysadmins to lower the default msl on
busy servers.
This commit is contained in:
Mike Silbersack 2003-10-24 05:44:14 +00:00
parent f47392f4c2
commit 0709c23335
2 changed files with 2 additions and 2 deletions
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2
sys/netinet/tcp_subr.c
View File

@ -259,7 +259,7 @@ tcp_init()
uma_zone_set_max(tcpcb_zone, maxsockets);
tcptw_zone = uma_zcreate("tcptw", sizeof(struct tcptw),
NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
uma_zone_set_max(tcptw_zone, maxsockets);
uma_zone_set_max(tcptw_zone, maxsockets / 5);
tcp_timer_init();
syncache_init();
}

2
sys/netinet/tcp_timewait.c
View File

@ -259,7 +259,7 @@ tcp_init()
uma_zone_set_max(tcpcb_zone, maxsockets);
tcptw_zone = uma_zcreate("tcptw", sizeof(struct tcptw),
NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
uma_zone_set_max(tcptw_zone, maxsockets);
uma_zone_set_max(tcptw_zone, maxsockets / 5);
tcp_timer_init();
syncache_init();
}