Mercurial > hg > nginx
changeset 7767:6d98f29867e8
Additional connections reuse.
If ngx_drain_connections() fails to immediately reuse any connections
and there are no free connections, it now additionally tries to reuse
a connection again. This helps to provide at least one free connection
in case of HTTP/2 with lingering close, where merely trying to reuse
a connection once does not free it, but makes it reusable again,
waiting for lingering close.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Thu, 11 Feb 2021 21:52:11 +0300 |
parents | 3e83336cda5b |
children | fc536dcdbbf7 |
files | src/core/ngx_connection.c |
diffstat | 1 files changed, 16 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/src/core/ngx_connection.c Thu Feb 11 21:52:09 2021 +0300 +++ b/src/core/ngx_connection.c Thu Feb 11 21:52:11 2021 +0300 @@ -1310,6 +1310,7 @@ cycle->connection_n); } + c = NULL; n = ngx_max(ngx_min(32, cycle->reusable_connections_n / 8), 1); for (i = 0; i < n; i++) { @@ -1326,6 +1327,21 @@ c->close = 1; c->read->handler(c->read); } + + if (cycle->free_connection_n == 0 && c && c->reusable) { + + /* + * if no connections were freed, try to reuse the last + * connection again: this should free it as long as + * previous reuse moved it to lingering close + */ + + ngx_log_debug0(NGX_LOG_DEBUG_CORE, c->log, 0, + "reusing connection again"); + + c->close = 1; + c->read->handler(c->read); + } }