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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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,242 @@ | ||
| #!/usr/bin/env escript | ||
| %% -*- erlang -*- | ||
|
|
||
| % 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. | ||
|
|
||
| -record(user_ctx, { | ||
| name = null, | ||
| roles = [], | ||
| handler | ||
| }). | ||
|
|
||
| -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 | ||
| }). | ||
|
|
||
| -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 = [] | ||
| }). | ||
|
|
||
| test_db_name() -> <<"couch_test_view_group_db_leaks">>. | ||
| ddoc_name() -> <<"foo">>. | ||
|
|
||
| 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. | ||
|
|
||
| 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"), | ||
|
|
||
| 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. | ||
|
|
||
| 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. | ||
|
|
||
| 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} | ||
|
|
||
| ]}), | ||
| 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). | ||
|
|
||
| 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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