MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/16/01 through 06/22/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 69 186 255
Davis 76 0 76
Irvine 66 0 66
Los Angeles 0 41 41
Riverside 13 5 18
San Diego 5 22 27
San Francisco 43 0 43
Santa Barbara 9 32 41
Santa Cruz 8 15 23
LBL 0 18 18
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 2 16 18
Stanford 28
Other-Network UC n/a 123 123
_______ ______ _____
291 459 778
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 11 36 686
2-4 a.m. 6 15 77
4-6 a.m. 8 40 643
6-8 a.m. 13 25 345
8-10 a.m. 107 252 1,786
10-12 a.m. 159 452 4,709
12-2 p.m. 131 331 2,963
2-4 p.m. 143 371 11,070
4-6 p.m. 91 224 4,085
6-8 p.m. 43 113 1,120
8-10 p.m. 34 116 978
10-12 p.m. 32 151 1,248
__________ __________ __________ _________________
Total: 778 2,126 29,710
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 174 458 632
Davis 163 0 163
Irvine 272 0 272
Los Angeles 0 71 71
Riverside 49 13 62
San Diego 15 44 59
San Francisco 89 0 89
Santa Barbara 29 74 103
Santa Cruz 49 65 114
LBL 0 37 37
LLL 0 6 6
Los Alamos n/a 0 0
Other - UC 4 56 60
Stanford 66
Other-Network UC n/a 392 392
_______ ______ _____
844 1,216 2,126
Number of FIND commands by database
MAGS database 1,930
NEWS database 106
COMP database 90
Total number of FIND commands 2,126
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,624 6,666 9,290
Davis 894 0 894
Irvine 1,825 0 1,825
Los Angeles 0 470 470
Riverside 392 70 462
San Diego 69 7,335 7,404
San Francisco 1,658 0 1,658
Santa Barbara 280 559 839
Santa Cruz 249 634 883
LBL 0 535 535
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 8 573 581
Stanford 138
Other-Network UC n/a 3,882 3,882
_______ ______ _____
7,999 20,726 28,863
Number of Records Displayed by database:
MAGS database 20,528
NEWS database 7,740
COMP database 1,442
Total number of Records Displayed 28,863
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.4%
Percent of NEWS sessions 7.6%
Percent of COMP sessions 5.0%
Percent of searches done in the MAGS database 90.8%
Percent of searches done in the NEWS database 5.0%
Percent of searches done in the COMP database 4.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:03
Average session length (minutes:seconds) 12:27
Longest session recorded (minutes:seconds) 539:38
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 343.2
Retrievals per search - standard deviation 1928.2
Percent of searches completed with 0 results 27.0%
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 1,727 28.8%
DISPLAY (excluding automatic displays) 2,166 36.1%
HELP 126 2.1%
EXPLAIN 133 2.2%
SET/RESET 291 4.9%
SHOW 12 0.2%
ADD ON (AND, OR, AND NOT) 203 3.4%
LOGON or LOGOFF 830 13.8%
COMMENT 0 0.0%
SAVE 184 3.1%
USE 1 0.0%
OTHER 322 5.4%
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 470 25.8% 142 30.2% 10 82.4 285.5
TITLE WORD 444 24.4% 131 29.5% 11 223.0 993.1
EXACT TITLE 38 2.1% 14 36.8% 3 25.6 59.7
JOURNAL 149 8.2% 62 41.6% 1,242 2864.4 5772.8
EXACT JOURNAL 30 1.6% 10 33.3% 785 1981.0 3715.5
SUBJECT 194 10.6% 64 33.0% 22 331.7 790.6
EXACT SUBJECT 16 0.9% 8 50.0% 460 455.9 389.2
KEYWORD 365 20.0% 84 23.0% 28 606.7 3091.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 1 1.0 0.0
DATE 25 1.4% 5 20.0% 22 48.0 83.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 40 2.2% 7 17.5% 5 38.5 66.0
EXACT PE 14 0.8% 1 7.1% 3 8.8 11.8
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 37 2.0% 2 5.4% 894 1203.5 1655.0
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 106 6.2% 42 39.6% 10 447.8 1343.1
Single 1,608 93.8% 445 27.7% 18 507.8 2408.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 59.4%
LONG 1.9%
FIELDS 1.0%
PERIODICALS 2.1%
COMMENTS 0.0%
Other 32.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 9:40
Average session length (minutes:seconds) 13:25
Longest session recorded (minutes:seconds) 58:30
Average number of searches completed per session 2.3
Retrievals per search - median 6.0
Retrievals per search - average 1304.2
Retrievals per search - standard deviation 10184
Percent of searches completed with 0 results 36.7%
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 79 24.9%
DISPLAY (excluding automatic displays) 132 41.6%
HELP 5 1.6%
EXPLAIN 14 4.4%
SET/RESET 20 6.3%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 11 3.5%
LOGON or LOGOFF 42 13.2%
COMMENT 0 0.0%
SAVE 2 0.6%
USE 0 0.0%
OTHER 11 3.5%
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 10 11.5% 8 80.0% 4 4.0 4.2
TITLE WORD 16 18.4% 9 56.3% 30 183.3 325.8
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 3 3.4% 1 33.3% 509 509.0 456.8
EXACT SUBJECT 2 2.3% 0 0.0% 106 106.0 0.0
KEYWORD 32 36.8% 7 21.9% 51 4143.6 19292.5
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 6 6.9% 0 0.0% 393 435.2 208.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 6 6.9% 2 33.3% 2 178.3 353.2
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 12 13.8% 4 33.3% 793 1231.4 974.5
By number of indexes:
Multiple 8 10.1% 2 25.0% 393 435.2 208.2
Single 71 89.9% 27 38.0% 47 2592.3 14536.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
SHORT 58.5%
LONG 0.5%
FIELDS 10.1%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 27.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 463
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 33
displays or when any of these paging options is set.
TEXT included with MAIL commands 74
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:10
Average session length (minutes:seconds) 7:32
Longest session recorded (minutes:seconds) 25:38
Average number of searches completed per session 1.8
Retrievals per search - median 2.0
Retrievals per search - average 278.5
Retrievals per search - standard deviation 1301.8
Percent of searches completed with 0 results 37.1%
Percent of searches entered that are long 6.6%
Percent of long searches completed
(includes partial results) 85.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 99 29.3%
DISPLAY (excluding automatic displays) 79 23.4%
HELP 6 1.8%
EXPLAIN 13 3.8%
SET/RESET 32 9.5%
SHOW 5 1.5%
ADD ON (AND, OR, AND NOT) 7 2.1%
LOGON or LOGOFF 76 22.5%
COMMENT 0 0.0%
SAVE 3 0.9%
USE 0 0.0%
OTHER 18 5.3%
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 9 8.3% 3 33.3% 80 277.3 493.4
TITLE WORD 32 29.6% 10 31.3% 6 558.7 2430.2
EXACT TITLE 4 3.7% 2 50.0% 308 308.0 434.2
JOURNAL 3 2.8% 3 100% 0 0.0 0.0
EXACT JOURNAL 2 1.9% 1 50.0% 30 30.0 0.0
SUBJECT 26 24.1% 10 38.5% 83 726.1 1569.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 27 25.0% 10 37.0% 24 186.6 587.3
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 5 4.6% 0 0.0% 2 795.2 1692.2
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 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 9 9.2% 2 22.2% 3 572.7 1433.0
Single 89 90.8% 35 39.3% 37 466.6 1726.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.7%
SHORT 41.6%
LONG 1.3%
FIELDS 10.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 46.3%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. First word of command is invalid 31.1%
2. NS command - no next screen 26.1%
3. FIND command with invalid index name 10.2%
4. NS of SHOW/EXP command-no next screen 6.6%
5. PS command - no previous screen 3.8%
6. DISPLAY command contains invalid word 3.4%
7. Search term missing from search command 2.1%
8. DISPLAY command - no FIND results 1.8%
9. Valid command at an inappropriate time 1.4%
10. MAIL command issued w/o email address 0.8%
11. All others 12.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 28.8%
2. LOCATE (ARTICLE DBS) 14.4%
3. FIND 10.0%
4. INDEXES 8.1%
5. COMMANDS 4.4%
6. MAGS DATABASE 3.8%
7. DATABASES 3.8%
8. MAIL 2.5%
9. A018 1.9%
10. G175 1.9%
11. All others 20.6%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.9%
2. First word of command is invalid 18.5%
3. FIND command with invalid index name 9.1%
4. FIND command with zero results 5.4%
5. DISPLAY command-complete in one screen 4.7%
6. NS command - no next screen 3.4%
7. DISPLAY command-first of >1 screen 3.4%
8. DISPLAY command - middle of >1 screen 3.0%
9. DISPLAY command - last of >1 screen 3.0%
10. PS command - no previous screen 2.4%
11. All others 19.2%
Ten most frequent SHOW requests:
1. HISTORY 52.9%
2. SYSTEM NEWS 17.6%
3. IAC NEWS 11.8%
4. LIBRARY NEWS 5.9%
5. SEARCH 5.9%
6. MAIL STATUS 5.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)