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Made database optimization faster using pragma analysis_limit

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This commit is contained in:
emeric
2023-10-22 00:26:11 +02:00
parent 7d9b5a7084
commit 17efc2759a
8 changed files with 263 additions and 280 deletions
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src/libs/services/database/impl/Db.cpp
+6 -14
View File
@@ -33,33 +33,25 @@ Db::Db(const std::filesystem::path& dbPath, std::size_t connectionCount)
{
LMS_LOG(DB, INFO) << "Creating connection pool on file " << dbPath.string();
std::unique_ptr<Wt::Dbo::backend::Sqlite3> connection {std::make_unique<Wt::Dbo::backend::Sqlite3>(dbPath.string())};
auto connection{ std::make_unique<Wt::Dbo::backend::Sqlite3>(dbPath.string()) };
// connection->setProperty("show-queries", "true");
connection->executeSql("pragma journal_mode=WAL");
connection->executeSql("pragma synchronous=normal");
connection->executeSql("pragma analysis_limit=1000"); // to help make analyze command faster
auto connectionPool = std::make_unique<Wt::Dbo::FixedSqlConnectionPool>(std::move(connection), connectionCount);
connectionPool->setTimeout(std::chrono::seconds(10));
auto connectionPool{ std::make_unique<Wt::Dbo::FixedSqlConnectionPool>(std::move(connection), connectionCount) };
connectionPool->setTimeout(std::chrono::seconds{ 10 });
_connectionPool = std::move(connectionPool);
}
Db::~Db()
{
LMS_LOG(DB, DEBUG) << "Optimizing db...";
executeSql("pragma optimize");
LMS_LOG(DB, DEBUG) << "Optimizing db DONE";
}
void
Db::executeSql(const std::string& sql)
void Db::executeSql(const std::string& sql)
{
ScopedConnection connection{ *_connectionPool };
connection->executeSql(sql);
}
Session&
Db::getTLSSession()
Session& Db::getTLSSession()
{
static thread_local Session* tlsSession{};
src/libs/services/database/impl/Migration.cpp
+4 -9
View File
@@ -654,7 +654,6 @@ CREATE TABLE IF NOT EXISTS "track_backup" (
{41, migrateFromV41},
};
while (1)
{
auto uniqueTransaction{ session.createUniqueTransaction() };
@@ -670,19 +669,14 @@ CREATE TABLE IF NOT EXISTS "track_backup" (
throw LmsException{ outdatedMsg };
}
if (version == LMS_DATABASE_VERSION)
{
LMS_LOG(DB, INFO) << "Lms database version " << LMS_DATABASE_VERSION << ": up to date!";
return;
}
else if (version > LMS_DATABASE_VERSION)
{
if (version > LMS_DATABASE_VERSION)
throw LmsException{ "Server binary outdated, please upgrade it to handle this database" };
}
if (version < migrationFunctions.begin()->first)
throw LmsException{ outdatedMsg };
while (version < LMS_DATABASE_VERSION)
{
LMS_LOG(DB, INFO) << "Migrating database from version " << version << " to " << version + 1 << "...";
auto itMigrationFunc{ migrationFunctions.find(version) };
@@ -695,3 +689,4 @@ CREATE TABLE IF NOT EXISTS "track_backup" (
}
}
}
}
src/libs/services/database/impl/Session.cpp
+16 -16
View File
@@ -83,43 +83,44 @@ SharedTransaction::SharedTransaction(RecursiveSharedMutex& mutex, Wt::Dbo::Sessi
{
}
void
Session::checkUniqueLocked()
void Session::checkUniqueLocked()
{
assert(_db.getMutex().isUniqueLocked());
}
void
Session::checkSharedLocked()
void Session::checkSharedLocked()
{
assert(_db.getMutex().isSharedLocked());
}
UniqueTransaction
Session::createUniqueTransaction()
UniqueTransaction Session::createUniqueTransaction()
{
return UniqueTransaction{ _db.getMutex(), _session };
}
SharedTransaction
Session::createSharedTransaction()
SharedTransaction Session::createSharedTransaction()
{
return SharedTransaction{ _db.getMutex(), _session };
}
void
Session::prepareTables()
void Session::prepareTables()
{
// Creation case
LMS_LOG(DB, INFO) << "Preparing tables...";
// Initial creation case
try
{
_session.createTables();
LMS_LOG(DB, INFO) << "Tables created";
}
catch (Wt::Dbo::Exception& e)
{
LMS_LOG(DB, DEBUG) << "Cannot create tables: " << e.what();
if (std::string_view{ e.what() }.find("already exists") == std::string_view::npos)
{
LMS_LOG(DB, ERROR) << "Cannot create tables: " << e.what();
throw e;
}
}
Migration::doDbMigration(*this);
@@ -176,15 +177,14 @@ Session::prepareTables()
}
}
void
Session::optimize()
void Session::analyze()
{
LMS_LOG(DB, DEBUG) << "Optimizing db...";
LMS_LOG(DB, INFO) << "Analyzing database...";
{
auto uniqueTransaction{ createUniqueTransaction() };
_session.execute("ANALYZE");
}
LMS_LOG(DB, DEBUG) << "Optimized db!";
LMS_LOG(DB, INFO) << "Database Analyze complete";
}
} // namespace Database
src/libs/services/database/include/services/database/Db.hpp
+6 -11
View File
@@ -32,18 +32,15 @@ class Db
{
public:
Db(const std::filesystem::path& dbPath, std::size_t connectionCount = 10);
~Db();
Db(const Db&) = delete;
Db(Db&&) = delete;
Db& operator=(const Db&) = delete;
Db& operator=(Db&&) = delete;
Session& getTLSSession();
void executeSql(const std::string& sql);
private:
Db(const Db&) = delete;
Db& operator=(const Db&) = delete;
friend class Session;
RecursiveSharedMutex& getMutex() { return _sharedMutex; }
@@ -55,14 +52,12 @@ class Db
ScopedConnection(Wt::Dbo::SqlConnectionPool& pool);
~ScopedConnection();
ScopedConnection(const ScopedConnection& ) = delete;
ScopedConnection(ScopedConnection&& ) = delete;
ScopedConnection& operator=(const ScopedConnection& ) = delete;
ScopedConnection& operator=(ScopedConnection&& ) = delete;
Wt::Dbo::SqlConnection* operator->() const;
private:
ScopedConnection(const ScopedConnection&) = delete;
ScopedConnection& operator=(const ScopedConnection&) = delete;
Wt::Dbo::SqlConnectionPool& _connectionPool;
std::unique_ptr<Wt::Dbo::SqlConnection> _connection;
};
src/libs/services/database/include/services/database/Session.hpp
+5 -6
View File
@@ -53,11 +53,7 @@ namespace Database
{
public:
Session(Db& database);
Session(const Session&) = delete;
Session(Session&&) = delete;
Session& operator=(const Session&) = delete;
Session& operator=(Session&&) = delete;
~Session();
[[nodiscard]] UniqueTransaction createUniqueTransaction();
[[nodiscard]] SharedTransaction createSharedTransaction();
@@ -65,7 +61,7 @@ namespace Database
void checkUniqueLocked();
void checkSharedLocked();
void optimize();
void analyze();
void prepareTables(); // need to run only once at startup
@@ -87,6 +83,9 @@ namespace Database
}
private:
Session(const Session&) = delete;
Session& operator=(const Session&) = delete;
Db& _db;
Wt::Dbo::Session _session;
};
src/libs/services/database/test/Common.cpp
+1 -1
View File
@@ -60,7 +60,7 @@ DatabaseFixture::SetUpTestCase()
{
Database::Session s {_tmpDb->getDb()};
s.prepareTables();
s.optimize();
s.analyze();
// remove default created entries
{
src/libs/services/scanner/impl/ScannerService.cpp
+1 -2
View File
@@ -299,8 +299,7 @@ ScannerService::scan(bool forceScan)
LMS_LOG(DBUPDATER, INFO) << "Scan " << (_abortScan ? "aborted" : "complete") << ". Changes = " << stats.nbChanges() << " (added = " << stats.additions << ", removed = " << stats.deletions << ", updated = " << stats.updates << "), Not changed = " << stats.skips << ", Scanned = " << stats.scans << " (errors = " << stats.errors.size() << "), features fetched = " << stats.featuresFetched << ", duplicates = " << stats.duplicates.size();
// TODO make it a scan step
_dbSession.optimize();
_dbSession.analyze();
if (!_abortScan)
{
src/lms/main.cpp
+4 -1
View File
@@ -238,7 +238,10 @@ int main(int argc, char* argv[])
{
Database::Session session {database};
session.prepareTables();
session.optimize();
// force optimize in case scanner aborted during a large import:
// queries may be too slow to even be able to relaunch a scan sing the web interface
session.analyze();
}
UserInterface::LmsApplicationManager appManager;