MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/14/01 through 04/20/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 279 422 701
Davis 227 1 228
Irvine 299 0 299
Los Angeles 6 61 67
Riverside 38 20 58
San Diego 17 35 52
San Francisco 46 0 46
Santa Barbara 18 28 46
Santa Cruz 62 35 97
LBL 0 6 6
LLL 0 0 0
Los Alamos n/a 1 1
Other - UC 2 67 69
Stanford 41
Other-Network UC n/a 126 126
_______ ______ _____
994 802 1,837
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 34 112 1,456
2-4 a.m. 13 35 374
4-6 a.m. 7 18 136
6-8 a.m. 29 94 2,333
8-10 a.m. 148 381 4,501
10-12 a.m. 369 1,187 10,648
12-2 p.m. 310 985 8,794
2-4 p.m. 375 992 12,441
4-6 p.m. 299 828 9,871
6-8 p.m. 130 499 3,587
8-10 p.m. 76 169 1,094
10-12 p.m. 47 164 1,598
__________ __________ __________ _________________
Total: 1,837 5,464 56,833
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,018 1,076 2,094
Davis 617 5 622
Irvine 912 0 912
Los Angeles 11 167 178
Riverside 116 42 158
San Diego 46 83 129
San Francisco 122 0 122
Santa Barbara 30 82 112
Santa Cruz 210 84 294
LBL 0 11 11
LLL 0 0 0
Los Alamos n/a 1 1
Other - UC 2 235 237
Stanford 160
Other-Network UC n/a 434 434
_______ ______ _____
3,084 2,220 5,464
Number of FIND commands by database
MAGS database 4,699
NEWS database 647
COMP database 118
Total number of FIND commands 5,464
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 10,190 16,152 26,342
Davis 5,175 84 5,259
Irvine 5,223 0 5,223
Los Angeles 252 1,507 1,759
Riverside 877 625 1,502
San Diego 159 735 894
San Francisco 1,097 0 1,097
Santa Barbara 181 966 1,147
Santa Cruz 1,510 975 2,485
LBL 0 103 103
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 30 3,437 3,467
Stanford 161
Other-Network UC n/a 6,625 6,625
_______ ______ _____
24,694 31,209 56,064
Number of Records Displayed by database:
MAGS database 51,091
NEWS database 4,563
COMP database 1,179
Total number of Records Displayed 56,064
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 83.9%
Percent of NEWS sessions 13.2%
Percent of COMP sessions 2.9%
Percent of searches done in the MAGS database 86.0%
Percent of searches done in the NEWS database 11.8%
Percent of searches done in the COMP database 2.2%
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 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:10
Average session length (minutes:seconds) 10:45
Longest session recorded (minutes:seconds) 358:43
Average number of searches completed per session 3.0
Retrievals per search - median 5.0
Retrievals per search - average 409.4
Retrievals per search - standard deviation 3158.2
Percent of searches completed with 0 results 31.2%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 59.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,464 30.2%
DISPLAY (excluding automatic displays) 5,474 37.0%
HELP 574 3.9%
EXPLAIN 336 2.3%
SET/RESET 534 3.6%
SHOW 84 0.6%
ADD ON (AND, OR, AND NOT) 235 1.6%
LOGON or LOGOFF 2,130 14.4%
COMMENT 0 0.0%
SAVE 213 1.4%
USE 2 0.0%
OTHER 750 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 799 17.4% 227 28.4% 11 83.9 269.6
TITLE WORD 1,018 22.2% 318 31.2% 11 444.6 2839.3
EXACT TITLE 147 3.2% 52 35.4% 1 5.5 15.1
JOURNAL 229 5.0% 118 51.5% 590 5016.5 13211.7
EXACT JOURNAL 111 2.4% 50 45.0% 809 3730.0 8342.5
SUBJECT 929 20.2% 388 41.8% 22 263.0 910.4
EXACT SUBJECT 45 1.0% 16 35.6% 15 897.2 3078.2
KEYWORD 1,131 24.6% 238 21.0% 28 612.2 3834.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 0.2% 2 22.2% 5 24.7 47.2
DATE 40 0.9% 14 35.0% 21 51.9 76.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 86 1.9% 11 12.8% 11 81.5 168.3
EXACT PE 34 0.7% 8 23.5% 5 64.7 241.3
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 14 0.3% 4 28.6% 99 1472.3 2890.9
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 164 3.7% 63 38.4% 5 168.3 971.2
Single 4,259 96.3% 1,317 30.9% 19 628.5 3946.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 61.1%
LONG 1.0%
FIELDS 1.2%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 32.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:32
Average session length (minutes:seconds) 8:14
Longest session recorded (minutes:seconds) 51:03
Average number of searches completed per session 2.2
Retrievals per search - median 9.0
Retrievals per search - average 323.3
Retrievals per search - standard deviation 905.8
Percent of searches completed with 0 results 25.6%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 98 23.9%
DISPLAY (excluding automatic displays) 160 39.0%
HELP 7 1.7%
EXPLAIN 4 1.0%
SET/RESET 25 6.1%
SHOW 1 0.2%
ADD ON (AND, OR, AND NOT) 20 4.9%
LOGON or LOGOFF 64 15.6%
COMMENT 0 0.0%
SAVE 2 0.5%
USE 0 0.0%
OTHER 29 7.1%
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 15 14.6% 5 33.3% 10 19.0 25.5
TITLE WORD 30 29.1% 7 23.3% 12 655.3 1249.7
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 1.0% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 14 13.6% 6 42.9% 18 50.6 85.9
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 37 35.9% 7 18.9% 95 625.3 1305.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 1.0% 0 0.0% 284 284.0 0.0
DATE 2 1.9% 1 50.0% 8 8.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.9% 1 50.0% 5 5.0 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 1 1.0% 0 0.0% 284 284.0 0.0
By number of indexes:
Multiple 5 5.2% 1 20.0% 56 100.8 127.9
Single 92 94.8% 26 28.3% 18 513.9 1163.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 12.6%
SHORT 56.1%
LONG 0.4%
FIELDS 1.5%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 28.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,009
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 37
displays or when any of these paging options is set.
TEXT included with MAIL commands 167
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:32
Average session length (minutes:seconds) 8:43
Longest session recorded (minutes:seconds) 72:48
Average number of searches completed per session 2.7
Retrievals per search - median 1.0
Retrievals per search - average 312.1
Retrievals per search - standard deviation 1988.9
Percent of searches completed with 0 results 31.6%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 603 41.5%
DISPLAY (excluding automatic displays) 312 21.5%
HELP 38 2.6%
EXPLAIN 28 1.9%
SET/RESET 144 9.9%
SHOW 3 0.2%
ADD ON (AND, OR, AND NOT) 44 3.0%
LOGON or LOGOFF 239 16.4%
COMMENT 0 0.0%
SAVE 7 0.5%
USE 0 0.0%
OTHER 36 2.5%
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 95 14.0% 33 34.7% 7 381.4 780.8
TITLE WORD 100 14.7% 35 35.0% 9 146.0 574.3
EXACT TITLE 156 23.0% 53 34.0% 1 3.7 21.7
JOURNAL 4 0.6% 2 50.0% 721 720.5 1007.6
EXACT JOURNAL 26 3.8% 5 19.2% 34 109.3 205.5
SUBJECT 93 13.7% 35 37.6% 21 1130.0 5607.5
EXACT SUBJECT 7 1.0% 3 42.9% 50 217.5 367.3
KEYWORD 123 18.1% 35 28.5% 38 1002.7 2531.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.4% 2 66.7% 17 17.0 0.0
DATE 61 9.0% 12 19.7% 2 43.6 112.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 0.4% 0 0.0% 87 87.0 0.0
EXACT PE 7 1.0% 0 0.0% 19 19.6 21.8
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 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 74 12.4% 17 23.0% 2 69.4 226.9
Single 524 87.6% 181 34.5% 7 543.8 2691.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.5%
SHORT 43.0%
LONG 0.9%
FIELDS 0.7%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 49.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.2%
Ten most frequent errors:
1. First word of command is invalid 36.5%
2. NS command - no next screen 23.4%
3. FIND command with invalid index name 15.4%
4. PS command - no previous screen 4.4%
5. Search term missing from search command 3.4%
6. DISPLAY command contains invalid word 2.1%
7. Valid command at an inappropriate time 2.1%
8. DISPLAY command - no FIND results 1.4%
9. NS of SHOW/EXP command-no next screen 1.1%
10. MAIL command issued w/o email address 0.9%
11. All others 9.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 28.0%
2. LOCATE (ARTICLE DBS) 17.7%
3. FIND 9.5%
4. COMMANDS 7.1%
5. MAGS DATABASE 6.5%
6. INDEXES 6.0%
7. DISPLAYS (IAC DBS) 4.1%
8. Unrecognized term 3.5%
9. MAIL 2.2%
10. ADDON SEARCH 1.6%
11. All others 13.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.4%
2. First word of command is invalid 21.2%
3. FIND command with invalid index name 12.5%
4. FIND command with zero results 6.5%
5. DISPLAY command-complete in one screen 5.1%
6. DISPLAY command-first of >1 screen 4.5%
7. DISPLAY command - middle of >1 screen 3.5%
8. NS command - no next screen 2.8%
9. PS command - no previous screen 2.7%
10. FIND command retrieves >1 book 2.1%
11. All others 13.7%
Ten most frequent SHOW requests:
1. SEARCH 40.2%
2. HISTORY 35.6%
3. GLOSSARY 4.6%
4. IAC NEWS 3.4%
5. SYSTEM NEWS 3.4%
6. MAIL STATUS 3.4%
7. SETTINGS (IAC DBS) 2.3%
8. LIBRARY NEWS 2.3%
9. GLOSSARY A 1.1%
10. UCI NEWS 1.1%
11. All others 2.3%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)