MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/15/01 through 09/21/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 122 207 329
Davis 102 0 102
Irvine 114 0 114
Los Angeles 2 83 85
Riverside 20 9 29
San Diego 14 32 46
San Francisco 25 0 25
Santa Barbara 4 14 18
Santa Cruz 7 5 12
LBL 0 13 13
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 0 25 25
Stanford 2
Other-Network UC n/a 65 65
_______ ______ _____
410 458 870
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 12 48 879
2-4 a.m. 4 14 162
4-6 a.m. 5 10 206
6-8 a.m. 12 18 272
8-10 a.m. 78 163 1,793
10-12 a.m. 155 425 4,638
12-2 p.m. 187 430 4,186
2-4 p.m. 198 534 5,482
4-6 p.m. 132 446 4,667
6-8 p.m. 35 126 2,038
8-10 p.m. 31 67 924
10-12 p.m. 21 49 1,252
__________ __________ __________ _________________
Total: 870 2,330 26,499
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 426 444 870
Davis 259 0 259
Irvine 316 0 316
Los Angeles 5 288 293
Riverside 55 27 82
San Diego 53 105 158
San Francisco 59 0 59
Santa Barbara 13 27 40
Santa Cruz 29 12 41
LBL 0 20 20
LLL 0 19 19
Los Alamos n/a 0 0
Other - UC 2 41 43
Stanford 6
Other-Network UC n/a 124 124
_______ ______ _____
1,217 1,107 2,330
Number of FIND commands by database
MAGS database 2,074
NEWS database 171
COMP database 85
Total number of FIND commands 2,330
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,079 4,059 8,138
Davis 2,854 0 2,854
Irvine 2,859 0 2,859
Los Angeles 230 4,822 5,052
Riverside 713 164 877
San Diego 577 1,097 1,674
San Francisco 885 0 885
Santa Barbara 130 499 629
Santa Cruz 244 112 356
LBL 0 621 621
LLL 0 201 201
Los Alamos n/a 0 0
Other - UC 0 1,008 1,008
Stanford 7
Other-Network UC n/a 1,322 1,322
_______ ______ _____
12,571 13,905 26,483
Number of Records Displayed by database:
MAGS database 24,923
NEWS database 883
COMP database 693
Total number of Records Displayed 26,483
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 9.8%
Percent of COMP sessions 3.9%
Percent of searches done in the MAGS database 89.0%
Percent of searches done in the NEWS database 7.3%
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 0.7
Standard deviation in seconds 5.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:42
Average session length (minutes:seconds) 12:59
Longest session recorded (minutes:seconds) 241:35
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 450.5
Retrievals per search - standard deviation 2872.2
Percent of searches completed with 0 results 30.0%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 37.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,935 29.6%
DISPLAY (excluding automatic displays) 2,487 38.1%
HELP 174 2.7%
EXPLAIN 141 2.2%
SET/RESET 343 5.3%
SHOW 20 0.3%
ADD ON (AND, OR, AND NOT) 139 2.1%
LOGON or LOGOFF 884 13.5%
COMMENT 0 0.0%
SAVE 118 1.8%
USE 2 0.0%
OTHER 289 4.4%
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 397 19.7% 97 24.4% 12 54.9 171.1
TITLE WORD 493 24.5% 163 33.1% 16 413.2 2339.8
EXACT TITLE 97 4.8% 53 54.6% 1 182.3 861.8
JOURNAL 97 4.8% 41 42.3% 1,125 7022.9 11261.8
EXACT JOURNAL 78 3.9% 36 46.2% 935 4963.4 9991.9
SUBJECT 317 15.7% 121 38.2% 21 173.5 554.5
EXACT SUBJECT 20 1.0% 6 30.0% 8 513.4 1330.5
KEYWORD 404 20.1% 74 18.3% 63 338.6 1204.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.3% 1 14.3% 4 7.7 8.2
DATE 33 1.6% 8 24.2% 7 41.2 108.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 41 2.0% 4 9.8% 6 135.0 621.4
EXACT PE 29 1.4% 7 24.1% 10 23.6 56.4
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 1 0.0% 0 0.0% 135 135.0 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 90 4.7% 31 34.4% 6 181.5 829.2
Single 1,832 95.3% 548 29.9% 18 701.6 3604.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 59.5%
LONG 1.6%
FIELDS 1.4%
PERIODICALS 2.1%
COMMENTS 0.0%
Other 32.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:52
Average session length (minutes:seconds) 5:13
Longest session recorded (minutes:seconds) 22:00
Average number of searches completed per session 2.5
Retrievals per search - median 3.0
Retrievals per search - average 267.2
Retrievals per search - standard deviation 1422.6
Percent of searches completed with 0 results 34.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 77 28.7%
DISPLAY (excluding automatic displays) 93 34.7%
HELP 4 1.5%
EXPLAIN 8 3.0%
SET/RESET 13 4.9%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 8 3.0%
LOGON or LOGOFF 44 16.4%
COMMENT 0 0.0%
SAVE 2 0.7%
USE 0 0.0%
OTHER 18 6.7%
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 17 21.0% 9 52.9% 4 9.5 13.1
TITLE WORD 18 22.2% 2 11.1% 9 809.9 3129.7
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 2.5% 1 50.0% 7 7.0 0.0
EXACT JOURNAL 1 1.2% 0 0.0% 3,373 3373.0 0.0
SUBJECT 11 13.6% 3 27.3% 135 247.1 268.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 29 35.8% 10 34.5% 19 225.4 543.2
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 3 3.7% 1 33.3% 1,703 1703.0 2361.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 4 5.2% 1 25.0% 33 1135.7 1937.7
Single 73 94.8% 24 32.9% 18 393.2 1809.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.7%
SHORT 55.1%
LONG 0.6%
FIELDS 3.8%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 34.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 530
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 33
displays or when any of these paging options is set.
TEXT included with MAIL commands 84
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:27
Average session length (minutes:seconds) 10:03
Longest session recorded (minutes:seconds) 92:31
Average number of searches completed per session 2.0
Retrievals per search - median 1.0
Retrievals per search - average 307.3
Retrievals per search - standard deviation 1688.9
Percent of searches completed with 0 results 30.6%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 161 32.8%
DISPLAY (excluding automatic displays) 128 26.1%
HELP 19 3.9%
EXPLAIN 19 3.9%
SET/RESET 48 9.8%
SHOW 4 0.8%
ADD ON (AND, OR, AND NOT) 10 2.0%
LOGON or LOGOFF 86 17.5%
COMMENT 0 0.0%
SAVE 3 0.6%
USE 0 0.0%
OTHER 13 2.6%
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 21 12.1% 9 42.9% 6 31.3 58.2
TITLE WORD 65 37.4% 20 30.8% 8 107.3 305.5
EXACT TITLE 21 12.1% 7 33.3% 1 1.1 0.3
JOURNAL 4 2.3% 1 25.0% 441 733.7 819.2
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 13 7.5% 6 46.2% 114 1046.9 2161.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 36 20.7% 6 16.7% 15 915.0 3689.3
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 7 4.0% 0 0.0% 19 427.4 696.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 2.3% 1 25.0% 17 36.7 43.0
EXACT PE 1 0.6% 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 2 1.1% 2 100% 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 13 8.1% 2 15.4% 14 312.6 575.4
Single 147 91.9% 49 33.3% 8 391.0 2138.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
SHORT 50.9%
LONG 0.4%
FIELDS 1.4%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 43.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.9%
Ten most frequent errors:
1. First word of command is invalid 36.7%
2. NS command - no next screen 25.1%
3. FIND command with invalid index name 12.2%
4. PS command - no previous screen 4.6%
5. DISPLAY command contains invalid word 2.5%
6. Search term missing from search command 2.1%
7. Valid command at an inappropriate time 1.7%
8. NS of SHOW/EXP command-no next screen 1.1%
9. DISPLAY command - no FIND results 1.0%
10. Command contains escape or arrow key 0.9%
11. All others 12.1%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 22.6%
2. GUIDE 20.2%
3. INDEXES 10.1%
4. FIND 7.1%
5. MAGS DATABASE 6.0%
6. A031 6.0%
7. COMMANDS 5.4%
8. MAIL 3.6%
9. ADDON SEARCH 3.0%
10. Unrecognized term-reminders off 2.4%
11. All others 13.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.8%
2. First word of command is invalid 19.5%
3. DISPLAY command-first of >1 screen 9.3%
4. FIND command with invalid index name 9.0%
5. DISPLAY command-complete in one screen 6.0%
6. FIND command with zero results 4.9%
7. FIND command retrieves >1 book 4.7%
8. DISPLAY command - middle of >1 screen 4.4%
9. NS command - no next screen 1.9%
10. FIND command retrieves 1 book 1.9%
11. All others 14.5%
Ten most frequent SHOW requests:
1. HISTORY 45.8%
2. SEARCH 12.5%
3. IAC NEWS 8.3%
4. LIBRARY LOCATIONS 8.3%
5. MAIL STATUS 8.3%
6. Z39.50 NEWS 4.2%
7. GLOSSARY 4.2%
8. SYSTEM NEWS 4.2%
9. LIBRARY NEWS 4.2%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)