MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/06/02 through 04/12/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 110 224 334
Davis 79 1 80
Irvine 63 0 63
Los Angeles 0 46 46
Riverside 2 9 11
San Diego 19 23 42
San Francisco 9 0 9
Santa Barbara 4 13 17
Santa Cruz 8 22 30
LBL 0 7 7
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 0 36 36
Stanford 0
Other-Network UC n/a 87 87
_______ ______ _____
294 470 764
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 8 14 43
2-4 a.m. 6 37 666
4-6 a.m. 4 15 21
6-8 a.m. 9 36 324
8-10 a.m. 96 203 1,969
10-12 a.m. 153 382 3,090
12-2 p.m. 126 228 2,941
2-4 p.m. 136 309 4,274
4-6 p.m. 86 199 1,823
6-8 p.m. 53 138 2,793
8-10 p.m. 47 110 1,305
10-12 p.m. 40 88 678
__________ __________ __________ _________________
Total: 764 1,759 19,927
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 250 598 848
Davis 152 2 154
Irvine 136 0 136
Los Angeles 0 78 78
Riverside 9 29 38
San Diego 37 56 93
San Francisco 11 0 11
Santa Barbara 6 38 44
Santa Cruz 20 43 63
LBL 0 11 11
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 0 86 86
Stanford 0
Other-Network UC n/a 194 194
_______ ______ _____
621 1,138 1,759
Number of FIND commands by database
MAGS database 1,520
NEWS database 164
COMP database 75
Total number of FIND commands 1,759
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,030 7,010 10,040
Davis 1,276 11 1,287
Irvine 927 0 927
Los Angeles 0 829 829
Riverside 22 255 277
San Diego 651 1,718 2,369
San Francisco 4 0 4
Santa Barbara 25 145 170
Santa Cruz 36 554 590
LBL 0 52 52
LLL 0 28 28
Los Alamos n/a 0 0
Other - UC 0 845 845
Stanford 0
Other-Network UC n/a 2,509 2,509
_______ ______ _____
5,971 13,956 19,927
Number of Records Displayed by database:
MAGS database 16,586
NEWS database 1,541
COMP database 1,800
Total number of Records Displayed 19,927
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 10.2%
Percent of COMP sessions 3.5%
Percent of searches done in the MAGS database 86.4%
Percent of searches done in the NEWS database 9.3%
Percent of searches done in the COMP database 4.3%
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 1.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.2
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 4:50
Average session length (minutes:seconds) 10:31
Longest session recorded (minutes:seconds) 145:57
Average number of searches completed per session 2.3
Retrievals per search - median 5.0
Retrievals per search - average 785.1
Retrievals per search - standard deviation 18081
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) 42.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,449 26.7%
DISPLAY (excluding automatic displays) 2,125 39.2%
HELP 197 3.6%
EXPLAIN 106 2.0%
SET/RESET 267 4.9%
SHOW 29 0.5%
ADD ON (AND, OR, AND NOT) 71 1.3%
LOGON or LOGOFF 854 15.8%
COMMENT 0 0.0%
SAVE 49 0.9%
USE 1 0.0%
OTHER 274 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 284 19.2% 84 29.6% 8 39.7 125.3
TITLE WORD 411 27.8% 154 37.5% 9 2843.5 43288.3
EXACT TITLE 35 2.4% 17 48.6% 12 753.4 1848.2
JOURNAL 67 4.5% 34 50.7% 1,001 3816.0 9340.7
EXACT JOURNAL 36 2.4% 15 41.7% 418 5411.1 11647.7
SUBJECT 334 22.6% 90 26.9% 38 265.8 711.9
EXACT SUBJECT 10 0.7% 1 10.0% 12 30.2 56.9
KEYWORD 222 15.0% 41 18.5% 24 647.9 5230.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.3% 1 25.0% 17 944.3 1619.2
DATE 7 0.5% 3 42.9% 8 45.5 79.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 36 2.4% 1 2.8% 4 80.9 270.6
EXACT PE 22 1.5% 0 0.0% 2 3.2 2.7
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 10 0.7% 0 0.0% 9 68.6 101.3
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 36 2.5% 11 30.6% 10 211.5 624.6
Single 1,405 97.5% 418 29.8% 14 1185.7 22342.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 62.7%
LONG 1.6%
FIELDS 1.1%
PERIODICALS 2.9%
COMMENTS 0.0%
Other 30.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:34
Average session length (minutes:seconds) 7:38
Longest session recorded (minutes:seconds) 26:32
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 617.1
Retrievals per search - standard deviation 4119.1
Percent of searches completed with 0 results 32.9%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 62 28.7%
DISPLAY (excluding automatic displays) 68 31.5%
HELP 5 2.3%
EXPLAIN 8 3.7%
SET/RESET 15 6.9%
SHOW 2 0.9%
ADD ON (AND, OR, AND NOT) 13 6.0%
LOGON or LOGOFF 33 15.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 10 4.6%
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 2 3.0% 2 100% 0 0.0 0.0
TITLE WORD 12 17.9% 4 33.3% 42 82.5 122.9
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 6 9.0% 4 66.7% 119 118.5 70.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 10 14.9% 5 50.0% 371 242.8 220.8
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 29 43.3% 3 10.3% 35 1657.0 6862.6
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 3 4.5% 1 33.3% 17 16.5 9.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 5 7.5% 2 40.0% 4 5.3 5.1
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 7 11.7% 3 42.9% 46 67.5 71.6
Single 53 88.3% 15 28.3% 42 1176.3 5687.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.1%
SHORT 42.7%
LONG 1.7%
FIELDS 0.0%
PERIODICALS 5.1%
COMMENTS 0.0%
Other 39.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 398
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 19
displays or when any of these paging options is set.
TEXT included with MAIL commands 47
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 8:48
Average session length (minutes:seconds) 12:34
Longest session recorded (minutes:seconds) 129:06
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 58.8
Retrievals per search - standard deviation 200.6
Percent of searches completed with 0 results 39.3%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 152 31.7%
DISPLAY (excluding automatic displays) 113 23.5%
HELP 35 7.3%
EXPLAIN 12 2.5%
SET/RESET 35 7.3%
SHOW 7 1.5%
ADD ON (AND, OR, AND NOT) 12 2.5%
LOGON or LOGOFF 89 18.5%
COMMENT 0 0.0%
SAVE 5 1.0%
USE 0 0.0%
OTHER 20 4.2%
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 10 6.4% 4 40.0% 11 53.5 107.0
TITLE WORD 51 32.5% 21 41.2% 7 68.7 151.2
EXACT TITLE 1 0.6% 1 100% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 3 1.9% 3 100% 0 0.0 0.0
SUBJECT 33 21.0% 18 54.5% 34 234.5 496.8
EXACT SUBJECT 2 1.3% 2 100% 0 0.0 0.0
KEYWORD 55 35.0% 13 23.6% 12 83.1 198.7
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 2 1.3% 2 100% 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
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 6 4.0% 4 66.7% 4 3.5 3.5
Single 145 96.0% 56 38.6% 13 105.3 262.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 44.2%
LONG 8.7%
FIELDS 6.7%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 38.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.1%
Ten most frequent errors:
1. First word of command is invalid 39.3%
2. NS command - no next screen 20.2%
3. FIND command with invalid index name 17.0%
4. PS command - no previous screen 5.4%
5. DISPLAY command contains invalid word 2.9%
6. Search term missing from search command 2.6%
7. Valid command at an inappropriate time 1.3%
8. MAIL command issued w/o email address 1.2%
9. DISPLAY command-record numbers too large 1.1%
10. DISPLAY command - no FIND results 0.9%
11. All others 8.1%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 29.4%
2. GUIDE 19.8%
3. INDEXES 11.1%
4. FIND 7.1%
5. Unrecognized term 6.3%
6. MAGS DATABASE 4.8%
7. ADDON SEARCH 4.8%
8. COMMANDS 4.0%
9. DISPLAYS (IAC DBS) 3.2%
10. DATABASES 2.4%
11. All others 7.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.6%
2. First word of command is invalid 22.0%
3. FIND command with invalid index name 14.6%
4. DISPLAY command - middle of >1 screen 5.8%
5. DISPLAY command-complete in one screen 5.5%
6. NS command - no next screen 5.0%
7. FIND command with zero results 4.4%
8. PS command - no previous screen 3.6%
9. DISPLAY command-first of >1 screen 3.6%
10. FIND command retrieves >1 book 3.3%
11. All others 9.6%
Ten most frequent SHOW requests:
1. SEARCH 39.5%
2. HISTORY 28.9%
3. IAC NEWS 13.2%
4. SETTINGS (IAC DBS) 7.9%
5. SYSTEM NEWS 5.3%
6. SYSTEM1 NEWS 2.6%
7. DATES 2.6%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)