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Smart Tables Monitoring

Administrators can monitor the Smart Tables process through 2 files:

Overview of the process (SMT_yyyy-mm-dd.csv files)

located in:

  • the diagnostic ZIP file, under the  /smart_table directory 
  • the warehouse history.dir (defined in galactica.conf), under the /smart-tables directory

The system generates:

  • 1 file per day

File Description

NameDescription

TIME

Date and time of the action

ACTION

see list below

Actions


START

Start of the Smart Table process
STOPEnd of the Smart Table process

CANDIDATES

List the number of candidate tables

CANDIDATE

Define the name of a candidate table

INDEXING_START

Start of the analysis for the selected table

INDEXING_END

End of the analysis for the selected table.
At the end of the analysis process, deletion and/or creation of new index(es) would be performed (when necessary)

UNFINISHED

When The time allowed for the smart table process has ended, and some tables haven't been optimized
TABLE

Table Name valued only for the following Actions:

  • CANDIDATE
  • INDEXING_START
  • INDEXING_END
Comments

When Action is 

Content of Comments

CANDIDATES

Number of candidates

CANDIDATE

Candidate score

UNFINISHEDNumber of tables not optimized on this turn

Results of the analysis process (smart_indexes.csv files)

located in:

  • the diagnostic ZIP file, under the  /smart_table_log directory 
  • the warehouse, under the My_schema.db/My_table/analysis/ directory

The system generates:

  • 1 file per table (No split per day)

When the table is dropped, so is the related smart_indexes file.


NameDescriptionValues
DATEDate of the end of the table analysisTimestamp
TYPEProcess who did the analysisConstant: SMART
STATUSIndex status: existing one, new one, or not used anymoreEXISTING, NEW, OUTDATED
NAMEName of the index (for existing indexes)
MAINIs the index a MAIN index or not?false/true
HITSNumber of hits long
SIZESize of the index (for existing indexes)long
COUNTNumber of rows in the index (for existing indexes)long
BEWAREParameter of the analysis, see Indexima Analyser page for more details
SPECParameter of the analysis, see Indexima Analyser page for more details
PREJOINParameter of the analysis, see Indexima Analyser page for more details
TUNINGParameter of the analysis, see Indexima Analyser page for more details
ACTIONParameter of the analysis, see Indexima Analyser page for more details
MIN_HITParameter of the analysis, see Indexima Analyser page for more details
COEF_MERGEParameter of the analysis, see Indexima Analyser page for more details
NB_DAYSParameter of the analysis, see Indexima Analyser page for more details
FIELDS

Fields of the new index

Ex: Year(Date),sum(Turnover)


JOINS

Join clause (if there is any) of the new index

Ex: JOIN mytble2 on XX.field1=mytble2.field2


MERGE_STRATEGYParameter of the analysis, see Indexima Analyser page for more details
MAX_EXPECTED_INDEXESParameter of the analysis, see Indexima Analyser page for more details
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