数据库性能分析与诊断的ArcToolbox工具-Tell The Bees

对熟悉数据库的朋友来说,当我们出现了跟数据库相关问题的情况下,比如我们出现了性能问题或者错误,我们可以直接查找数据库的Trace文件来分析,因为这个文件会非常详细的把用户的GUI操作转换为直接SQL语句和后台SQL语句,是否走相关索引,运行涉及了那些表,出现什么问题等都会有很详细的说明。

那么这个文件的获取如果没有数据库经验的用户还是挺困难的,以Oracle数据库为例,它需要写入很长的SQL语句,那么Esri提供了一个Tell The Bees的工具来很方面的解决这个问题。

以Oracle为例,使用SQL语句获得Trace文件请参考:

在Oracle中跟踪后台所执行的SQL语句:
http://blog.csdn.net/liufeng1980423/article/details/6072515 
Oracle跟踪文件的格式说明
Tell The Bees下载地址
系统需求:

ArcGIS Desktop 10.0 or better.

.Net Runtime 3.5 or better.


下载完该软件,安装即可,然后在ArcMap的Arctoolbox添加该工具
数据库性能分析与诊断的ArcToolbox工具-Tell The Bees_第1张图片
从截图中我们可以看到有Start和Stop,而且支持Oracle、SQL Server、PostgreSQL三种数据库
以Oracle为例,在执行该工具之前,需要说明一下的,该工具是针对Session级别的,如果需要改动,请重新连接数据库加载数据。
而且对连接用户的权限需求为:“Alter session”, “Create Table”, “Select any dictionary”.

执行过程一般为首先Start Oracle Trace,然后在ArcMap做相关操作,最后Stop Oracle Trace。

执行完Stop Oracle Trace之后我们可以看到相关的信息
Executing: stop_oratrace TEST.DLTB
Start Time: Tue Nov 08 09:19:08 2011
Trace file location is recorded in a table called 'draw_tyme_trace_file_name' in this users schema
Succeeded at Tue Nov 08 09:19:11 2011 (Elapsed Time: 3.00 seconds)
我们可以当前连接用户查看draw_tyme_trace_file_name的表,相关的Trace文件路径就存储在那里。
----------------------------------------------
获得完trace文件,大家应该对这些密密麻麻的信息看的一头雾水,也可以使用TKPROF来解释
C:\Users\gis>tkprof
Usage: tkprof tracefile outputfile [explain= ] [table= ]
              [print= ] [insert= ] [sys= ] [sort= ]
  table=schema.tablename   Use 'schema.tablename' with 'explain=' option.
  explain=user/password    Connect to ORACLE and issue EXPLAIN PLAN.
  print=integer    List only the first 'integer' SQL statements.
  aggregate=yes|no
  insert=filename  List SQL statements and data inside INSERT statements.
  sys=no           TKPROF does not list SQL statements run as user SYS.
  record=filename  Record non-recursive statements found in the trace file.
  waits=yes|no     Record summary for any wait events found in the trace file.
  sort=option      Set of zero or more of the following sort options:
    prscnt  number of times parse was called
    prscpu  cpu time parsing
    prsela  elapsed time parsing
    prsdsk  number of disk reads during parse
    prsqry  number of buffers for consistent read during parse
    prscu   number of buffers for current read during parse
    prsmis  number of misses in library cache during parse
    execnt  number of execute was called
    execpu  cpu time spent executing
    exeela  elapsed time executing
    exedsk  number of disk reads during execute
    exeqry  number of buffers for consistent read during execute
    execu   number of buffers for current read during execute
    exerow  number of rows processed during execute
    exemis  number of library cache misses during execute
    fchcnt  number of times fetch was called
    fchcpu  cpu time spent fetching
    fchela  elapsed time fetching
    fchdsk  number of disk reads during fetch
    fchqry  number of buffers for consistent read during fetch
    fchcu   number of buffers for current read during fetch
    fchrow  number of rows fetched
    userid  userid of user that parsed the cursor


C:\Users\gis>tkprof c:\1.trc
output = c:\222.trc

TKPROF: Release 11.2.0.1.0 - Development on 星期二 11月 8 09:26:33 2011

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
我没有添加其他Option选项,大家可以自己测试,我们打开解析转换好的新文件
TKPROF: Release 11.2.0.1.0 - Development on 星期一 11月 7 11:37:34 2011

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.

Trace file: c:\1.trc
Sort options: default

********************************************************************************
count    = number of times OCI procedure was executed
cpu      = cpu time in seconds executing 
elapsed  = elapsed time in seconds executing
disk     = number of physical reads of buffers from disk
query    = number of buffers gotten for consistent read
current  = number of buffers gotten in current mode (usually for update)
rows     = number of rows processed by the fetch or execute call
********************************************************************************

SQL ID: 3nkd3g3ju5ph1
Plan Hash: 2853959010
select obj#,type#,ctime,mtime,stime, status, dataobj#, flags, oid$, spare1, 
  spare2 
from
 obj$ where owner#=:1 and name=:2 and namespace=:3 and remoteowner is null 
  and linkname is null and subname is null


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        7      0.00       0.00          0          0          0           0
Execute    129      0.03       0.04          0          0          0           0
Fetch      129      0.00       0.17         37        510          0         123
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total      265      0.03       0.22         37        510          0         123

Misses in library cache during parse: 1
Misses in library cache during execute: 1
Optimizer mode: CHOOSE
Parsing user id: SYS   (recursive depth: 1)

Rows     Row Source Operation
-------  ---------------------------------------------------
      0  TABLE ACCESS BY INDEX ROWID OBJ$ (cr=3 pr=1 pw=0 time=0 us cost=4 size=83 card=1)
      0   INDEX RANGE SCAN I_OBJ2 (cr=3 pr=1 pw=0 time=0 us cost=3 size=0 card=1)(object id 37)


Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  db file sequential read                        37        0.05          0.15
********************************************************************************

SQL ID: 82b9x84vs49nr
Plan Hash: 1388734953
Select 'SQL TRACE STARTED 
FROM
 GEOPROCESSING' as NOTE from DUAL


call     count       cpu    elapsed       disk      query    current        rows
------- ------  -------- ---------- ---------- ---------- ----------  ----------
Parse        3      0.00       0.07          1          3          0           0
Execute      3      0.00       0.00          0          0          0           0
Fetch        3      0.00       0.00          0          0          0           3
------- ------  -------- ---------- ---------- ---------- ----------  ----------
total        9      0.00       0.07          1          3          0           3

Misses in library cache during parse: 3
Optimizer mode: ALL_ROWS
Parsing user id: 93  

Rows     Row Source Operation
-------  ---------------------------------------------------
      1  FAST DUAL  (cr=0 pr=0 pw=0 time=0 us cost=2 size=0 card=1)


Elapsed times include waiting on following events:
  Event waited on                             Times   Max. Wait  Total Waited
  ----------------------------------------   Waited  ----------  ------------
  SQL*Net message to client                       6        0.00          0.00
  SQL*Net message from client                     6        8.69         14.20
********************************************************************************

我只是截取了部分信息,我们可以看到,我们在执行每一步SQL的效率相应都可以看到,那么我们就根据这些信息进行相关的优化和管理。

****************************************************************************************************
那么对SQL Server其实也是一样的,不过SQL Server在获得Trace信息比较简单,用户也可以利用SQL Server Profiler来监听信息  参考:http://blog.csdn.net/linghe301/article/details/6669138
使用SQL Server时注意:
Executing: start_sqltrace sde.SDE.dltb c:\11.trc
Start Time: Mon Nov 07 11:56:45 2011
Underlying DBMS error [Microsoft SQL Server Native Client 10.0: 您没有运行 

'SP_TRACE_CREATE' 的权限。]
Failed to execute (start_sqltrace).
Failed at Mon Nov 07 11:56:45 2011 (Elapsed Time: 0.00 seconds)



其他工具说明
Draw Tyme
This tool generates a .csv file that contains layer draw time information.  It draws extents that are determined by the features of a “driving” featureclass.  This tool can be useful for finding layers that contribute to slow drawing at different scales.  The .csv  can be conveniently analyzed in Excel or similar spreadsheet programs.
B-boxer
B-boxer can be used to generate a “driving” featureclass for “Draw Tyme”.  It requires an input point featureclass.  That featureclass can be created with the “Create Random Points” tool.  Together these tools allow you to generate random extents within an area of interest at scales of interest.  B-boxer also outputs the extent information to a .csv file.  The .csv file can be adapted for use in tools like Jmeter and StresStimulus (Internet application load testing tools).
Export Group Layers
“Draw Tyme” will only generate layer draw time information for layers at the root level of the table of contents.  Therefore, group layers are not very compatible with “Draw Tyme”.  You can “flatten-out” the group layers from a given document to a directory of .lyr files with this tool.  Essentially, it takes the visibility and scale dependency from the top-most (root) containing group layers and applies them to the bottom-most (leaf) layers, exporting them to .lyr files.  You can then make a new mxd from these .lyrs.  This mxd will have the same drawing behaviors as the source and you will get the draw timing output information that you desire from “Draw Tyme”.  Note that not all group layers can be decomposed into individual .lyr parts.  Basemap layers and ArcGIS Server service layers are examples of types that will not be “exploded” in this way because ArcGIS does not allow it.






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