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View groups: only open the databases when needed
View groups keep the databases open all the time. This is a problem once the server reaches max_dbs_open open databases, as it prevents the server from closing inactive databases via the LRU system. Closes COUCHDB-1138. git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@1096252 13f79535-47bb-0310-9956-ffa450edef68
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#!/usr/bin/env escript | ||
%% -*- erlang -*- | ||
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% Licensed under the Apache License, Version 2.0 (the "License"); you may not | ||
% use this file except in compliance with the License. You may obtain a copy of | ||
% the License at | ||
% | ||
% http://www.apache.org/licenses/LICENSE-2.0 | ||
% | ||
% Unless required by applicable law or agreed to in writing, software | ||
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | ||
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the | ||
% License for the specific language governing permissions and limitations under | ||
% the License. | ||
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-record(user_ctx, { | ||
name = null, | ||
roles = [], | ||
handler | ||
}). | ||
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-define(LATEST_DISK_VERSION, 6). | ||
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-record(db_header, | ||
{disk_version = ?LATEST_DISK_VERSION, | ||
update_seq = 0, | ||
unused = 0, | ||
fulldocinfo_by_id_btree_state = nil, | ||
docinfo_by_seq_btree_state = nil, | ||
local_docs_btree_state = nil, | ||
purge_seq = 0, | ||
purged_docs = nil, | ||
security_ptr = nil, | ||
revs_limit = 1000 | ||
}). | ||
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-record(db, { | ||
main_pid = nil, | ||
update_pid = nil, | ||
compactor_pid = nil, | ||
instance_start_time, % number of microsecs since jan 1 1970 as a binary string | ||
fd, | ||
updater_fd, | ||
fd_ref_counter, | ||
header = #db_header{}, | ||
committed_update_seq, | ||
fulldocinfo_by_id_btree, | ||
docinfo_by_seq_btree, | ||
local_docs_btree, | ||
update_seq, | ||
name, | ||
filepath, | ||
validate_doc_funs = [], | ||
security = [], | ||
security_ptr = nil, | ||
user_ctx = #user_ctx{}, | ||
waiting_delayed_commit = nil, | ||
revs_limit = 1000, | ||
fsync_options = [], | ||
options = [] | ||
}). | ||
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test_db_name() -> <<"couch_test_view_group_db_leaks">>. | ||
ddoc_name() -> <<"foo">>. | ||
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main(_) -> | ||
test_util:init_code_path(), | ||
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etap:plan(13), | ||
case (catch test()) of | ||
ok -> | ||
etap:end_tests(); | ||
Other -> | ||
etap:diag(io_lib:format("Test died abnormally: ~p", [Other])), | ||
etap:bail(Other) | ||
end, | ||
ok. | ||
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test() -> | ||
couch_server_sup:start_link(test_util:config_files()), | ||
timer:sleep(1000), | ||
put(addr, couch_config:get("httpd", "bind_address", "127.0.0.1")), | ||
put(port, integer_to_list(mochiweb_socket_server:get(couch_httpd, port))), | ||
application:start(inets), | ||
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delete_db(), | ||
create_db(), | ||
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create_docs(), | ||
create_design_doc(), | ||
query_view(), | ||
check_db_ref_count(), | ||
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create_new_doc(<<"doc1000">>), | ||
query_view(), | ||
check_db_ref_count(), | ||
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Ref1 = get_db_ref_counter(), | ||
compact_db(), | ||
check_db_ref_count(), | ||
Ref2 = get_db_ref_counter(), | ||
etap:isnt(Ref1, Ref2, "DB ref counter changed"), | ||
etap:is(false, is_process_alive(Ref1), "old DB ref counter is not alive"), | ||
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compact_view_group(), | ||
check_db_ref_count(), | ||
Ref3 = get_db_ref_counter(), | ||
etap:is(Ref3, Ref2, "DB ref counter didn't change"), | ||
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create_new_doc(<<"doc1001">>), | ||
query_view(), | ||
check_db_ref_count(), | ||
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ok = timer:sleep(1000), | ||
delete_db(), | ||
couch_server_sup:stop(), | ||
ok. | ||
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admin_user_ctx() -> | ||
{user_ctx, #user_ctx{roles=[<<"_admin">>]}}. | ||
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create_db() -> | ||
{ok, #db{main_pid = Pid} = Db} = couch_db:create( | ||
test_db_name(), [admin_user_ctx()]), | ||
put(db_main_pid, Pid), | ||
ok = couch_db:close(Db). | ||
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delete_db() -> | ||
couch_server:delete(test_db_name(), [admin_user_ctx()]). | ||
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compact_db() -> | ||
{ok, Db} = couch_db:open_int(test_db_name(), []), | ||
ok = couch_db:start_compact(Db), | ||
ok = couch_db:close(Db), | ||
wait_db_compact_done(10). | ||
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wait_db_compact_done(0) -> | ||
etap:is(true, false, "DB compaction didn't finish"); | ||
wait_db_compact_done(N) -> | ||
{ok, Db} = couch_db:open_int(test_db_name(), []), | ||
ok = couch_db:close(Db), | ||
case is_pid(Db#db.compactor_pid) of | ||
false -> | ||
ok; | ||
true -> | ||
ok = timer:sleep(500), | ||
wait_db_compact_done(N - 1) | ||
end. | ||
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compact_view_group() -> | ||
ok = couch_view_compactor:start_compact(test_db_name(), ddoc_name()), | ||
wait_view_compact_done(10). | ||
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wait_view_compact_done(0) -> | ||
etap:is(true, false, "view group compaction didn't finish"); | ||
wait_view_compact_done(N) -> | ||
{ok, {{_, Code, _}, _Headers, Body}} = http:request( | ||
get, | ||
{db_url() ++ "/_design/" ++ binary_to_list(ddoc_name()) ++ "/_info", []}, | ||
[], | ||
[{sync, true}]), | ||
etap:is(Code, 200, "got view group info"), | ||
{Info} = ejson:decode(Body), | ||
{IndexInfo} = couch_util:get_value(<<"view_index">>, Info), | ||
CompactRunning = couch_util:get_value(<<"compact_running">>, IndexInfo), | ||
case CompactRunning of | ||
false -> | ||
ok; | ||
true -> | ||
ok = timer:sleep(500), | ||
wait_view_compact_done(N - 1) | ||
end. | ||
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get_db_ref_counter() -> | ||
{ok, #db{fd_ref_counter = Ref} = Db} = couch_db:open_int(test_db_name(), []), | ||
ok = couch_db:close(Db), | ||
Ref. | ||
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check_db_ref_count() -> | ||
{ok, #db{fd_ref_counter = Ref} = Db} = couch_db:open_int(test_db_name(), []), | ||
ok = couch_db:close(Db), | ||
etap:is(couch_ref_counter:count(Ref), 2, | ||
"DB ref counter is only held by couch_db and couch_db_updater"), | ||
ok. | ||
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create_docs() -> | ||
{ok, Db} = couch_db:open(test_db_name(), [admin_user_ctx()]), | ||
Doc1 = couch_doc:from_json_obj({[ | ||
{<<"_id">>, <<"doc1">>}, | ||
{<<"value">>, 1} | ||
]}), | ||
Doc2 = couch_doc:from_json_obj({[ | ||
{<<"_id">>, <<"doc2">>}, | ||
{<<"value">>, 2} | ||
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]}), | ||
Doc3 = couch_doc:from_json_obj({[ | ||
{<<"_id">>, <<"doc3">>}, | ||
{<<"value">>, 3} | ||
]}), | ||
{ok, _} = couch_db:update_docs(Db, [Doc1, Doc2, Doc3]), | ||
couch_db:ensure_full_commit(Db), | ||
couch_db:close(Db). | ||
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create_design_doc() -> | ||
{ok, Db} = couch_db:open(test_db_name(), [admin_user_ctx()]), | ||
DDoc = couch_doc:from_json_obj({[ | ||
{<<"_id">>, <<"_design/", (ddoc_name())/binary>>}, | ||
{<<"language">>, <<"javascript">>}, | ||
{<<"views">>, {[ | ||
{<<"bar">>, {[ | ||
{<<"map">>, <<"function(doc) { emit(doc._id, null); }">>} | ||
]}} | ||
]}} | ||
]}), | ||
{ok, _} = couch_db:update_docs(Db, [DDoc]), | ||
couch_db:ensure_full_commit(Db), | ||
couch_db:close(Db). | ||
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create_new_doc(Id) -> | ||
{ok, Db} = couch_db:open(test_db_name(), [admin_user_ctx()]), | ||
Doc666 = couch_doc:from_json_obj({[ | ||
{<<"_id">>, Id}, | ||
{<<"value">>, 999} | ||
]}), | ||
{ok, _} = couch_db:update_docs(Db, [Doc666]), | ||
couch_db:ensure_full_commit(Db), | ||
couch_db:close(Db). | ||
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db_url() -> | ||
"http://" ++ get(addr) ++ ":" ++ get(port) ++ "/" ++ | ||
binary_to_list(test_db_name()). | ||
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query_view() -> | ||
{ok, {{_, Code, _}, _Headers, _Body}} = http:request( | ||
get, | ||
{db_url() ++ "/_design/" ++ binary_to_list(ddoc_name()) ++ | ||
"/_view/bar", []}, | ||
[], | ||
[{sync, true}]), | ||
etap:is(Code, 200, "got view response"), | ||
ok. |
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