MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/28/01 through 05/04/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 212 395 607
Davis 181 2 183
Irvine 152 0 152
Los Angeles 3 157 160
Riverside 33 12 45
San Diego 23 61 84
San Francisco 53 0 53
Santa Barbara 20 29 49
Santa Cruz 71 68 139
LBL 0 8 8
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 3 72 75
Stanford 58
Other-Network UC n/a 164 164
_______ ______ _____
751 968 1,777
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 28 88 984
2-4 a.m. 8 16 136
4-6 a.m. 9 16 197
6-8 a.m. 27 93 1,175
8-10 a.m. 116 278 2,621
10-12 a.m. 256 696 5,867
12-2 p.m. 301 848 11,085
2-4 p.m. 377 1,017 9,076
4-6 p.m. 308 673 6,061
6-8 p.m. 136 418 4,070
8-10 p.m. 148 403 4,163
10-12 p.m. 63 144 960
__________ __________ __________ _________________
Total: 1,777 4,690 46,395
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 708 972 1,680
Davis 446 13 459
Irvine 343 0 343
Los Angeles 13 352 365
Riverside 82 21 103
San Diego 39 174 213
San Francisco 139 0 139
Santa Barbara 67 68 135
Santa Cruz 176 134 310
LBL 0 19 19
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 7 203 210
Stanford 149
Other-Network UC n/a 565 565
_______ ______ _____
2,020 2,521 4,690
Number of FIND commands by database
MAGS database 4,181
NEWS database 431
COMP database 78
Total number of FIND commands 4,690
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 6,570 9,845 16,415
Davis 3,956 12 3,968
Irvine 2,809 0 2,809
Los Angeles 69 4,241 4,310
Riverside 731 457 1,188
San Diego 250 963 1,213
San Francisco 1,247 0 1,247
Santa Barbara 662 217 879
Santa Cruz 1,148 1,022 2,170
LBL 0 86 86
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 12 3,967 3,979
Stanford 208
Other-Network UC n/a 6,696 6,696
_______ ______ _____
17,454 27,506 45,168
Number of Records Displayed by database:
MAGS database 42,657
NEWS database 3,041
COMP database 697
Total number of Records Displayed 45,168
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.7%
Percent of NEWS sessions 10.1%
Percent of COMP sessions 2.2%
Percent of searches done in the MAGS database 89.1%
Percent of searches done in the NEWS database 9.2%
Percent of searches done in the COMP database 1.7%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 5.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:03
Average session length (minutes:seconds) 9:56
Longest session recorded (minutes:seconds) 340:14
Average number of searches completed per session 2.7
Retrievals per search - median 4.0
Retrievals per search - average 431.4
Retrievals per search - standard deviation 3261.1
Percent of searches completed with 0 results 32.0%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 58.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,910 29.0%
DISPLAY (excluding automatic displays) 4,744 35.1%
HELP 505 3.7%
EXPLAIN 345 2.6%
SET/RESET 526 3.9%
SHOW 62 0.5%
ADD ON (AND, OR, AND NOT) 271 2.0%
LOGON or LOGOFF 2,139 15.8%
COMMENT 0 0.0%
SAVE 250 1.9%
USE 3 0.0%
OTHER 745 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 747 18.4% 237 31.7% 9 44.4 141.0
TITLE WORD 874 21.6% 252 28.8% 12 365.2 2743.5
EXACT TITLE 142 3.5% 77 54.2% 2 18.6 81.9
JOURNAL 208 5.1% 81 38.9% 987 5230.3 13510.2
EXACT JOURNAL 73 1.8% 45 61.6% 717 3011.5 4644.6
SUBJECT 1,046 25.8% 416 39.8% 20 261.2 1241.5
EXACT SUBJECT 34 0.8% 12 35.3% 65 261.1 519.7
KEYWORD 772 19.0% 149 19.3% 26 831.4 4187.5
SUBFILE 3 0.1% 0 0.0% 3 5.0 3.5
PUBLICATION TYPE 7 0.2% 2 28.6% 33 76.6 109.2
DATE 27 0.7% 5 18.5% 13 89.2 225.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 57 1.4% 2 3.5% 7 194.3 421.8
EXACT PE 16 0.4% 4 25.0% 9 138.5 286.3
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 47 1.2% 6 12.8% 2,779 3720.4 4809.5
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 171 4.4% 35 20.5% 9 1140.8 3123.4
Single 3,709 95.6% 1,217 32.8% 17 619.8 4106.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 61.0%
LONG 1.8%
FIELDS 1.2%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 32.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 9:11
Average session length (minutes:seconds) 11:27
Longest session recorded (minutes:seconds) 59:06
Average number of searches completed per session 2.0
Retrievals per search - median 1.0
Retrievals per search - average 227.6
Retrievals per search - standard deviation 1143.2
Percent of searches completed with 0 results 41.0%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 72 24.7%
DISPLAY (excluding automatic displays) 96 32.9%
HELP 12 4.1%
EXPLAIN 17 5.8%
SET/RESET 15 5.1%
SHOW 3 1.0%
ADD ON (AND, OR, AND NOT) 6 2.1%
LOGON or LOGOFF 53 18.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 18 6.2%
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 7 8.7% 4 57.1% 2 2.0 1.0
TITLE WORD 32 40.0% 12 37.5% 12 45.3 72.8
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 7 8.7% 7 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 11 13.7% 5 45.5% 106 228.7 312.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 16 20.0% 2 12.5% 69 1067.9 2596.5
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 4 5.0% 0 0.0% 35 2414.0 4780.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 3.7% 3 100% 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 8 11.1% 2 25.0% 7 1609.8 3906.6
Single 64 88.9% 29 45.3% 39 216.3 570.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 62.8%
LONG 2.4%
FIELDS 1.8%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 28.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 886
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 34
displays or when any of these paging options is set.
TEXT included with MAIL commands 235
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:26
Average session length (minutes:seconds) 11:36
Longest session recorded (minutes:seconds) 402:14
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 168.3
Retrievals per search - standard deviation 850.8
Percent of searches completed with 0 results 39.5%
Percent of searches entered that are long 2.6%
Percent of long searches completed
(includes partial results) 63.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 401 32.6%
DISPLAY (excluding automatic displays) 319 25.9%
HELP 51 4.1%
EXPLAIN 53 4.3%
SET/RESET 62 5.0%
SHOW 6 0.5%
ADD ON (AND, OR, AND NOT) 30 2.4%
LOGON or LOGOFF 248 20.2%
COMMENT 0 0.0%
SAVE 5 0.4%
USE 0 0.0%
OTHER 55 4.5%
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 42 10.0% 13 30.9% 62 477.4 812.8
TITLE WORD 109 25.8% 43 39.4% 12 60.0 139.9
EXACT TITLE 11 2.6% 8 72.7% 2 58.7 99.0
JOURNAL 7 1.7% 1 14.3% 215 2604.8 3783.2
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 146 34.6% 73 50.0% 30 426.3 1502.5
EXACT SUBJECT 2 0.5% 1 50.0% 1 1.0 0.0
KEYWORD 89 21.1% 25 28.1% 14 104.2 236.6
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 10 2.4% 4 40.0% 17 2502.3 3861.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 0.7% 2 66.7% 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 3 0.7% 1 33.3% 6 6.0 2.8
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 23 5.8% 8 34.8% 8 1045.3 2617.0
Single 374 94.2% 155 41.4% 16 251.4 940.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 52.2%
LONG 3.2%
FIELDS 1.8%
PERIODICALS 0.3%
COMMENTS 0.0%
Other 40.3%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.1%
Ten most frequent errors:
1. First word of command is invalid 39.2%
2. NS command - no next screen 20.4%
3. FIND command with invalid index name 16.0%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 2.6%
6. Valid command at an inappropriate time 2.5%
7. Search term missing from search command 2.1%
8. DISPLAY command - no FIND results 1.2%
9. NS of SHOW/EXP command-no next screen 1.1%
10. MAIL command issued w/o email address 1.1%
11. All others 9.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.2%
2. LOCATE (ARTICLE DBS) 26.3%
3. FIND 7.5%
4. COMMANDS 6.0%
5. Unrecognized term 4.8%
6. INDEXES 4.1%
7. MAGS DATABASE 3.1%
8. DISPLAYS (IAC DBS) 2.7%
9. ADDON SEARCH 2.7%
10. DATABASES 2.4%
11. All others 13.3%
Ten most frequent HELP situations:
1. First word of command is invalid 23.1%
2. Help requested from SET DB command 22.7%
3. FIND command with invalid index name 12.2%
4. DISPLAY command-first of >1 screen 6.5%
5. FIND command with zero results 5.2%
6. DISPLAY command - middle of >1 screen 4.8%
7. DISPLAY command-complete in one screen 4.4%
8. FIND command retrieves >1 book 2.7%
9. NS command - no next screen 2.2%
10. PS command - no previous screen 1.7%
11. All others 14.4%
Ten most frequent SHOW requests:
1. SEARCH 52.1%
2. HISTORY 23.9%
3. SETTINGS (IAC DBS) 5.6%
4. GLOSSARY 5.6%
5. SYSTEM NEWS 4.2%
6. IAC NEWS 2.8%
7. SYSTEM3 NEWS 1.4%
8. LIBRARY NEWS 1.4%
9. TIME 1.4%
10. MAIL STATUS 1.4%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)