Cost Factors Of Detail_Cost Column - HP Neoview SQL Reference Manual

Column Name
DETAIL_COST
DESCRIPTION
The DETAIL_COST column contains these cost factors:
Table 2-6 Cost Factors of DETAIL_COST column
CPU_TIME
IO_TIME
MSG_TIME
IDLETIME
PROBES
The following example has been edited to allow it to be displayed here (lines folded, trailing
blanks removed, and so on).
This example uses OPTIONS 'm':
>>explain options 'm' select * from region;
MODULE_NAME
PLAN_ID
RIGHT_CHILD_SEQ_NUM TNAME
OPERATOR_COST TOTAL_COST
DESCRIPTION
------------------------------------------------------------
---------------- --------------------
------------------ ------------------------------------------------------------
-------- ---------------
----------------------------------------------------------------------------------------------------------
--------------- -------------------
?
212141478299499838
NEO.USR.REGION
003 9.2547051E-003 CPU_TIME:= 0.000374705 IO_TIME:= 0.00888 MSG_TIME:= 0 IDLETIME:= 0
max_card_est: 100 fragment_id: 2 parent_frag: 0 fragment_type: dp2 scan_type: full scan of table
NEO.USR.REGION scan_direction: forward
columns_retrieved: 3 fast_scan: used fast_replydata_move: used key_columns: R_KEY begin_key: (R_KEY = <min>)
end_key: (R_KEY = <max>)
?
212141478299499838
004 9.9422819E-003 CPU_TIME:= 0.00106228 IO_TIME:= 0.00888 MSG_TIME:= 0 IDLETIME:= 0
max_card_est: 100 fragment_id: 2 parent_frag: 0 fragment_type: dp2 buffer_size: 31000
record_length: 306 space_usage: 5:32:100:144 bottom_node_map: (\THE0105:13)
?
212141478299499838
005 9.9795795E-003 CPU_TIME:= 0.00109958 IO_TIME:= 0.00888 MSG_TIME:= 0 IDLETIME:= 0.098
max_card_est: 100 fragment_id: 0 parent_frag: (none) fragment_type: master statement:
from region; xn_access_mode: read_only xn_autoabort_interval: 0 auto_query_retry: enabled plan_version:
2400 SESSION_USERNAME: MXID01010130744212141209524355662000000044209superuser00 LDAP_USERNAME: superuser
NVCI_PROCESS: ON SHOWCONTROL_UNEXTERNALIZED_ATTRS: OFF SCHEMA: USR GENERATE_EXPLAIN: ON select_list:
NEO.USR.REGION.R_KEY, NEO.USR.REGION.R_NAME, NEO.USR.REGION.R_COMMENT
*** SQL operation complete.
Data Type
VARCHAR (200)
VARCHAR (3000)
An estimate of the number of seconds of processor time it might take to execute the
instructions for this operator. A value of 1.0 is 1 second.
An estimate of the number of seconds of I/O time (seeks plus data transfer) to perform
the I/O for this operator.
An estimate of the number of seconds it takes for the messaging for this operator. The
estimate includes the time for the number of local and remote messages and the
amount of data sent.
An estimate of the number of seconds to wait for an event to happen. The estimate
includes the amount of time to open a table or start an ESP process.
The number of times the operator will be executed. Usually, this value is 1, but it can
be greater when you have, for example, an inner scan of a nested-loop join.
SEQ_NUM OPERATOR
DETAIL_COST
-----------
-------------------------------------------------------------------------------
1 FILE_SCAN
lock_state: cursor consistency_level: read_committed
2 PARTITION_ACCESS
3 ROOT
Description
Cost vector of five items, which are described in detail
in the next table.
Additional information about the operator. For a
detailed look at all operators, see the Neoview Query
Guide.
STATEMENT_NAME
--------------------------------------------
------------------------------
__EXPL_STMT_NAME__
__EXPL_STMT_NAME__
__EXPL_STMT_NAME__
LEFT_CHILD_SEQ_NUM
CARDINALITY
------------------
--------------- -------
?
1.0000000E+002 9.2547051E-
PROBES:= 1
1
1.0000000E+002 6.8757636E-
PROBES:= 1
2
1.0000000E+002 3.7297573E-
PROBES:= 1
select *
EXPLAIN Statement
-
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