MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/01/00 through 11/30/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,245 2,260 3,505
Davis 1,202 57 1,259
Irvine 1,147 0 1,147
Los Angeles 67 691 758
Riverside 527 112 639
San Diego 126 214 340
San Francisco 239 0 239
Santa Barbara 384 213 597
Santa Cruz 577 506 1,083
LBL 0 41 41
LLL 0 13 13
Los Alamos n/a 1 1
Other - UC 19 515 534
Stanford 239
Other-Network UC n/a 723 723
_______ ______ _____
5,533 5,346 11,118
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 168 512 6,890
2-4 a.m. 52 165 6,309
4-6 a.m. 47 145 1,640
6-8 a.m. 108 331 4,754
8-10 a.m. 673 1,740 91,919
10-12 a.m. 1,635 4,605 267,078
12-2 p.m. 2,147 6,287 77,003
2-4 p.m. 2,496 7,631 86,344
4-6 p.m. 1,768 5,406 52,971
6-8 p.m. 850 2,799 33,709
8-10 p.m. 781 2,416 32,962
10-12 p.m. 393 1,409 15,410
__________ __________ __________ _________________
Total: 11,118 33,446 676,989
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,320 6,604 10,924
Davis 3,242 111 3,353
Irvine 3,630 0 3,630
Los Angeles 231 1,959 2,190
Riverside 1,816 338 2,154
San Diego 388 616 1,004
San Francisco 614 0 614
Santa Barbara 914 644 1,558
Santa Cruz 1,864 1,313 3,177
LBL 0 96 96
LLL 0 38 38
Los Alamos n/a 4 4
Other - UC 41 1,608 1,649
Stanford 644
Other-Network UC n/a 2,411 2,411
_______ ______ _____
17,060 15,742 33,446
Number of FIND commands by database
MAGS database 30,075
NEWS database 2,595
COMP database 776
Total number of FIND commands 33,446
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 43,523 85,215 128,738
Davis 35,017 908 35,925
Irvine 30,835 0 30,835
Los Angeles 3,520 26,014 29,534
Riverside 16,439 3,601 20,040
San Diego 2,801 309,099 311,900
San Francisco 6,271 0 6,271
Santa Barbara 8,469 11,803 20,272
Santa Cruz 15,211 10,651 25,862
LBL 0 762 762
LLL 0 432 432
Los Alamos n/a 66 66
Other - UC 479 24,956 25,435
Stanford 1,069
Other-Network UC n/a 34,231 34,231
_______ ______ _____
162,565 507,738 671,372
Number of Records Displayed by database:
MAGS database 629,132
NEWS database 30,447
COMP database 17,410
Total number of Records Displayed 671,372
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.8%
Percent of NEWS sessions 9.2%
Percent of COMP sessions 3.0%
Percent of searches done in the MAGS database 89.9%
Percent of searches done in the NEWS database 7.8%
Percent of searches done in the COMP database 2.3%
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 3.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:12
Average session length (minutes:seconds) 11:57
Longest session recorded (minutes:seconds) 538:41
Average number of searches completed per session 3.1
Retrievals per search - median 5.0
Retrievals per search - average 555.9
Retrievals per search - standard deviation 5991.9
Percent of searches completed with 0 results 31.3%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 53.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 28,220 28.7%
DISPLAY (excluding automatic displays) 37,223 37.9%
HELP 3,762 3.8%
EXPLAIN 2,702 2.7%
SET/RESET 3,126 3.2%
SHOW 463 0.5%
ADD ON (AND, OR, AND NOT) 1,855 1.9%
LOGON or LOGOFF 13,950 14.2%
COMMENT 0 0.0%
SAVE 1,586 1.6%
USE 18 0.0%
OTHER 5,397 5.5%
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 4,657 15.9% 1,287 27.6% 9 69.6 256.7
TITLE WORD 5,243 17.9% 1,610 30.7% 13 509.9 3327.5
EXACT TITLE 1,116 3.8% 611 54.7% 2 67.7 308.2
JOURNAL 1,341 4.6% 679 50.6% 996 4369.6 11523.9
EXACT JOURNAL 644 2.2% 298 46.3% 1,250 5732.6 10745.4
SUBJECT 7,113 24.4% 2,782 39.1% 33 356.7 2039.4
EXACT SUBJECT 354 1.2% 155 43.8% 56 4376.2 53846.8
KEYWORD 7,544 25.8% 1,522 20.2% 26 956.5 6361.8
SUBFILE 5 0.0% 1 20.0% 45 420.8 782.5
PUBLICATION TYPE 102 0.3% 23 22.5% 10 235.3 856.1
DATE 244 0.8% 44 18.0% 16 302.8 741.3
ADDED 15 0.1% 1 6.7% 45,919 37856.4 16340.3
PERIODICAL 418 1.4% 85 20.3% 8 283.0 2231.3
EXACT PE 151 0.5% 32 21.2% 3 24.5 82.8
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 258 0.9% 50 19.4% 570 3378.2 7472.9
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 1,179 4.2% 377 32.0% 10 495.6 2155.0
Single 26,790 95.8% 8,403 31.4% 21 858.5 7581.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 63.5%
LONG 1.6%
FIELDS 0.8%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 31.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:30
Average session length (minutes:seconds) 11:26
Longest session recorded (minutes:seconds) 272:36
Average number of searches completed per session 2.3
Retrievals per search - median 4.0
Retrievals per search - average 863.8
Retrievals per search - standard deviation 6708.7
Percent of searches completed with 0 results 34.5%
Percent of searches entered that are long 1.9%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 706 24.4%
DISPLAY (excluding automatic displays) 1,115 38.5%
HELP 110 3.8%
EXPLAIN 74 2.6%
SET/RESET 113 3.9%
SHOW 5 0.2%
ADD ON (AND, OR, AND NOT) 70 2.4%
LOGON or LOGOFF 456 15.7%
COMMENT 0 0.0%
SAVE 98 3.4%
USE 1 0.0%
OTHER 149 5.1%
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 95 13.1% 54 56.8% 4 47.2 211.9
TITLE WORD 153 21.1% 43 28.1% 26 1422.6 6629.3
EXACT TITLE 13 1.8% 6 46.2% 2 224.1 438.7
JOURNAL 25 3.5% 16 64.0% 411 8353.2 15468.4
EXACT JOURNAL 11 1.5% 3 27.3% 3,730 21738.6 52869.0
SUBJECT 151 20.9% 63 41.7% 31 957.7 5434.3
EXACT SUBJECT 9 1.2% 6 66.7% 12,194 14546.3 15832.1
KEYWORD 245 33.8% 61 24.9% 55 594.9 1404.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.7% 1 20.0% 59 634.5 1189.3
DATE 8 1.1% 3 37.5% 4 6.2 7.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 1.1% 1 12.5% 1 5.9 7.2
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 1 0.1% 0 0.0% 2,933 2933.0 0.0
By number of indexes:
Multiple 24 3.4% 8 33.3% 5 207.1 727.9
Single 676 96.6% 241 35.6% 30 1483.6 8871.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.1%
SHORT 65.8%
LONG 1.2%
FIELDS 1.6%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 26.0%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 7,210
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 325
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,572
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:59
Average session length (minutes:seconds) 9:00
Longest session recorded (minutes:seconds) 332:19
Average number of searches completed per session 2.5
Retrievals per search - median 3.0
Retrievals per search - average 2076.4
Retrievals per search - standard deviation 40183
Percent of searches completed with 0 results 38.0%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 57.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,433 33.7%
DISPLAY (excluding automatic displays) 1,587 22.0%
HELP 367 5.1%
EXPLAIN 255 3.5%
SET/RESET 371 5.1%
SHOW 55 0.8%
ADD ON (AND, OR, AND NOT) 162 2.2%
LOGON or LOGOFF 1,434 19.8%
COMMENT 0 0.0%
SAVE 236 3.3%
USE 1 0.0%
OTHER 327 4.5%
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 129 5.1% 49 38.0% 29 393.6 1310.7
TITLE WORD 532 21.2% 165 31.0% 11 503.3 2836.1
EXACT TITLE 27 1.1% 14 51.9% 1 40.5 97.7
JOURNAL 39 1.6% 27 69.2% 117 315568 514774
EXACT JOURNAL 7 0.3% 6 85.7% 15 15.0 0.0
SUBJECT 922 36.7% 427 46.3% 57 902.9 3625.4
EXACT SUBJECT 55 2.2% 33 60.0% 712 2088.8 2712.0
KEYWORD 724 28.8% 207 28.6% 26 1430.4 5505.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.2% 1 20.0% 30 28.3 25.2
DATE 58 2.3% 16 27.6% 26 68.3 109.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 10 0.4% 2 20.0% 10 15.6 18.5
EXACT PE 1 0.0% 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 5 0.2% 4 80.0% 146 146.0 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 99 4.1% 28 28.3% 13 56.9 99.7
Single 2,304 95.9% 892 38.7% 29 3704.6 54020.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 49.8%
LONG 2.8%
FIELDS 0.9%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 43.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.3%
Ten most frequent errors:
1. First word of command is invalid 37.6%
2. NS command - no next screen 22.6%
3. FIND command with invalid index name 13.1%
4. PS command - no previous screen 5.4%
5. DISPLAY command contains invalid word 3.2%
6. Valid command at an inappropriate time 2.6%
7. Search term missing from search command 2.2%
8. NS of SHOW/EXP command-no next screen 1.2%
9. MAIL command issued w/o email address 1.0%
10. DISPLAY command - no FIND results 1.0%
11. All others 10.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.8%
2. LOCATE (ARTICLE DBS) 22.5%
3. FIND 8.3%
4. COMMANDS 8.0%
5. INDEXES 5.6%
6. MAGS DATABASE 4.8%
7. Unrecognized term 4.7%
8. DISPLAYS (IAC DBS) 3.3%
9. ADDON SEARCH 2.5%
10. MAIL 2.0%
11. All others 12.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.1%
2. First word of command is invalid 19.6%
3. FIND command with invalid index name 10.9%
4. FIND command with zero results 6.0%
5. DISPLAY command-complete in one screen 5.4%
6. DISPLAY command - middle of >1 screen 5.3%
7. DISPLAY command-first of >1 screen 5.2%
8. FIND command retrieves >1 book 2.8%
9. NS command - no next screen 2.5%
10. PS command - no previous screen 2.3%
11. All others 15.8%
Ten most frequent SHOW requests:
1. HISTORY 37.5%
2. SEARCH 32.5%
3. MAIL STATUS 7.9%
4. SETTINGS (IAC DBS) 3.9%
5. IAC NEWS 3.6%
6. GLOSSARY 3.4%
7. SYSTEM NEWS 3.2%
8. MAIL SETTINGS 3.0%
9. LIBRARY NEWS 1.0%
10. DISPLAY 0.8%
11. All others 3.4%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)