Problem with method "write" in POI Library.

Question

Best regards, I have the following problem: I have a application in Oracle BPM 10g, that generates a file in Excel. First it upload a template, then query the data base, and storage this data in "POI Object" of type "XSSFWorkbook"; all of the this, at memory.
The problem is when I try to write this object  "XSSFWorkbook", in the file(generate a Physical File), the file size is about 35 MB, usgin the method wb.write(out) of the "POI Library", my server spend about 15  minutes, generating blocks.
I' like that some help me to solve this problem, maybe making any setting in my server.
My Servers are:
Application Server: Oracle WebLogic 10.3.1
and File Server: Oracle Linux. Memoy: 32GB
I show you the code in java:
            rsQuery = generarTablas(sStoredProcedure,xmlTableroControl);
            InputStream inp = JExcel.cargarPlantillaLectura(sRutaOrigen + sNombreOrigen + ".bck");
           XSSFWorkbook  wb = new XSSFWorkbook(inp);  //DESCOMENTAR
          wb.setForceFormulaRecalculation(true);
            int vnHoja = 0;
            String vsTabla = "";
            while(rsQuery.next()){
                vnHoja  = rsQuery.getInt(1);
                vsTabla = rsQuery.getString(2);
                outResultado = new BufferedWriter (new FileWriter("/tmp/"+String.valueOf(nOrden)+vsTabla+".txt"));
                outResultado.write("vsTabla: "+vsTabla+" Hoja : "+String.valueOf(vnHoja)+  "\n"+String.valueOf(Util.getTodayTime()));
                outResultado.close();
              nOrden ++;
                this.rsConsulta = consultar(vsTabla);
              if(_getRowCount(this.rsConsulta)>0)
                    generarHoja(wb, 6, vnHoja);
                    this.rsConsulta = null;//agregado 12/06/2013
             File tempFileXLS = File.createTempFile(sNombreDestino + this.sFechaFin + "_", ".xlsx");
            ruta = sRutaDestino + tempFileXLS.getName();
            OutputStream out = new FileOutputStream(ruta);
            inp.close();
            wb.write(out);//---------------------> PROBLEM

Answer 1

Best regards, I have the following problem: I have a application in Oracle BPM 10g, that generates a file in Excel. First it upload a template, then query the data base, and storage this data in "POI Object" of type "XSSFWorkbook"; all of the this, at memory.
The problem is when I try to write this object  "XSSFWorkbook", in the file(generate a Physical File), the file size is about 35 MB, usgin the method wb.write(out) of the "POI Library", my server spend about 15  minutes, generating blocks.
I' like that some help me to solve this problem, maybe making any setting in my server.
My Servers are:
Application Server: Oracle WebLogic 10.3.1
and File Server: Oracle Linux. Memoy: 32GB
I show you the code in java:
            rsQuery = generarTablas(sStoredProcedure,xmlTableroControl);
            InputStream inp = JExcel.cargarPlantillaLectura(sRutaOrigen + sNombreOrigen + ".bck");
           XSSFWorkbook  wb = new XSSFWorkbook(inp);  //DESCOMENTAR
          wb.setForceFormulaRecalculation(true);
            int vnHoja = 0;
            String vsTabla = "";
            while(rsQuery.next()){
                vnHoja  = rsQuery.getInt(1);
                vsTabla = rsQuery.getString(2);
                outResultado = new BufferedWriter (new FileWriter("/tmp/"+String.valueOf(nOrden)+vsTabla+".txt"));
                outResultado.write("vsTabla: "+vsTabla+" Hoja : "+String.valueOf(vnHoja)+  "\n"+String.valueOf(Util.getTodayTime()));
                outResultado.close();
              nOrden ++;
                this.rsConsulta = consultar(vsTabla);
              if(_getRowCount(this.rsConsulta)>0)
                    generarHoja(wb, 6, vnHoja);
                    this.rsConsulta = null;//agregado 12/06/2013
             File tempFileXLS = File.createTempFile(sNombreDestino + this.sFechaFin + "_", ".xlsx");
            ruta = sRutaDestino + tempFileXLS.getName();
            OutputStream out = new FileOutputStream(ruta);
            inp.close();
            wb.write(out);//---------------------> PROBLEM