如何提高在 Grails 中保存批量数据的性能？

Question

我正在数据库中保存大量数据，但是保存 3000 行需要很多时间，所以我想在每次保存时清除会话 data.I 我无法检索会话对象。

错误：

Stacktrace follows:
Message: Cannot invoke method getCurrentSession() on null object

代码：

def importUpload() {
        def sessionFactory;
        def session = sessionFactory.getCurrentSession()
        User currentUser = springSecurityService.getCurrentUser();
        def file = request.getFile('file')
        InputStream is =file.getInputStream()
        XSSFWorkbook workbook = new XSSFWorkbook(is);
        int sheet_Num = workbook.getNumberOfSheets();
        for (int sheetNo = 0; sheetNo < sheet_Num; sheetNo++) {
            Sheet sheet = workbook.getSheetAt(sheetNo);

                for (int row = 1; row < sheet.getLastRowNum(); row++) {
                PrimaryOwner = sheet.getRow(row).getCell(1);
                SecondaryOwner = sheet.getRow(row).getCell(2);
                BusinessUnit = sheet.getRow(row).getCell(3);
                ProfileTitle = sheet.getRow(row).getCell(5);

                def job = Job.findByName(ProfileTitle);
                if(!job){
                    Job jobObj=new Job();

                    jobObj.account = currentUser.account;
                    jobObj.contactName = PrimaryOwner;
                    jobObj.secondaryContactName = SecondaryOwner
                    jobObj.buisnessUnit = BusinessUnit
                    jobObj.name = ProfileTitle
                    job = jobObj.save(failOnError:true,flush:true);
                    session.flush()
                    session.clear()
                }
}

Answer 1

看看这个博客：http://naleid.com/blog/2009/10/01/batch-import-performance-with-grails-and-mysql

我按照它的指导刷新并清除了会话，并取得了良好的效果。我将其与一些批量保存相结合。

像这样： <pre> SessionFactory sessionFactory //inject sessionFactory</p> <pre><code>void CreateBills(List<Statement> statements){ statements.colate(100).each{List<Statement> batchedStatements -> batchedStatements.each{Statement statement -> new Bill(statement).save() } cleanupGorm() } } void cleanupGorm(){ def session = sessionFactory.currentSession session.flush() session.clear() DomainClassGrailsPlugin.PROPERTY_INSTANCE_MAP.get().clear() }

如何提高在 Grails 中保存批量数据的性能？

How to improve performance of saving bulk data in grails?

grails

groovy

grails-orm