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author | Paul J. Davis <paul.joseph.davis@gmail.com> | 2018-09-18 15:39:34 -0500 |
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committer | Paul J. Davis <paul.joseph.davis@gmail.com> | 2020-01-04 15:17:42 -0600 |
commit | 075dff57c481f2ea40ea752195ae955df5d95c03 (patch) | |
tree | f7caddd8f66c98c35dfcfab7c867162d8a198bd9 | |
parent | bb0dcbc6c9df54adfbf35fdc11f02b13c9001bbb (diff) | |
download | couchdb-075dff57c481f2ea40ea752195ae955df5d95c03.tar.gz |
Reduce logging calls in couch_server
Even when disabled these logs can take a non-trivial amount of
reductions which can add extra suspensions to couch_server's main loop.
-rw-r--r-- | src/couch/src/couch_server.erl | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/couch/src/couch_server.erl b/src/couch/src/couch_server.erl index ab0122eec..f76fd5ac5 100644 --- a/src/couch/src/couch_server.erl +++ b/src/couch/src/couch_server.erl @@ -369,7 +369,13 @@ open_async(Server, From, DbName, {Module, Filepath}, Options) -> ok end, gen_server:call(Parent, {open_result, T0, DbName, Res}, infinity), - unlink(Parent) + unlink(Parent), + case Res of + {ok, _} -> + ok; + Error -> + couch_log:info("open_result error ~p for ~s", [Error, DbName]) + end end), ReqType = case lists:member(create, Options) of true -> create; @@ -455,7 +461,6 @@ handle_call({open_result, _T0, DbName, Error}, {Opener, _}, Server) -> {reply, ok, Server}; [#entry{pid = Opener, req_type = ReqType, waiters = Waiters} = Entry] -> [gen_server:reply(Waiter, Error) || Waiter <- Waiters], - couch_log:info("open_result error ~p for ~s", [Error, DbName]), true = ets:delete(couch_dbs, DbName), true = ets:delete(couch_dbs_pid_to_name, Opener), NewServer = case ReqType of @@ -488,7 +493,8 @@ handle_call({open, DbName, Options}, From, Server) -> end; [#entry{waiters = Waiters} = Entry] when is_list(Waiters) -> true = ets:insert(couch_dbs, Entry#entry{waiters = [From | Waiters]}), - if length(Waiters) =< 10 -> ok; true -> + NumWaiters = length(Waiters), + if NumWaiters =< 10 orelse NumWaiters rem 10 /= 0 -> ok; true -> Fmt = "~b clients waiting to open db ~s", couch_log:info(Fmt, [length(Waiters), DbName]) end, @@ -628,7 +634,12 @@ handle_info({'EXIT', Pid, Reason}, Server) -> "must be built with Erlang OTP R13B04 or higher.", [DbName]), couch_log:error(Msg, []) end, - couch_log:info("db ~s died with reason ~p", [DbName, Reason]), + % We kill databases on purpose so there's no reason + % to log that fact. So we restrict logging to "interesting" + % reasons. + if Reason == normal orelse Reason == killed -> ok; true -> + couch_log:info("db ~s died with reason ~p", [DbName, Reason]) + end, if not is_list(Waiters) -> ok; true -> [gen_server:reply(Waiter, Reason) || Waiter <- Waiters] end, |