MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/01/00 through 09/30/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 916 1,879 2,795
Davis 695 25 720
Irvine 541 0 541
Los Angeles 55 372 427
Riverside 135 91 226
San Diego 185 277 462
San Francisco 248 0 248
Santa Barbara 223 149 372
Santa Cruz 308 220 528
LBL 0 61 61
LLL 0 17 17
Los Alamos n/a 2 2
Other - UC 7 235 242
Stanford 213
Other-Network UC n/a 552 552
_______ ______ _____
3,313 3,880 7,406
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 98 360 5,022
2-4 a.m. 55 167 3,466
4-6 a.m. 24 79 1,576
6-8 a.m. 81 215 2,806
8-10 a.m. 661 1,837 16,350
10-12 a.m. 1,283 3,451 37,435
12-2 p.m. 1,461 4,292 65,749
2-4 p.m. 1,658 4,546 50,102
4-6 p.m. 1,055 3,136 57,241
6-8 p.m. 427 1,345 15,507
8-10 p.m. 346 1,147 14,301
10-12 p.m. 257 873 10,957
__________ __________ __________ _________________
Total: 7,406 21,448 280,512
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,909 5,354 8,263
Davis 1,907 79 1,986
Irvine 1,534 0 1,534
Los Angeles 105 1,127 1,232
Riverside 325 295 620
San Diego 463 729 1,192
San Francisco 680 0 680
Santa Barbara 670 417 1,087
Santa Cruz 812 515 1,327
LBL 0 119 119
LLL 0 35 35
Los Alamos n/a 2 2
Other - UC 18 721 739
Stanford 686
Other-Network UC n/a 1,946 1,946
_______ ______ _____
9,423 11,339 21,448
Number of FIND commands by database
MAGS database 19,043
NEWS database 1,641
COMP database 764
Total number of FIND commands 21,448
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 29,706 59,567 89,273
Davis 28,433 1,017 29,450
Irvine 14,291 0 14,291
Los Angeles 2,181 16,122 18,303
Riverside 3,396 2,559 5,955
San Diego 2,936 30,940 33,876
San Francisco 6,728 0 6,728
Santa Barbara 5,772 6,031 11,803
Santa Cruz 6,942 4,526 11,468
LBL 0 2,517 2,517
LLL 0 465 465
Los Alamos n/a 94 94
Other - UC 139 9,794 9,933
Stanford 924
Other-Network UC n/a 27,843 27,843
_______ ______ _____
100,524 161,475 262,923
Number of Records Displayed by database:
MAGS database 240,999
NEWS database 13,594
COMP database 25,919
Total number of Records Displayed 262,923
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.2%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 4.6%
Percent of searches done in the MAGS database 88.8%
Percent of searches done in the NEWS database 7.7%
Percent of searches done in the COMP database 3.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 4.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:40
Average session length (minutes:seconds) 11:27
Longest session recorded (minutes:seconds) 965:15
Average number of searches completed per session 3.0
Retrievals per search - median 5.0
Retrievals per search - average 544.4
Retrievals per search - standard deviation 7256.0
Percent of searches completed with 0 results 31.1%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 51.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 17,863 29.0%
DISPLAY (excluding automatic displays) 23,561 38.3%
HELP 1,714 2.8%
EXPLAIN 1,325 2.2%
SET/RESET 2,338 3.8%
SHOW 187 0.3%
ADD ON (AND, OR, AND NOT) 1,180 1.9%
LOGON or LOGOFF 8,572 13.9%
COMMENT 0 0.0%
SAVE 1,312 2.1%
USE 15 0.0%
OTHER 3,474 5.6%
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 3,789 20.4% 1,135 30.0% 10 65.4 242.5
TITLE WORD 4,060 21.9% 1,245 30.7% 10 408.5 2903.7
EXACT TITLE 559 3.0% 277 49.6% 2 53.4 222.9
JOURNAL 1,016 5.5% 530 52.2% 1,119 5223.0 11505.3
EXACT JOURNAL 410 2.2% 166 40.5% 1,040 5586.4 10403.3
SUBJECT 3,870 20.9% 1,436 37.1% 21 689.0 16827.7
EXACT SUBJECT 108 0.6% 29 26.9% 123 593.7 1208.9
KEYWORD 3,832 20.7% 819 21.4% 23 910.0 8389.6
SUBFILE 18 0.1% 0 0.0% 17 281.6 555.1
PUBLICATION TYPE 41 0.2% 10 24.4% 28 413.2 1233.5
DATE 183 1.0% 39 21.3% 23 139.7 340.3
ADDED 6 0.0% 1 16.7% 60,312 50554.2 17212.9
PERIODICAL 358 1.9% 74 20.7% 10 134.1 992.7
EXACT PE 132 0.7% 19 14.4% 2 20.1 115.6
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 159 0.9% 28 17.6% 146 2434.1 6752.2
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 803 4.5% 252 31.4% 11 786.4 11022.4
Single 16,903 95.5% 5,289 31.3% 17 817.0 8898.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
SHORT 60.9%
LONG 1.9%
FIELDS 1.5%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 31.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:35
Average session length (minutes:seconds) 10:39
Longest session recorded (minutes:seconds) 222:26
Average number of searches completed per session 2.2
Retrievals per search - median 5.0
Retrievals per search - average 1493.9
Retrievals per search - standard deviation 18466
Percent of searches completed with 0 results 32.1%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 58.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 705 24.7%
DISPLAY (excluding automatic displays) 1,111 39.0%
HELP 84 2.9%
EXPLAIN 86 3.0%
SET/RESET 118 4.1%
SHOW 14 0.5%
ADD ON (AND, OR, AND NOT) 59 2.1%
LOGON or LOGOFF 469 16.4%
COMMENT 0 0.0%
SAVE 30 1.1%
USE 3 0.1%
OTHER 173 6.1%
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 12.5% 56 58.9% 2 23.3 80.7
TITLE WORD 207 27.3% 64 30.9% 33 1235.9 5091.1
EXACT TITLE 6 0.8% 2 33.3% 10 8.3 4.9
JOURNAL 37 4.9% 16 43.2% 227 11326.7 34077.4
EXACT JOURNAL 18 2.4% 8 44.4% 182 1188.1 2396.9
SUBJECT 90 11.9% 30 33.3% 26 306.0 791.0
EXACT SUBJECT 12 1.6% 4 33.3% 134 927.9 1221.6
KEYWORD 231 30.4% 53 22.9% 30 3603.3 35783.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 15 2.0% 5 33.3% 82 598.9 859.3
DATE 18 2.4% 5 27.8% 10 49.8 77.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 21 2.8% 9 42.9% 8 261.1 458.9
EXACT PE 1 0.1% 1 100% 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 8 1.1% 2 25.0% 788 1622.2 2789.8
By number of indexes:
Multiple 56 8.0% 23 41.1% 11 393.5 1296.0
Single 642 92.0% 208 32.4% 31 2506.8 24320.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.5%
SHORT 60.9%
LONG 1.7%
FIELDS 1.9%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 28.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 4,717
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 238
displays or when any of these paging options is set.
TEXT included with MAIL commands 848
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:21
Average session length (minutes:seconds) 8:33
Longest session recorded (minutes:seconds) 137:22
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 2267.5
Retrievals per search - standard deviation 40311
Percent of searches completed with 0 results 38.4%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 36.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,537 31.9%
DISPLAY (excluding automatic displays) 1,055 21.9%
HELP 198 4.1%
EXPLAIN 140 2.9%
SET/RESET 308 6.4%
SHOW 24 0.5%
ADD ON (AND, OR, AND NOT) 104 2.2%
LOGON or LOGOFF 850 17.6%
COMMENT 0 0.0%
SAVE 378 7.8%
USE 4 0.1%
OTHER 221 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 163 10.3% 80 49.1% 33 346.9 702.0
TITLE WORD 417 26.2% 154 36.9% 11 755.8 7763.9
EXACT TITLE 41 2.6% 31 75.6% 14 38.7 43.4
JOURNAL 21 1.3% 14 66.7% 395921 414046 483730
EXACT JOURNAL 7 0.4% 5 71.4% 6,753 6753.0 9548.8
SUBJECT 456 28.7% 187 41.0% 39 514.9 2526.5
EXACT SUBJECT 42 2.6% 16 38.1% 81 262.0 647.4
KEYWORD 398 25.0% 116 29.1% 26 1363.0 6945.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.3% 4 80.0% 3 3.0 0.0
DATE 27 1.7% 7 25.9% 31 165.8 217.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 9 0.6% 2 22.2% 29 32.7 31.6
EXACT PE 2 0.1% 0 0.0% 7 6.5 6.4
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 2 0.1% 1 50.0% 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 71 4.7% 22 31.0% 11 326.5 1925.3
Single 1,445 95.3% 573 39.7% 32 4175.6 54850.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.8%
SHORT 52.6%
LONG 3.3%
FIELDS 1.5%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 38.1%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.2%
Ten most frequent errors:
1. First word of command is invalid 36.1%
2. NS command - no next screen 24.5%
3. FIND command with invalid index name 13.0%
4. PS command - no previous screen 3.6%
5. DISPLAY command contains invalid word 3.4%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 2.2%
8. Max. # of ports to a Z39 db are in use 1.3%
9. DISPLAY command - no FIND results 1.2%
10. MAIL command issued w/o email address 1.1%
11. All others 11.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.0%
2. LOCATE (ARTICLE DBS) 17.9%
3. FIND 8.3%
4. COMMANDS 7.5%
5. INDEXES 7.0%
6. MAGS DATABASE 6.5%
7. Unrecognized term 4.1%
8. DISPLAYS (IAC DBS) 2.6%
9. DATABASES 2.3%
10. ADDON SEARCH 2.1%
11. All others 18.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.2%
2. First word of command is invalid 18.4%
3. FIND command with invalid index name 10.9%
4. FIND command with zero results 7.9%
5. DISPLAY command-complete in one screen 4.8%
6. DISPLAY command - middle of >1 screen 4.7%
7. DISPLAY command-first of >1 screen 4.4%
8. FIND command retrieves >1 book 3.2%
9. NS command - no next screen 2.5%
10. PS command - no previous screen 1.7%
11. All others 16.3%
Ten most frequent SHOW requests:
1. HISTORY 46.1%
2. SEARCH 24.8%
3. IAC NEWS 6.3%
4. GLOSSARY 6.3%
5. SYSTEM NEWS 2.9%
6. MAIL SETTINGS 2.9%
7. SETTINGS (IAC DBS) 2.4%
8. MAIL STATUS 2.4%
9. LIBRARY NEWS 1.5%
10. UCB LIBRARY HOURS 1.0%
11. All others 3.4%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)