MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/01/99 through 06/30/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 980 2,274 3,254
Davis 2,896 171 3,067
Irvine 3,882 0 3,882
Los Angeles 525 2,653 3,178
Riverside 2,142 260 2,402
San Diego 267 655 922
San Francisco 583 13 596
Santa Barbara 2,014 559 2,573
Santa Cruz 1,674 615 2,289
LBL 0 141 141
LLL 0 30 30
Los Alamos n/a 6 6
Other - UC 74 297 371
Stanford 584
Other-Network UC n/a 1,128 1,128
_______ ______ _____
15,037 8,802 24,423
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 409 1,836 25,862
2-4 a.m. 149 669 9,676
4-6 a.m. 113 442 4,042
6-8 a.m. 271 707 8,108
8-10 a.m. 1,689 4,753 48,240
10-12 a.m. 3,550 11,202 117,753
12-2 p.m. 4,441 14,954 149,271
2-4 p.m. 5,132 17,821 188,601
4-6 p.m. 3,823 13,447 138,658
6-8 p.m. 2,010 7,636 82,513
8-10 p.m. 1,793 6,603 76,186
10-12 p.m. 1,043 4,216 48,859
__________ __________ __________ _________________
Total: 24,423 84,286 897,769
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,058 6,073 9,131
Davis 9,590 512 10,102
Irvine 14,194 0 14,194
Los Angeles 1,704 9,419 11,123
Riverside 8,416 822 9,238
San Diego 749 2,086 2,835
San Francisco 1,711 25 1,736
Santa Barbara 7,122 1,870 8,992
Santa Cruz 6,689 2,084 8,773
LBL 0 507 507
LLL 0 47 47
Los Alamos n/a 15 15
Other - UC 199 1,008 1,207
Stanford 2,032
Other-Network UC n/a 4,354 4,354
_______ ______ _____
53,432 28,822 84,286
Number of FIND commands by database
MAGS database 75,056
NEWS database 6,839
COMP database 2,391
Total number of FIND commands 84,286
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 32,281 70,634 102,915
Davis 88,787 5,542 94,329
Irvine 110,313 0 110,313
Los Angeles 25,316 145,016 170,332
Riverside 79,226 10,002 89,228
San Diego 6,352 21,233 27,585
San Francisco 19,147 89 19,236
Santa Barbara 69,682 22,584 92,266
Santa Cruz 61,702 25,130 86,832
LBL 0 5,633 5,633
LLL 0 424 424
Los Alamos n/a 255 255
Other - UC 2,310 9,430 11,740
Stanford 3,575
Other-Network UC n/a 64,786 64,786
_______ ______ _____
495,116 380,758 879,449
Number of Records Displayed by database:
MAGS database 817,067
NEWS database 52,459
COMP database 28,243
Total number of Records Displayed 879,449
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.5%
Percent of NEWS sessions 10.2%
Percent of COMP sessions 3.4%
Percent of searches done in the MAGS database 89.0%
Percent of searches done in the NEWS database 8.1%
Percent of searches done in the COMP database 2.8%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 8:11
Average session length (minutes:seconds) 13:20
Longest session recorded (minutes:seconds) 1095
Average number of searches completed per session 3.5
Retrievals per search - median 5.0
Retrievals per search - average 507.3
Retrievals per search - standard deviation 5210.4
Percent of searches completed with 0 results 32.1%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 50.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 70,237 27.5%
DISPLAY (excluding automatic displays) 110,640 43.4%
HELP 6,841 2.7%
EXPLAIN 4,962 1.9%
SET/RESET 6,026 2.4%
SHOW 1,069 0.4%
ADD ON (AND, OR, AND NOT) 4,819 1.9%
LOGON or LOGOFF 31,163 12.2%
COMMENT 4 0.0%
SAVE 4,385 1.7%
USE 77 0.0%
OTHER 14,745 5.8%
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 10,529 14.4% 3,102 29.5% 9 72.8 263.5
TITLE WORD 12,852 17.6% 4,068 31.7% 12 392.1 3163.3
EXACT TITLE 1,967 2.7% 855 43.5% 3 65.8 351.9
JOURNAL 3,028 4.2% 1,537 50.8% 835 5502.9 14836.1
EXACT JOURNAL 2,096 2.9% 906 43.2% 598 4303.9 10588.2
SUBJECT 15,963 21.9% 6,907 43.3% 46 378.0 2562.5
EXACT SUBJECT 929 1.3% 464 49.9% 28 373.0 939.1
KEYWORD 22,345 30.6% 4,949 22.1% 25 888.3 8809.9
SUBFILE 87 0.1% 20 23.0% 33 407.5 1470.9
PUBLICATION TYPE 126 0.2% 17 13.5% 15 697.5 6184.6
DATE 689 0.9% 177 25.7% 26 212.3 1348.8
ADDED 7 0.0% 0 0.0% 38,643 28754.9 19904.1
PERIODICAL 1,152 1.6% 272 23.6% 9 321.9 2014.2
EXACT PE 580 0.8% 140 24.1% 5 55.0 269.2
RPE 2 0.0% 2 100% 0 0.0 0.0
XRP 1 0.0% 0 0.0% 8 8.0 0.0
COMMENTS 1 0.0% 0 0.0% 4,066 4066.0 0.0
Other indexes 583 0.8% 128 22.0% 99 2159.4 6141.1
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 3,242 4.7% 1,113 34.3% 10 579.1 5367.2
Single 66,278 95.3% 21,241 32.0% 22 791.5 6541.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 66.4%
LONG 1.5%
FIELDS 0.6%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 28.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:00
Average session length (minutes:seconds) 12:13
Longest session recorded (minutes:seconds) 332:23
Average number of searches completed per session 2.9
Retrievals per search - median 10.0
Retrievals per search - average 869.7
Retrievals per search - standard deviation 6340.3
Percent of searches completed with 0 results 26.0%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,005 23.4%
DISPLAY (excluding automatic displays) 3,632 42.3%
HELP 237 2.8%
EXPLAIN 186 2.2%
SET/RESET 303 3.5%
SHOW 61 0.7%
ADD ON (AND, OR, AND NOT) 386 4.5%
LOGON or LOGOFF 1,109 12.9%
COMMENT 1 0.0%
SAVE 164 1.9%
USE 5 0.1%
OTHER 496 5.8%
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 200 9.5% 89 44.5% 8 103.8 281.9
TITLE WORD 554 26.3% 155 28.0% 20 681.0 7259.8
EXACT TITLE 10 0.5% 8 80.0% 406 406.0 572.8
JOURNAL 59 2.8% 33 55.9% 2,078 12352.1 29375.3
EXACT JOURNAL 36 1.7% 18 50.0% 810 13528.9 22678.7
SUBJECT 374 17.8% 131 35.0% 66 697.9 1651.4
EXACT SUBJECT 19 0.9% 2 10.5% 413 616.8 808.5
KEYWORD 741 35.2% 118 15.9% 55 1452.3 7545.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 12 0.6% 5 41.7% 5 36.6 67.5
DATE 49 2.3% 7 14.3% 27 386.9 1389.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 17 0.8% 8 47.1% 6 65.9 136.3
EXACT PE 4 0.2% 0 0.0% 2 18.0 32.7
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 31 1.5% 7 22.6% 468 1211.2 1817.9
By number of indexes:
Multiple 116 5.8% 34 29.3% 29 551.6 1444.3
Single 1,870 94.2% 512 27.4% 39 1391.1 8298.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.9%
SHORT 62.9%
LONG 1.7%
FIELDS 2.3%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 28.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 19,176
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 735
displays or when any of these paging options is set.
TEXT included with MAIL commands 4,102
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:38
Average session length (minutes:seconds) 10:30
Longest session recorded (minutes:seconds) 376:42
Average number of searches completed per session 2.7
Retrievals per search - median 3.0
Retrievals per search - average 2679.7
Retrievals per search - standard deviation 43845
Percent of searches completed with 0 results 36.4%
Percent of searches entered that are long 2.0%
Percent of long searches completed
(includes partial results) 53.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 6,203 34.7%
DISPLAY (excluding automatic displays) 4,606 25.8%
HELP 757 4.2%
EXPLAIN 460 2.6%
SET/RESET 1,034 5.8%
SHOW 96 0.5%
ADD ON (AND, OR, AND NOT) 636 3.6%
LOGON or LOGOFF 3,099 17.3%
COMMENT 0 0.0%
SAVE 149 0.8%
USE 4 0.0%
OTHER 828 4.6%
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 553 8.4% 313 56.6% 10 234.8 544.9
TITLE WORD 1,391 21.2% 430 30.9% 17 685.6 3162.8
EXACT TITLE 89 1.4% 43 48.3% 13 82.4 138.6
JOURNAL 136 2.1% 55 40.4% 407 191893 353944
EXACT JOURNAL 61 0.9% 31 50.8% 44 779.0 2449.3
SUBJECT 1,728 26.3% 767 44.4% 46 630.8 2798.4
EXACT SUBJECT 58 0.9% 32 55.2% 58 1073.2 2179.7
KEYWORD 2,267 34.5% 615 27.1% 23 625.0 2963.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 19 0.3% 7 36.8% 10 810.6 2689.2
DATE 204 3.1% 52 25.5% 24 278.2 1737.8
ADDED 1 0.0% 0 0.0% 4 4.0 0.0
PERIODICAL 25 0.4% 6 24.0% 87 125.4 139.9
EXACT PE 11 0.2% 5 45.5% 8 21.2 35.8
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 22 0.3% 7 31.8% 56 92.4 151.9
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 391 6.4% 128 32.7% 17 405.7 1811.1
Single 5,743 93.6% 2,096 36.5% 26 4878.1 59597.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 48.9%
LONG 3.2%
FIELDS 0.8%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 43.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.1%
Ten most frequent errors:
1. First word of command is invalid 36.1%
2. NS command - no next screen 26.3%
3. FIND command with invalid index name 10.5%
4. PS command - no previous screen 4.7%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.5%
7. Search term missing from search command 1.8%
8. DISPLAY command-record numbers too large 1.2%
9. MAIL command issued w/o email address 0.9%
10. Add-on search, no index name after verb 0.9%
11. All others 11.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.4%
2. LOCATE (ARTICLE DBS) 16.7%
3. FIND 8.8%
4. COMMANDS 8.6%
5. INDEXES 7.0%
6. Unrecognized term 4.4%
7. MAGS DATABASE 4.0%
8. ADDON SEARCH 3.5%
9. DISPLAYS (IAC DBS) 2.5%
10. MAIL 2.1%
11. All others 17.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.4%
2. First word of command is invalid 18.4%
3. FIND command with invalid index name 10.0%
4. FIND command with zero results 7.2%
5. DISPLAY command-first of >1 screen 5.5%
6. DISPLAY command - middle of >1 screen 5.2%
7. DISPLAY command-complete in one screen 4.1%
8. FIND command retrieves >1 book 4.0%
9. NS command - no next screen 3.0%
10. PS command - no previous screen 2.0%
11. All others 17.4%
Ten most frequent SHOW requests:
1. HISTORY 33.3%
2. SEARCH 32.7%
3. MAIL STATUS 11.6%
4. MAIL SETTINGS 5.0%
5. IAC NEWS 3.7%
6. SETTINGS (IAC DBS) 3.3%
7. GLOSSARY 3.0%
8. SYSTEM NEWS 1.8%
9. DISPLAY 1.2%
10. DATABASES 0.3%
11. All others 4.0%