Tools/SCViewer
Tools
/
SCViewer
10
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

improved write performance of SQLite db

This commit is contained in:
Eyck Jentzsch 2015-01-25 14:47:07 +01:00
parent 5d8d81a237
commit efced9bb87
1 changed files with 9 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
scv_tr_sqlite/src/scv_tr_sqlite.cpp
View File

@ -103,7 +103,12 @@ static void dbCb(const scv_tr_db& _scv_tr_db, scv_tr_db::callback_reason reason,
fName+=".txdb";
remove(fName.c_str());
db.open(fName.c_str());
// scv_out << "TB Transaction Recording has started, file = " << my_sqlite_file_name << endl;
// performance related according to http://blog.quibb.org/2010/08/fast-bulk-inserts-into-sqlite/
db.exec("PRAGMA synchronous=OFF");
db.exec("PRAGMA count_changes=OFF");
db.exec("PRAGMA journal_mode=MEMORY");
db.exec("PRAGMA temp_store=MEMORY");
// scv_out << "TB Transaction Recording has started, file = " << my_sqlite_file_name << endl;
db.exec("CREATE TABLE IF NOT EXISTS " STREAM_TABLE "(id INTEGER NOT NULL PRIMARY KEY, name TEXT, kind TEXT);");
db.exec("CREATE TABLE IF NOT EXISTS " GENERATOR_TABLE "(id INTEGER NOT NULL PRIMARY KEY, stream INTEGER REFERENCES " STREAM_TABLE "(id), name TEXT, begin_attr INTEGER, end_attr INTEGER);");
db.exec("CREATE TABLE IF NOT EXISTS " TX_TABLE "(id INTEGER NOT NULL PRIMARY KEY, generator INTEGER REFERENCES " GENERATOR_TABLE "(id), stream INTEGER REFERENCES " STREAM_TABLE "(id), concurrencyLevel INTEGER);");
@ -111,6 +116,7 @@ static void dbCb(const scv_tr_db& _scv_tr_db, scv_tr_db::callback_reason reason,
db.exec("CREATE TABLE IF NOT EXISTS " TX_ATTRIBUTE_TABLE "(tx INTEGER REFERENCES " TX_TABLE "(id), type INTEGER, name TEXT, data_type INTEGER, data_value TEXT);");
db.exec("CREATE TABLE IF NOT EXISTS " TX_RELATION_TABLE "(name TEXT, src INTEGER REFERENCES " TX_TABLE "(id), sink INTEGER REFERENCES " TX_TABLE "(id));");
db.exec("CREATE TABLE IF NOT EXISTS " SIM_PROPS "(time_resolution INTEGER);");
db.exec("BEGIN TRANSACTION");
queryBuilder.str("");
queryBuilder << "INSERT INTO " SIM_PROPS " (time_resolution) values ("
<< (long)(sc_get_time_resolution().to_seconds()*1e15) << ");";
@ -121,7 +127,8 @@ static void dbCb(const scv_tr_db& _scv_tr_db, scv_tr_db::callback_reason reason,
break;
case scv_tr_db::DELETE:
try {
// scv_out << "Transaction Recording is closing file: " << my_sqlite_file_name << endl;
// scv_out << "Transaction Recording is closing file: " << my_sqlite_file_name << endl;
db.exec("COMMIT TRANSACTION");
db.close();
} catch (SQLiteDB::SQLiteException& e) {
_scv_message::message(_scv_message::TRANSACTION_RECORDING_INTERNAL, "Can't close recording file");
@ -365,4 +372,3 @@ void scv_tr_sqlite_init() {
scv_tr_handle::register_relation_cb(relationCb);
}
// ----------------------------------------------------------------------------