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Forum locked This topic is locked, you cannot edit posts or make further replies.  [ 2 posts ] 
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 Post subject: Extremely slow query
PostPosted: Wed Nov 03, 2010 3:37 am 
Newbie

Joined: Wed Nov 03, 2010 3:14 am
Posts: 1
When I run a query with hibernate I get this log:
Code:
[DEBUG] [13:17:37,207] [cappman] Search started
[DEBUG] [13:17:37,222] [AbstractBatcher] about to open PreparedStatement (open PreparedStatements: 0, globally: 0)
[DEBUG] [13:17:37,222] [SQL] select count(*) as y0_ from "TASKLET" this_ inner join "JOB" job1_ on this_.JOB_ID=job1_.id where this_.TIME_STAMP>=? and this_.TIME_STAMP<=?
[DEBUG] [13:17:37,222] [SQL] select count(*) as y0_ from "TASKLET" this_ inner join "JOB" job1_ on this_.JOB_ID=job1_.id where this_.TIME_STAMP>=? and this_.TIME_STAMP<=?
[DEBUG] [13:17:55,847] [AbstractBatcher] about to open ResultSet (open ResultSets: 0, globally: 0)
[DEBUG] [13:17:55,847] [AbstractBatcher] about to close ResultSet (open ResultSets: 1, globally: 1)
[DEBUG] [13:17:55,847] [AbstractBatcher] about to close PreparedStatement (open PreparedStatements: 1, globally: 1)
[DEBUG] [13:17:55,847] [StatefulPersistenceContext] initializing non-lazy collections
[DEBUG] [13:17:55,863] [cappman] Rowcount in 18 s


How come it takes about 18 seconds to complete when it takes about 2 ms to complete when run in directly against my Oracle database?
Why is there two log statements for the query? Bug?

I probably should provide some more info but I'm not sure what. If you need more, ask for it and I will try to answer.

Hibernate config:
Code:
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
    <session-factory>
        <!-- Connection Pooling -->
        <!-- select count(*) from gv$session where username='CMAN_WEB_DBO'; -->
        <property name="connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property>
        <property name="hibernate.c3p0.min_size">10</property>
        <property name="hibernate.c3p0.max_size">40</property>
        <property name="hibernate.c3p0.timeout">7200</property>
        <property name="hibernate.c3p0.max_statements">0</property>
        <property name="hibernate.c3p0.idle_test_period">300</property>
        <property name="hibernate.c3p0.acquire_increment">2</property>
       
        <property name="hibernate.current_session_context_class">thread</property>
        <property name="hibernate.max_fetch_depth">1</property>
        <property name="hibernate.default_entity_mode">pojo</property>
        <property name="hibernate.jdbc.wrap_result_sets">false</property>
        <property name="hibernate.dbcp.ps.maxIdle">0</property>
        <property name="hibernate.statement_cache.size">0</property>
        <property name="hibernate.jdbc.batch_size">0</property>
        <property name="hibernate.default_batch_fetch_size">8</property>

        <property name="hibernate.show_sql">false</property>
        <property name="hibernate.format_sql">false</property>
        <property name="hibernate.use_outer_join">true</property>
        <property name="dialect">org.hibernate.dialect.OracleDialect</property>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
        <property name="connection.url">jdbc:oracle:thin:@(**)</property>
        <property name="connection.username">**_dbo</property>
        <property name="connection.password">**</property>
       
        <mapping class="cappman.common.dto.UserDTO"/>
        <mapping class="cappman.common.dto.RoleDTO"/>
        <mapping class="cappman.common.dto.TaskDTO"/>
        <mapping class="cappman.common.dto.TaskletDTO"/>
        <mapping class="cappman.common.dto.JobDTO"/>
        <mapping class="cappman.common.dto.JobActionDTO"/>
        <mapping class="cappman.common.dto.JobFileDTO"/>
        <mapping class="cappman.common.dto.FileDTO"/>
        <mapping class="cappman.common.dto.FamilyDTO"/>
        <mapping class="cappman.common.dto.FamilyProgramDTO"/>
        <mapping class="cappman.common.dto.ProgramDTO"/>
        <mapping class="cappman.common.dto.ProgramFileDTO"/>
        <mapping class="cappman.common.dto.OrderErrorDTO"/>
        <mapping class="cappman.common.dto.QuotationErrorDTO"/>
        <mapping class="cappman.common.dto.ErrorHistoryDTO"/>
    </session-factory>
</hibernate-configuration>


Tasklet POJO:
Code:
/*
* TaskletDTO.java
*
* Created on den 1 juni 2007, 16:08
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package cappman.common.dto;

import java.util.ArrayList;
import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.SequenceGenerator;
import javax.persistence.Transient;

/**
* Data Transport Object for a tasklet
* @author mats.l.nilsson@sandvik.com
*/
@Entity
@org.hibernate.annotations.Entity (dynamicUpdate=true)
@SequenceGenerator(name = "hib_seq", sequenceName = "HIBERNATE_SEQUENCE")
@Table(name = "`TASKLET`")
public class TaskletDTO extends AssignmentDTO {

    private String _workerName;

    @Column(name = "WORKER_NAME")
    public String getWorkerName() {
        return _workerName;
    }

    public void setWorkerName(String workerName) {
        this._workerName = workerName;
    }
   
    @Transient
    public String getWorkerHost(){
        String host = _workerName;
        if (_workerName!=null){
            if (_workerName.indexOf("/")>0){
                host = _workerName.substring(0, _workerName.indexOf("/"));
            }
            if (host.indexOf(".")>0){
                host = host.substring(0, host.indexOf("."));
            }
        }
        return host;
    }
    @Transient
    public String getWorkerIP(){
        String ip = _workerName;
        if (_workerName!=null){
            if (_workerName.indexOf("/")>0){
                ip = _workerName.substring(_workerName.indexOf("/"),_workerName.length());
            } else {
                ip = _workerName;
            }
        }
        return ip;
    }
   
    private String _name;

    @Column(name = "NAME")
    public String getName() {
        return _name;
    }

    public void setName(String name) {
        this._name = name;
    }

    private String _description;

    @Column(name = "DESCRIPTION")
    public String getDescription() {
        return _description;
    }

    public void setDescription(String description) {
        this._description = description;
    }

    private List<FileDTO> _files = new ArrayList<FileDTO>();

    @OneToMany(cascade = CascadeType.REFRESH, fetch=FetchType.LAZY)
    @JoinTable(name = "`TASKLET_CAPP_FILE`", joinColumns = {@JoinColumn(name = "TASKLET_ID", referencedColumnName = "ID")}, inverseJoinColumns = {@JoinColumn(name = "CAPP_FILE_ID", referencedColumnName = "ID")})
    public List<FileDTO> getFiles() {
        return _files;
    }

    public void setFiles(List<FileDTO> files) {
        _files = files;
    }
    private TaskDTO _task = new TaskDTO();

    @ManyToOne(cascade = CascadeType.REFRESH, fetch=FetchType.LAZY)
    @JoinColumn(name = "TASK_ID", referencedColumnName = "ID")
    public TaskDTO getTask() {
        return _task;
    }

    public void setTask(TaskDTO task) {
        this._task = task;
    }

    private JobDTO _job = new JobDTO();

    @ManyToOne(cascade = CascadeType.REFRESH, fetch=FetchType.LAZY)
    @JoinColumn(name = "JOB_ID", referencedColumnName = "ID")
    public JobDTO getJob() {
        return _job;
    }

    public void setJob(JobDTO job) {
        this._job = job;
    }
   
    @Transient
    public FileDTO getLogFile() {
        FileDTO logFile = null;
        for (FileDTO file : getFiles()) {
            if (file.getKey().equalsIgnoreCase("logfile")){
                logFile = file;
                break;
            }
        }
        return logFile;
    }

}


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 Post subject: Re: Extremely slow query
PostPosted: Thu Nov 04, 2010 6:49 pm 
Senior
Senior

Joined: Fri Oct 08, 2010 8:44 am
Posts: 130
I guess you Oracle index created for different type of column than you have in your parameter. Try to change parameter types or pass your dates directly as strings (bad style though).


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