Retrieve Disk Usage And Fragmentation Statistics - SAS Scalable Performance Data Server 4.5 Administrator's Manual

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Chapter 17 • SPD Server Index Utility Ixutil
run;
PROC SQL;
quit;
The SAS program above creates a hybrid index for column X of the table named test, on
the machine named spot, in the directory named /spds.

Retrieve Disk Usage and Fragmentation Statistics

Use the
statistics for the index:
> ixutil -stats test -dsn test -libpath /spds
SAS Scalable Performance Data Server 4.5(TS M0)
Build(Feb 26 2009, 11:50:08)
Index File Utility
Copyright (c) 1996-2009 by SAS Institute Inc, Cary NC 27513 USA
Statistics for Index X:
---------------------------------------------------
+--segment_size
+--n_segments_in_tbl
+--n_values_in_index
+--n_vdeleted_values
+--percent_vdeleted
+--n_seglist_values
+--n_seglist_chunks
+--avg_chunks_per_list
+--idx_file_bytes
+--idx_garbage_bytes
+--percent_idx_garbage
Ixutil completed successfully
The statistics include the following:
•
•
•
•
•
•
•
base=my_data.test
data=my_data.test1;
delete from my_data.test
where x=1;
option of ixutil to get the disk usage and segment list fragmentation
-stats
= 8192
= 5
= 2
= 1
= 33.33
= 2
= 3
= 1.00
= 13304
= 4272
= 32.11
The segment size of the index.
The number of segments in the table.
The number of distinct values for the index.
The number of virtually deleted values (values that are no longer recognized by query
indexes.)
The percentage of virtually deleted values.
The number of values that require segment lists (a value that is in only one segment
does not require a segment list).
The number of segment list chunks for all values of the index.