MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/18/02 through 05/24/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 34 111 145
Davis 84 0 84
Irvine 48 0 48
Los Angeles 0 40 40
Riverside 12 10 22
San Diego 20 4 24
San Francisco 2 0 2
Santa Barbara 6 19 25
Santa Cruz 8 12 20
LBL 0 3 3
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 1 15 16
Stanford 0
Other-Network UC n/a 21 21
_______ ______ _____
215 235 450
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 1 0 0
2-4 a.m. 0 0 0
4-6 a.m. 1 6 128
6-8 a.m. 5 7 27
8-10 a.m. 42 110 564
10-12 a.m. 86 253 3,030
12-2 p.m. 73 184 1,689
2-4 p.m. 78 195 1,888
4-6 p.m. 78 210 2,269
6-8 p.m. 44 110 1,572
8-10 p.m. 31 72 769
10-12 p.m. 11 43 307
__________ __________ __________ _________________
Total: 450 1,190 12,243
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 91 316 407
Davis 128 0 128
Irvine 166 0 166
Los Angeles 0 109 109
Riverside 26 25 51
San Diego 40 4 44
San Francisco 7 0 7
Santa Barbara 17 46 63
Santa Cruz 27 45 72
LBL 0 6 6
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 2 40 42
Stanford 0
Other-Network UC n/a 95 95
_______ ______ _____
504 686 1,190
Number of FIND commands by database
MAGS database 1,035
NEWS database 96
COMP database 59
Total number of FIND commands 1,190
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 874 3,704 4,578
Davis 1,118 0 1,118
Irvine 962 0 962
Los Angeles 0 1,715 1,715
Riverside 189 191 380
San Diego 216 257 473
San Francisco 131 0 131
Santa Barbara 226 270 496
Santa Cruz 121 604 725
LBL 0 142 142
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 5 221 226
Stanford 0
Other-Network UC n/a 1,297 1,297
_______ ______ _____
3,842 8,401 12,243
Number of Records Displayed by database:
MAGS database 11,309
NEWS database 628
COMP database 306
Total number of Records Displayed 12,243
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.6%
Percent of NEWS sessions 8.7%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 87.0%
Percent of searches done in the NEWS database 8.1%
Percent of searches done in the COMP database 5.0%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.4
Standard deviation in seconds 2.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:27
Average session length (minutes:seconds) 14:58
Longest session recorded (minutes:seconds) 321:56
Average number of searches completed per session 2.6
Retrievals per search - median 4.0
Retrievals per search - average 456.8
Retrievals per search - standard deviation 3785.0
Percent of searches completed with 0 results 32.8%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 33.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,003 29.5%
DISPLAY (excluding automatic displays) 1,243 36.5%
HELP 92 2.7%
EXPLAIN 74 2.2%
SET/RESET 150 4.4%
SHOW 11 0.3%
ADD ON (AND, OR, AND NOT) 32 0.9%
LOGON or LOGOFF 529 15.5%
COMMENT 0 0.0%
SAVE 47 1.4%
USE 0 0.0%
OTHER 221 6.5%
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 176 17.0% 48 27.3% 11 59.3 163.3
TITLE WORD 290 28.0% 92 31.7% 15 248.9 1005.9
EXACT TITLE 44 4.2% 24 54.5% 6 13.3 18.8
JOURNAL 39 3.8% 14 35.9% 1,883 5026.0 8777.6
EXACT JOURNAL 49 4.7% 21 42.9% 1,987 4251.1 6294.7
SUBJECT 189 18.2% 80 42.3% 33 200.0 520.3
EXACT SUBJECT 11 1.1% 3 27.3% 36 2426.6 6661.2
KEYWORD 201 19.4% 43 21.4% 22 797.0 8057.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 156 156.0 0.0
DATE 4 0.4% 1 25.0% 94 107.3 102.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 12 1.2% 4 33.3% 4 47.3 100.0
EXACT PE 6 0.6% 0 0.0% 4 7.5 8.7
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 14 1.4% 7 50.0% 387 491.4 439.6
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 3.7% 12 32.4% 22 133.0 284.8
Single 962 96.3% 313 32.5% 20 719.0 4749.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 56.4%
LONG 6.1%
FIELDS 1.3%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 32.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:53
Average session length (minutes:seconds) 16:53
Longest session recorded (minutes:seconds) 124:44
Average number of searches completed per session 3.3
Retrievals per search - median 0.0
Retrievals per search - average 209.8
Retrievals per search - standard deviation 585.6
Percent of searches completed with 0 results 53.6%
Percent of searches entered that are long 5.1%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 54 37.5%
DISPLAY (excluding automatic displays) 26 18.1%
HELP 8 5.6%
EXPLAIN 12 8.3%
SET/RESET 6 4.2%
SHOW 2 1.4%
ADD ON (AND, OR, AND NOT) 5 3.5%
LOGON or LOGOFF 23 16.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 8 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 5 9.6% 1 20.0% 169 168.3 192.5
TITLE WORD 7 13.5% 6 85.7% 22 22.0 0.0
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 3 5.8% 1 33.3% 800 800.0 0.0
EXACT JOURNAL 1 1.9% 0 0.0% 2,990 2990.0 0.0
SUBJECT 21 40.4% 18 85.7% 3 22.0 34.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 13 25.0% 3 23.1% 433 610.1 888.7
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.9% 0 0.0% 59 59.0 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 1.9% 0 0.0% 247 247.0 0.0
By number of indexes:
Multiple 1 2.0% 0 0.0% 247 247.0 0.0
Single 50 98.0% 29 58.0% 335 536.4 871.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 54.5%
LONG 0.0%
FIELDS 1.8%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 41.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 266
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 4
displays or when any of these paging options is set.
TEXT included with MAIL commands 65
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:39
Average session length (minutes:seconds) 6:30
Longest session recorded (minutes:seconds) 34:54
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 149.1
Retrievals per search - standard deviation 484.1
Percent of searches completed with 0 results 41.1%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 92 36.1%
DISPLAY (excluding automatic displays) 51 20.0%
HELP 16 6.3%
EXPLAIN 6 2.4%
SET/RESET 13 5.1%
SHOW 3 1.2%
ADD ON (AND, OR, AND NOT) 4 1.6%
LOGON or LOGOFF 59 23.1%
COMMENT 0 0.0%
SAVE 1 0.4%
USE 0 0.0%
OTHER 10 3.9%
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 10.9% 4 40.0% 41 332.2 479.7
TITLE WORD 23 25.0% 7 30.4% 17 20.1 16.9
EXACT TITLE 4 4.3% 1 25.0% 11 14.3 15.3
JOURNAL 2 2.2% 2 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 20 21.7% 12 60.0% 30 174.5 297.9
EXACT SUBJECT 4 4.3% 3 75.0% 27 27.0 0.0
KEYWORD 15 16.3% 5 33.3% 5 305.2 614.9
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 3 3.3% 0 0.0% 2,388 2388.0 0.0
PERIODICAL 11 12.0% 4 36.4% 8 16.9 13.9
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 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 1 1.1% 1 100% 0 0.0 0.0
Single 90 98.9% 36 40.0% 24 261.4 621.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 33.0%
LONG 2.6%
FIELDS 0.0%
PERIODICALS 13.9%
COMMENTS 0.0%
Other 47.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.3%
Ten most frequent errors:
1. First word of command is invalid 33.0%
2. NS command - no next screen 22.7%
3. FIND command with invalid index name 16.8%
4. PS command - no previous screen 4.6%
5. DISPLAY command contains invalid word 4.5%
6. Valid command at an inappropriate time 3.4%
7. Search term missing from search command 2.6%
8. NS of SHOW/EXP command-no next screen 2.1%
9. DISPLAY command - no FIND results 1.7%
10. Command contains escape or arrow key 1.2%
11. All others 7.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.8%
2. LOCATE (ARTICLE DBS) 20.7%
3. FIND 8.7%
4. INDEXES 7.6%
5. Unrecognized term 7.6%
6. MAGS DATABASE 6.5%
7. COMMANDS 6.5%
8. LOCATIONS 3.3%
9. DATABASES 3.3%
10. ADDON SEARCH 2.2%
11. All others 10.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.0%
2. First word of command is invalid 20.2%
3. FIND command with invalid index name 12.0%
4. FIND command with zero results 8.2%
5. DISPLAY command - middle of >1 screen 7.2%
6. DISPLAY command-first of >1 screen 5.3%
7. DISPLAY command-complete in one screen 4.3%
8. Valid command at an inappropriate time 1.9%
9. NS command - no next screen 1.9%
10. DISPLAY command - last of >1 screen 1.9%
11. All others 11.1%
Ten most frequent SHOW requests:
1. IAC NEWS 53.3%
2. HISTORY 20.0%
3. SYSTEM NEWS 13.3%
4. SEARCH 13.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)