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Optimizes cache_db_ for faster

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git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@2817 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
scorpio810 2014-02-07 07:04:27 +00:00
parent 5814b55083
commit 8bf916ca03
1 changed files with 5 additions and 3 deletions
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8
sources/elementscollectioncache.cpp
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@ -39,10 +39,12 @@ ElementsCollectionCache::ElementsCollectionCache(const QString &database_path, Q
if (!cache_db_.open()) {
qDebug() << "Unable to open the SQLite database " << database_path << " as " << connection_name << ": " << cache_db_.lastError();
} else {
cache_db_.exec("PRAGMA temp_store=MEMORY");
cache_db_.exec("PRAGMA temp_store = MEMORY");
cache_db_.exec("PRAGMA journal_mode = MEMORY");
cache_db_.exec("PRAGMA synchronous=OFF");
cache_db_.exec("PRAGMA cache_size=10000");
cache_db_.exec("PRAGMA page_size = 4096");
cache_db_.exec("PRAGMA cache_size = 16384");
cache_db_.exec("PRAGMA locking_mode = EXCLUSIVE");
cache_db_.exec("PRAGMA synchronous = OFF");
/// @todo the tables could already exist, handle that case.
cache_db_.exec("CREATE TABLE names (path VARCHAR(512) NOT NULL, locale VARCHAR(2) NOT NULL, mtime DATETIME NOT NULL, name VARCHAR(128), PRIMARY KEY(path, locale));");
cache_db_.exec("CREATE TABLE pixmaps (path VARCHAR(512) NOT NULL UNIQUE, mtime DATETIME NOT NULL, pixmap BLOB, PRIMARY KEY(path), FOREIGN KEY(path) REFERENCES names (path) ON DELETE CASCADE);");