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分类: DB2/Informix

2013-11-16 20:43:23

在衡量一个数据库的表的大小的时候,除了使用记录条数,使用表的物理大小来说明一个表,也是一种常用的方法,查询一张数据库表的物理大小的方法有以下三种:
1、使用db2pd -d sample -tcbstats
这种方法,要求数据库表被访问过,才能有结果显示
 db2pd -d sample -tcbstats                                         
 
Database Partition 0 -- Database SAMPLE -- Active -- Up 0 days 00:20:53
 
TCB Table Information:
Address            TbspaceID TableID PartID MasterTbs MasterTab TableName          SchemaNm ObjClass DataSize   LfSize     LobSize    XMLSize  
0x00002B92FB68B9D8 0         1       n/a    0         1         SYSBOOT            SYSIBM   Perm     1          0          0          0        
0x00002B92FBB6B358 2         -1      n/a    2         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBBF0ED8 5         -1      n/a    5         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBB597D8 0         5       n/a    0         5         SYSTABLES          SYSIBM   Perm     29         0          480        0        
0x00002B92FBB2C358 8         -1      n/a    8         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBB2CB58 0         6       n/a    0         6         SYSCOLUMNS         SYSIBM   Perm     160        0          0          0        
0x00002B92FBB2B858 0         35      n/a    0         35        SYSTRIGGERS        SYSIBM   Perm     1          0          32         0        
0x00002B92FBB5B8D8 0         113     n/a    0         113       SYSTASKS           SYSIBM   Perm     1          0          1          0        
0x00002B92FB73B5D8 0         -1      n/a    0         -1        INTERNAL           SYSIBM   Perm     3          0          0          0        
0x00002B92FBBECB58 3         -1      n/a    3         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBB1B558 6         -1      n/a    6         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBBEDB58 4         -1      n/a    4         -1        INTERNAL           SYSIBM   Perm     1          0          0          0        
0x00002B92FBB5B0D8 5         4       n/a    5         4         POLICY             SYSTOOLS Perm     1          0          32         0        
 
TCB Table Stats:
Address            TableName          SchemaNm Scans      UDI        RTSUDI               PgReorgs   NoChgUpdts Reads      FscrUpdates Inserts    Updates    Deletes    OvFlReads  OvFlCrtes  RowsComp   RowsUncomp CCLogReads StoreBytes BytesSaved
0x00002B92FB68B9D8 SYSBOOT            SYSIBM   1          0          0                    0          0          1          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB6B358 INTERNAL           SYSIBM   0          0          0                    0          0          45         0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBBF0ED8 INTERNAL           SYSIBM   0          0          0                    0          0          11         0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB597D8 SYSTABLES          SYSIBM   4          4          4                    0          0          2011       0           0          0          0          5          0          0          0          0          -          -        
0x00002B92FBB2C358 INTERNAL           SYSIBM   0          0          0                    0          0          3          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB2CB58 SYSCOLUMNS         SYSIBM   0          96         96                   0          0          5          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB2B858 SYSTRIGGERS        SYSIBM   0          0          0                    0          0          4          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB5B8D8 SYSTASKS           SYSIBM   0          0          0                    0          0          0          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FB73B5D8 INTERNAL           SYSIBM   0          0          0                    0          0          399        0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBBECB58 INTERNAL           SYSIBM   0          0          0                    0          0          4          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB1B558 INTERNAL           SYSIBM   0          0          0                    0          0          3          0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBBEDB58 INTERNAL           SYSIBM   0          0          0                    0          0          21         0           0          0          0          0          0          0          0          0          -          -        
0x00002B92FBB5B0D8 POLICY             SYSTOOLS 0          0          0                    0          0          1          0           0          0          0          0          0          0          0          0          -          - 
 
在这里,我们发现不了表LEO_BIG_DATA等建立的表,原因在于这些表并没有被访问过;
 
2、使用sysibmadm.admintabinfo视图进行查看:
$ db2 "select TABNAME,DATA_OBJECT_P_SIZE from sysibmadm.admintabinfo"
 
TABNAME                                                                                                                          DATA_OBJECT_P_SIZE 
-------------------------------------------------------------------------------------------------------------------------------- --------------------
SYSTABLES                                                                                                                                         288
SYSCOLUMNS                                                                                                                                       1312
SYSINDEXES                                                                                                                                        192
SYSVIEWS                                                                                                                                           96
SYSVIEWDEP                                                                                                                                         96
SYSPLAN                                                                                                                                           224
SYSPLANDEP                                                                                                                                        224
SYSSECTION                                                                                                                                        224
SYSSTMT                                                                                                                                           256
SYSDBAUTH                                                                                                                                          64
SYSPLANAUTH                                                                                                                                        64
SYSTABAUTH                                                                                                                                         96
SYSINDEXAUTH                                                                                                                                       64
SYSRELS                                                                                                                                            64
SYSROUTINES                                                                                                                                       512
SYSROUTINEPARMS                                                                                                                                  1568
SYSTABCONST                                                                                                                                        64
SYSKEYCOLUSE                                                                                                                                       64
SYSCHECKS                                                                                                                                          64
SYSCOLCHECKS                                                                                                                                       64
SYSDATATYPES                                                                                                                                       64
SYSCONSTDEP                                                                                                                                        64
SYSCOLDIST                                                                                                                                       2176
SYSEVENTMONITORS                                                                                                                                   64
SYSEVENTS                                                                                                                                          64
SYSTABLESPACES                                                                                                                                     64
SYSDEPENDENCIES                                                                                                                                   224
SYSTRIGGERS                                                                                                                                        64
SYSCOLAUTH                                                                                                                                         64
SYSSCHEMAAUTH                                                                                                                                      64
SYSSCHEMATA                                                                                                                                        64
SYSUSERAUTH                                                                                                                                        96
SYSNODEGROUPDEF                                                                                                                                    64
SYSNODEGROUPS                                                                                                                                      64
SYSPARTITIONMAPS                                                                                                                                   64
SYSBUFFERPOOLS                                                                                                                                     64
SYSBUFFERPOOLNODES                                                                                                                                 64
SYSCOLPROPERTIES                                                                                                                                   64
SYSATTRIBUTES                                                                                                                                      64
SYSHIERARCHIES                                                                                                                                     64
SYSTBSPACEAUTH                                                                                                                                     64
SYSCOLOPTIONS                                                                                                                                      64
SYSFUNCMAPOPTIONS                                                                                                                                  64
SYSFUNCMAPPARMOPTIONS                                                                                                                              64
SYSFUNCMAPPINGS                                                                                                                                    64
SYSINDEXEXPLOITRULES                                                                                                                               64
SYSINDEXEXTENSIONPARMS                                                                                                                             64
SYSINDEXEXTENSIONS                                                                                                                                 64
SYSINDEXEXTENSIONMETHODS                                                                                                                           64
SYSINDEXOPTIONS                                                                                                                                    64
SYSPASSTHRUAUTH                                                                                                                                    64
SYSPREDICATESPECS                                                                                                                                  64
SYSTYPEMAPPINGS                                                                                                                                    64
SYSSERVEROPTIONS                                                                                                                                   64
SYSSERVERS                                                                                                                                         64
SYSTABOPTIONS                                                                                                                                      64
SYSTRANSFORMS                                                                                                                                      64
SYSUSEROPTIONS                                                                                                                                     64
SYSWRAPOPTIONS                                                                                                                                     64
SYSWRAPPERS                                                                                                                                        64
SYSJARCONTENTS                                                                                                                                     64
SYSJAROBJECTS                                                                                                                                      64
SYSNAMEMAPPINGS                                                                                                                                    64
SYSSEQUENCES                                                                                                                                       64
SYSINDEXCOLUSE                                                                                                                                     96
SYSVERSIONS                                                                                                                                        64
SYSCOLUSE                                                                                                                                          64
SYSROUTINEAUTH                                                                                                                                    192
SYSLIBRARIES                                                                                                                                       64
SYSLIBRARYBINDFILES                                                                                                                                64
SYSLIBRARYVERSIONS                                                                                                                                 64
SYSCOLGROUPS                                                                                                                                       64
SYSCOLGROUPSCOLS                                                                                                                                   64
SYSCOLGROUPDIST                                                                                                                                    64
SYSCOLGROUPDISTCOUNTS                                                                                                                              64
SYSLIBRARYAUTH                                                                                                                                     64
SYSEVENTTABLES                                                                                                                                     64
SYSROUTINEPROPERTIES                                                                                                                               64
SYSCOMMENTS                                                                                                                                        64
SYSSEQUENCEAUTH                                                                                                                                    64
SYSCODEPROPERTIES                                                                                                                                  64
SYSXMLSTRINGS                                                                                                                                      64
SYSXMLPATHS                                                                                                                                        64
SYSXSROBJECTS                                                                                                                                      64
SYSXSROBJECTCOMPONENTS                                                                                                                             64
SYSXSROBJECTAUTH                                                                                                                                   64
SYSXSROBJECTHIERARCHIES                                                                                                                            64
SYSINDEXXMLPATTERNS                                                                                                                                64
SYSXDBMAPGRAPHS                                                                                                                                    64
SYSXDBMAPSHREDTREES                                                                                                                                64
SYSDATAPARTITIONS                                                                                                                                  64
SYSDATAPARTITIONEXPRESSION                                                                                                                         64
SYSJOBS                                                                                                                                            64
SYSTASKS                                                                                                                                           64
SYSTUNINGINFO                                                                                                                                      64
SYSSECURITYLABELCOMPONENTS                                                                                                                         64
SYSSECURITYLABELCOMPONENTELEMENTS                                                                                                                  64
SYSSECURITYPOLICIES                                                                                                                                64
SYSSECURITYPOLICYCOMPONENTRULES                                                                                                                    64
SYSSECURITYLABELS                                                                                                                                  64
SYSSECURITYLABELACCESS                                                                                                                             64
SYSSECURITYPOLICYEXEMPTIONS                                                                                                                        64
SYSSURROGATEAUTHIDS                                                                                                                                64
SYSROUTINEOPTIONS                                                                                                                                  64
SYSROUTINEPARMOPTIONS                                                                                                                              64
SYSROLES                                                                                                                                           64
SYSROLEAUTH                                                                                                                                        64
SYSCONTEXTS                                                                                                                                        64
SYSCONTEXTATTRIBUTES                                                                                                                               64
SYSCOLLATIONS                                                                                                                                      64
SYSVARIABLES                                                                                                                                       64
SYSVARIABLEAUTH                                                                                                                                    64
SYSWORKLOADS                                                                                                                                       64
SYSWORKLOADCONNATTR                                                                                                                                64
SYSWORKLOADAUTH                                                                                                                                    64
SYSSERVICECLASSES                                                                                                                                  64
SYSWORKCLASSSETS                                                                                                                                   64
SYSWORKCLASSES                                                                                                                                     64
SYSWORKACTIONSETS                                                                                                                                  64
SYSWORKACTIONS                                                                                                                                     64
SYSTHRESHOLDS                                                                                                                                      64
SYSHISTOGRAMTEMPLATES                                                                                                                              64
SYSHISTOGRAMTEMPLATEBINS                                                                                                                           64
SYSHISTOGRAMTEMPLATEUSE                                                                                                                            64
SYSAUDITUSE                                                                                                                                        64
SYSAUDITPOLICIES                                                                                                                                   64
SYSMODULEAUTH                                                                                                                                      64
SYSMODULES                                                                                                                                         64
SYSINVALIDOBJECTS                                                                                                                                  64
SYSINDEXPARTITIONS                                                                                                                                 64
CL_SCHED                                                                                                                                          512
DEPARTMENT                                                                                                                                        512
EMPLOYEE                                                                                                                                          512
EMP_PHOTO                                                                                                                                         512
EMP_RESUME                                                                                                                                        512
PROJECT                                                                                                                                           512
PROJACT                                                                                                                                           512
EMPPROJACT                                                                                                                                        512
ACT                                                                                                                                               512
IN_TRAY                                                                                                                                           512
ORG                                                                                                                                               512
STAFF                                                                                                                                             512
SALES                                                                                                                                             512
STAFFG                                                                                                                                            512
ADEFUSR                                                                                                                                           512
EMPMDC                                                                                                                                           3584
PRODUCT                                                                                                                                           512
INVENTORY                                                                                                                                         512
CUSTOMER                                                                                                                                          512
PURCHASEORDER                                                                                                                                     512
CATALOG                                                                                                                                           512
SUPPLIERS                                                                                                                                         512
PRODUCTSUPPLIER                                                                                                                                   512
POLICY                                                                                                                                             64
HMON_ATM_INFO                                                                                                                                      96
HMON_COLLECTION                                                                                                                                    64
LEO_BIG_DATA                                                                                                                                 38389760
DMS_TS_AUTO_TEST                                                                                                                                  256
 
  158 record(s) selected.
可以发现,表的物理大小(单位KB)都被显示出来了,无论其是否被访问过;
 
3、使用表函数sysproc.admin_get_tab_info('模式','表名')进行表的大小的查看
$ db2 "select * from table(sysproc.admin_get_tab_info('DB2INST1','LEO_BIG_DATA'))"
 
TABSCHEMA                                                                                                                        TABNAME                                                                                                                          TABTYPE DBPARTITIONNUM DATA_PARTITION_ID AVAILABLE DATA_OBJECT_L_SIZE   DATA_OBJECT_P_SIZE   INDEX_OBJECT_L_SIZE  INDEX_OBJECT_P_SIZE  LONG_OBJECT_L_SIZE   LONG_OBJECT_P_SIZE   LOB_OBJECT_L_SIZE    LOB_OBJECT_P_SIZE    XML_OBJECT_L_SIZE    XML_OBJECT_P_SIZE    INDEX_TYPE REORG_PENDING INPLACE_REORG_STATUS LOAD_STATUS  READ_ACCESS_ONLY NO_LOAD_RESTART NUM_REORG_REC_ALTERS INDEXES_REQUIRE_REBUILD LARGE_RIDS LARGE_SLOTS DICTIONARY_SIZE    
-------------------------------------------------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------------------------------------------------- ------- -------------- ----------------- --------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- -------------------- ---------- ------------- -------------------- ------------ ---------------- --------------- -------------------- ----------------------- ---------- ----------- --------------------
DB2INST1                                                                                                                         LEO_BIG_DATA                                                                                                                     T                    0                 0 Y                     38389760             38389760                    0                    0                    0                    0                    0                    0                    0                    0          - N             -                    -            N                N                                  0 -                       Y          Y                              0
 
  1 record(s) selected.
 
$
这里需要注意的是,模式名,需要使用大写。
 
 
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