MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/01/01 through 12/07/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 126 241 367
Davis 175 1 176
Irvine 69 0 69
Los Angeles 1 76 77
Riverside 39 13 52
San Diego 14 25 39
San Francisco 32 0 32
Santa Barbara 5 25 30
Santa Cruz 5 32 37
LBL 0 4 4
LLL 0 4 4
Los Alamos n/a 2 2
Other - UC 1 45 46
Stanford 16
Other-Network UC n/a 53 53
_______ ______ _____
467 521 1,004
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 20 48 727
2-4 a.m. 9 25 302
4-6 a.m. 8 16 228
6-8 a.m. 19 54 751
8-10 a.m. 79 177 1,893
10-12 a.m. 157 380 4,190
12-2 p.m. 174 509 4,259
2-4 p.m. 200 533 6,189
4-6 p.m. 148 334 4,287
6-8 p.m. 82 183 1,846
8-10 p.m. 65 275 2,713
10-12 p.m. 43 127 1,217
__________ __________ __________ _________________
Total: 1,004 2,661 28,602
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 358 605 963
Davis 487 3 490
Irvine 195 0 195
Los Angeles 1 213 214
Riverside 75 31 106
San Diego 15 85 100
San Francisco 70 0 70
Santa Barbara 11 54 65
Santa Cruz 21 70 91
LBL 0 5 5
LLL 0 9 9
Los Alamos n/a 5 5
Other - UC 2 169 171
Stanford 47
Other-Network UC n/a 130 130
_______ ______ _____
1,235 1,379 2,661
Number of FIND commands by database
MAGS database 2,409
NEWS database 164
COMP database 88
Total number of FIND commands 2,661
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,378 5,354 9,732
Davis 4,397 8 4,405
Irvine 1,248 0 1,248
Los Angeles 192 3,141 3,333
Riverside 551 303 854
San Diego 121 203 324
San Francisco 998 0 998
Santa Barbara 133 2,971 3,104
Santa Cruz 69 821 890
LBL 0 67 67
LLL 0 239 239
Los Alamos n/a 55 55
Other - UC 45 1,880 1,925
Stanford 47
Other-Network UC n/a 1,096 1,096
_______ ______ _____
12,132 16,138 28,317
Number of Records Displayed by database:
MAGS database 25,661
NEWS database 1,920
COMP database 1,021
Total number of Records Displayed 28,317
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.0%
Percent of NEWS sessions 8.8%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 90.5%
Percent of searches done in the NEWS database 6.2%
Percent of searches done in the COMP database 3.3%
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 4.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:12
Average session length (minutes:seconds) 11:35
Longest session recorded (minutes:seconds) 424:30
Average number of searches completed per session 2.7
Retrievals per search - median 6.0
Retrievals per search - average 665.2
Retrievals per search - standard deviation 6574.2
Percent of searches completed with 0 results 30.3%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 65.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,241 28.7%
DISPLAY (excluding automatic displays) 2,756 35.3%
HELP 319 4.1%
EXPLAIN 206 2.6%
SET/RESET 312 4.0%
SHOW 43 0.6%
ADD ON (AND, OR, AND NOT) 168 2.1%
LOGON or LOGOFF 1,214 15.5%
COMMENT 0 0.0%
SAVE 162 2.1%
USE 2 0.0%
OTHER 391 5.0%
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 428 18.4% 114 26.6% 10 68.0 305.7
TITLE WORD 509 21.9% 166 32.6% 10 335.3 2320.8
EXACT TITLE 79 3.4% 38 48.1% 5 154.5 904.6
JOURNAL 123 5.3% 49 39.8% 1,347 5079.5 10078.0
EXACT JOURNAL 30 1.3% 12 40.0% 4,242 6529.1 10689.1
SUBJECT 500 21.5% 208 41.6% 57 351.2 1023.9
EXACT SUBJECT 20 0.9% 4 20.0% 66 810.2 1305.5
KEYWORD 513 22.1% 94 18.3% 26 1314.4 7746.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.3% 0 0.0% 12 19.6 23.4
DATE 27 1.2% 3 11.1% 12 39.6 63.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 42 1.8% 3 7.1% 20 150.9 588.1
EXACT PE 25 1.1% 2 8.0% 3 11.3 18.9
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 18 0.8% 7 38.9% 21 124.5 288.9
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 90 4.0% 22 24.4% 7 46.8 158.5
Single 2,137 96.0% 656 30.7% 23 880.8 5135.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 60.0%
LONG 2.2%
FIELDS 0.7%
PERIODICALS 2.0%
COMMENTS 0.0%
Other 33.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:58
Average session length (minutes:seconds) 8:11
Longest session recorded (minutes:seconds) 66:42
Average number of searches completed per session 2.7
Retrievals per search - median 11.0
Retrievals per search - average 1008.0
Retrievals per search - standard deviation 5471.1
Percent of searches completed with 0 results 36.0%
Percent of searches entered that are long 8.0%
Percent of long searches completed
(includes partial results) 71.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 80 24.4%
DISPLAY (excluding automatic displays) 118 36.0%
HELP 17 5.2%
EXPLAIN 23 7.0%
SET/RESET 7 2.1%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 8 2.4%
LOGON or LOGOFF 53 16.2%
COMMENT 0 0.0%
SAVE 2 0.6%
USE 1 0.3%
OTHER 18 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 6 7.5% 2 33.3% 147 454.0 705.4
TITLE WORD 11 13.7% 6 54.5% 22 845.6 1827.9
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 6 7.5% 4 66.7% 28,507 28506.5 29982.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 27 33.7% 11 40.7% 28 122.8 191.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 25 31.3% 6 24.0% 118 1078.8 1896.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 1.2% 0 0.0% 118 118.0 0.0
DATE 1 1.2% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 2.5% 1 50.0% 2 2.0 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 1.2% 0 0.0% 146 146.0 0.0
By number of indexes:
Multiple 2 2.6% 1 50.0% 118 118.0 0.0
Single 76 97.4% 29 38.2% 75 1820.2 7335.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.5%
SHORT 60.8%
LONG 0.6%
FIELDS 1.7%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 27.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 532
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 22
displays or when any of these paging options is set.
TEXT included with MAIL commands 101
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:12
Average session length (minutes:seconds) 7:57
Longest session recorded (minutes:seconds) 114:10
Average number of searches completed per session 1.9
Retrievals per search - median 5.0
Retrievals per search - average 217.6
Retrievals per search - standard deviation 1055.1
Percent of searches completed with 0 results 30.7%
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 154 28.2%
DISPLAY (excluding automatic displays) 125 22.9%
HELP 31 5.7%
EXPLAIN 21 3.8%
SET/RESET 39 7.1%
SHOW 5 0.9%
ADD ON (AND, OR, AND NOT) 10 1.8%
LOGON or LOGOFF 110 20.1%
COMMENT 0 0.0%
SAVE 5 0.9%
USE 0 0.0%
OTHER 47 8.6%
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 18 8.3% 5 27.8% 360 573.2 644.0
TITLE WORD 61 28.0% 13 21.3% 10 127.4 403.2
EXACT TITLE 3 1.4% 2 66.7% 196 196.0 0.0
JOURNAL 2 0.9% 0 0.0% 6,256 6255.5 8650.0
EXACT JOURNAL 29 13.3% 2 6.9% 9 16.4 39.9
SUBJECT 30 13.8% 16 53.3% 56 493.0 999.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 39 17.9% 11 28.2% 11 73.3 165.0
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 34 15.6% 3 8.8% 9 65.7 231.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.5% 0 0.0% 86 86.0 0.0
EXACT PE 1 0.5% 0 0.0% 49 49.0 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 37 24.2% 4 10.8% 9 72.5 225.9
Single 116 75.8% 42 36.2% 27 443.6 1533.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 39.1%
LONG 3.2%
FIELDS 0.9%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 52.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.4%
Ten most frequent errors:
1. First word of command is invalid 37.4%
2. NS command - no next screen 22.3%
3. FIND command with invalid index name 13.6%
4. PS command - no previous screen 4.1%
5. Valid command at an inappropriate time 2.7%
6. Search term missing from search command 2.6%
7. DISPLAY command contains invalid word 1.9%
8. DISPLAY command - no FIND results 1.0%
9. NS of SHOW/EXP command-no next screen 1.0%
10. 790 1.0%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 24.0%
2. LOCATE (ARTICLE DBS) 18.8%
3. INDEXES 10.8%
4. COMMANDS 8.4%
5. FIND 8.0%
6. Unrecognized term 7.6%
7. MAGS DATABASE 4.0%
8. ADDON SEARCH 2.8%
9. LOCATE (PE DB) 1.6%
10. DATES 1.2%
11. All others 12.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.0%
2. First word of command is invalid 20.6%
3. FIND command with invalid index name 11.5%
4. FIND command with zero results 6.0%
5. DISPLAY command-complete in one screen 4.7%
6. DISPLAY command-first of >1 screen 4.5%
7. DISPLAY command - middle of >1 screen 4.5%
8. FIND command retrieves >1 book 2.6%
9. NS command - no next screen 2.4%
10. PS command - no previous screen 1.9%
11. All others 16.2%
Ten most frequent SHOW requests:
1. HISTORY 38.8%
2. IAC NEWS 22.4%
3. SEARCH 16.3%
4. SETTINGS (IAC DBS) 4.1%
5. MAIL SETTINGS 4.1%
6. DATABASES 4.1%
7. STANFORD UNIVERSITY PASSWORDS 2.0%
8. UCB LIBRARY HOURS 2.0%
9. GLOSSARY 2.0%
10. SYSTEM NEWS 2.0%
11. All others 2.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)