incubator-couchdb-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Adam Kocoloski <adam.kocolo...@gmail.com>
Subject increasing ERL_MAX_PORTS
Date Wed, 05 Nov 2008 20:10:24 GMT
Hi all, I noticed that under high concurrency the Erlang emulator  
running CouchDB occasionally hits a limit on the number of available  
ports during a view query.  I included an example error_report from  
the server log  below.  When I increased ERL_MAX_PORTS to 50000  
(chosen ~arbitrarily) the crashes disappeared.  Hope it helps,

Adam

> [Wed, 05 Nov 2008 18:33:02 GMT] [error] [<0.13117.27>]  
> {error_report,<0.21.0>,
>     {<0.13117.27>,crash_report,
>      [[{pid,<0.13117.27>},
>        {registered_name,[]},
>        {error_info,
>            {error,system_limit,
>                [{erlang,open_port,[{spawn,"couch_erl_driver"},[]]},
>                 {couch_util,drv_port,0},
>                 {couch_util,collate,3},
>                 {couch_view,less_same_type,2},
>                 {couch_view,less_list,2},
>                 {lists,dropwhile,2},
>                 {couch_btree,reduce_stream_kp_node,11},
>                 {couch_btree,fold_reduce,7}]}},
>        {initial_call,
>            {mochiweb_socket_server,acceptor_loop,
>                [{<0.58.0>,#Port<0.148>,#Fun<mochiweb_http. 
> 1.62821608>}]}},
>        {ancestors,[couch_httpd,<0.53.0>,couch_server_sup,<0.1.0>]},
>        {messages,[]},
>        {links,[<0.58.0>,#Port<0.546707>]},
>        {dictionary,
>            [{mochiweb_request_qs,
>                 [{"group","true"},{"key","\"obama\""}]},
>             {mochiweb_request_force_close,true}]},
>        {trap_exit,false},
>        {status,running},
>        {heap_size,2584},
>        {stack_size,23},
>        {reductions,2484}],
>       []]}}

Mime
View raw message