MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/25/02 through 05/31/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 27 95 122
Davis 70 1 71
Irvine 39 0 39
Los Angeles 1 32 33
Riverside 4 5 9
San Diego 34 15 49
San Francisco 4 0 4
Santa Barbara 7 10 17
Santa Cruz 1 23 24
LBL 0 5 5
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 1 9 10
Stanford 1
Other-Network UC n/a 29 29
_______ ______ _____
188 224 413
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 6 38 353
2-4 a.m. 6 46 483
4-6 a.m. 4 4 16
6-8 a.m. 15 23 106
8-10 a.m. 30 76 1,485
10-12 a.m. 75 150 2,343
12-2 p.m. 82 204 2,895
2-4 p.m. 80 215 3,057
4-6 p.m. 49 120 1,589
6-8 p.m. 24 65 609
8-10 p.m. 27 87 989
10-12 p.m. 15 67 354
__________ __________ __________ _________________
Total: 413 1,095 14,279
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 46 219 265
Davis 200 3 203
Irvine 106 0 106
Los Angeles 35 129 164
Riverside 7 11 18
San Diego 119 23 142
San Francisco 7 0 7
Santa Barbara 9 40 49
Santa Cruz 4 46 50
LBL 0 9 9
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 2 16 18
Stanford 5
Other-Network UC n/a 59 59
_______ ______ _____
535 555 1,095
Number of FIND commands by database
MAGS database 1,009
NEWS database 56
COMP database 30
Total number of FIND commands 1,095
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,729 2,546 4,275
Davis 1,952 70 2,022
Irvine 1,343 0 1,343
Los Angeles 112 1,232 1,344
Riverside 23 105 128
San Diego 1,404 287 1,691
San Francisco 192 0 192
Santa Barbara 281 544 825
Santa Cruz 0 848 848
LBL 0 134 134
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 31 419 450
Stanford 2
Other-Network UC n/a 1,015 1,015
_______ ______ _____
7,067 7,200 14,269
Number of Records Displayed by database:
MAGS database 13,714
NEWS database 391
COMP database 174
Total number of Records Displayed 14,269
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.2%
Percent of NEWS sessions 8.0%
Percent of COMP sessions 4.8%
Percent of searches done in the MAGS database 92.1%
Percent of searches done in the NEWS database 5.1%
Percent of searches done in the COMP database 2.7%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.3
Standard deviation in seconds 0.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:23
Average session length (minutes:seconds) 16:14
Longest session recorded (minutes:seconds) 361:25
Average number of searches completed per session 2.8
Retrievals per search - median 7.0
Retrievals per search - average 751.6
Retrievals per search - standard deviation 6226.4
Percent of searches completed with 0 results 27.2%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 961 25.9%
DISPLAY (excluding automatic displays) 1,602 43.2%
HELP 77 2.1%
EXPLAIN 64 1.7%
SET/RESET 129 3.5%
SHOW 7 0.2%
ADD ON (AND, OR, AND NOT) 48 1.3%
LOGON or LOGOFF 494 13.3%
COMMENT 0 0.0%
SAVE 72 1.9%
USE 3 0.1%
OTHER 248 6.7%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 278 27.5% 61 21.9% 12 97.4 448.5
TITLE WORD 220 21.8% 82 37.3% 13 562.2 3703.4
EXACT TITLE 17 1.7% 8 47.1% 2 3.8 4.2
JOURNAL 34 3.4% 8 23.5% 2,641 12527.7 20112.1
EXACT JOURNAL 8 0.8% 5 62.5% 3,372 2813.3 2031.5
SUBJECT 145 14.4% 42 29.0% 24 197.6 507.0
EXACT SUBJECT 9 0.9% 6 66.7% 42 356.7 560.7
KEYWORD 211 20.9% 51 24.2% 33 1806.1 11944.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.2% 0 0.0% 1,503 1503.0 2119.9
DATE 27 2.7% 8 29.6% 23 109.0 202.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 41 4.1% 6 14.6% 8 156.8 610.8
EXACT PE 12 1.2% 1 8.3% 2 10.5 22.5
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 6 0.6% 1 16.7% 459 1572.4 2119.3
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 54 5.6% 20 37.0% 12 381.0 1035.2
Single 902 94.3% 239 26.5% 18 1110.1 7634.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.5%
SHORT 65.1%
LONG 1.6%
FIELDS 0.1%
PERIODICALS 3.0%
COMMENTS 0.0%
Other 28.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:00
Average session length (minutes:seconds) 3:28
Longest session recorded (minutes:seconds) 11:17
Average number of searches completed per session 1.5
Retrievals per search - median 11.5
Retrievals per search - average 523.0
Retrievals per search - standard deviation 1448.9
Percent of searches completed with 0 results 23.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 30 29.4%
DISPLAY (excluding automatic displays) 22 21.6%
HELP 4 3.9%
EXPLAIN 2 2.0%
SET/RESET 5 4.9%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 32 31.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 7 6.9%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 3 10.0% 0 0.0% 1 1.0 0.0
TITLE WORD 10 33.3% 4 40.0% 354 627.0 709.5
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 8 26.7% 2 25.0% 35 545.8 1192.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 8 26.7% 1 12.5% 124 1235.6 2727.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 1 3.3% 0 0.0% 2 2.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 30 100% 7 23.3% 62 682.2 1629.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 51.0%
LONG 2.0%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 46.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 418
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 11
displays or when any of these paging options is set.
TEXT included with MAIL commands 121
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:02
Average session length (minutes:seconds) 12:30
Longest session recorded (minutes:seconds) 63:20
Average number of searches completed per session 1.7
Retrievals per search - median 7.0
Retrievals per search - average 311.1
Retrievals per search - standard deviation 829.6
Percent of searches completed with 0 results 19.6%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 53 25.5%
DISPLAY (excluding automatic displays) 60 28.8%
HELP 8 3.8%
EXPLAIN 7 3.4%
SET/RESET 14 6.7%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 3 1.4%
LOGON or LOGOFF 44 21.2%
COMMENT 0 0.0%
SAVE 10 4.8%
USE 0 0.0%
OTHER 9 4.3%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTHOR 8 12.3% 3 37.5% 15 522.8 795.9
TITLE WORD 19 29.2% 3 15.8% 63 517.8 1249.5
EXACT TITLE 3 4.6% 1 33.3% 1 1.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 9 13.8% 0 0.0% 149 532.4 863.1
SUBJECT 10 15.4% 1 10.0% 16 625.6 995.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 12 18.5% 3 25.0% 10 36.1 86.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 3 4.6% 0 0.0% 14 12.7 10.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.5% 0 0.0% 144 144.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 0 0.0% 0 0.0% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 10 18.9% 0 0.0% 128 481.4 829.6
Single 43 81.1% 11 25.6% 10 380.8 983.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.8%
SHORT 53.1%
LONG 1.5%
FIELDS 2.3%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 41.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.0%
Ten most frequent errors:
1. First word of command is invalid 32.3%
2. NS command - no next screen 26.5%
3. FIND command with invalid index name 12.9%
4. DISPLAY command contains invalid word 3.6%
5. PS command - no previous screen 3.0%
6. Search term missing from search command 2.2%
7. Command contains escape or arrow key 2.2%
8. DISPLAY command - no FIND results 2.0%
9. MAIL command issued w/o email address 2.0%
10. Valid command at an inappropriate time 1.8%
11. All others 11.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 42.5%
2. LOCATE (ARTICLE DBS) 15.1%
3. MAGS DATABASE 6.8%
4. FIND 5.5%
5. INDEXES 5.5%
6. COMMANDS 5.5%
7. Unrecognized term 5.5%
8. LOCATIONS 4.1%
9. NEWS DATABASE 1.4%
10. A044 1.4%
11. All others 6.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 32.1%
2. First word of command is invalid 24.1%
3. FIND command with invalid index name 9.9%
4. DISPLAY command - middle of >1 screen 6.8%
5. FIND command with zero results 3.7%
6. DISPLAY command-complete in one screen 3.1%
7. DISPLAY command - no FIND results 2.5%
8. NS command - no next screen 2.5%
9. FIND command retrieves 1 book 2.5%
10. DISPLAY command-first of >1 screen 2.5%
11. All others 10.5%
Ten most frequent SHOW requests:
1. HISTORY 28.6%
2. SETTINGS (IAC DBS) 14.3%
3. GLOSSARY 14.3%
4. 0408 14.3%
5. SEARCH 14.3%
6. DATABASES 14.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)