MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/09/01 through 06/15/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 67 181 248
Davis 105 1 106
Irvine 144 0 144
Los Angeles 1 64 65
Riverside 38 20 58
San Diego 7 55 62
San Francisco 35 0 35
Santa Barbara 10 24 34
Santa Cruz 37 15 52
LBL 0 24 24
LLL 0 0 0
Los Alamos n/a 4 4
Other - UC 0 6 6
Stanford 35
Other-Network UC n/a 126 126
_______ ______ _____
444 520 999
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 27 45 784
2-4 a.m. 14 42 390
4-6 a.m. 6 11 532
6-8 a.m. 15 41 653
8-10 a.m. 101 248 2,192
10-12 a.m. 148 401 3,930
12-2 p.m. 199 505 5,513
2-4 p.m. 226 565 5,549
4-6 p.m. 128 360 4,730
6-8 p.m. 59 120 2,031
8-10 p.m. 30 86 1,757
10-12 p.m. 46 157 1,422
__________ __________ __________ _________________
Total: 999 2,581 29,483
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 203 527 730
Davis 271 1 272
Irvine 304 0 304
Los Angeles 1 129 130
Riverside 98 50 148
San Diego 7 183 190
San Francisco 80 0 80
Santa Barbara 17 58 75
Santa Cruz 117 27 144
LBL 0 42 42
LLL 0 0 0
Los Alamos n/a 7 7
Other - UC 0 21 21
Stanford 96
Other-Network UC n/a 342 342
_______ ______ _____
1,098 1,387 2,581
Number of FIND commands by database
MAGS database 2,255
NEWS database 208
COMP database 118
Total number of FIND commands 2,581
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,166 5,593 8,759
Davis 2,627 13 2,640
Irvine 1,992 0 1,992
Los Angeles 10 2,699 2,709
Riverside 890 986 1,876
San Diego 13 1,615 1,628
San Francisco 978 0 978
Santa Barbara 241 382 623
Santa Cruz 736 320 1,056
LBL 0 1,394 1,394
LLL 0 0 0
Los Alamos n/a 134 134
Other - UC 0 162 162
Stanford 84
Other-Network UC n/a 5,081 5,081
_______ ______ _____
10,653 18,379 29,116
Number of Records Displayed by database:
MAGS database 28,002
NEWS database 640
COMP database 841
Total number of Records Displayed 29,116
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 4.4%
Percent of searches done in the MAGS database 87.4%
Percent of searches done in the NEWS database 8.1%
Percent of searches done in the COMP database 4.6%
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 2.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:32
Average session length (minutes:seconds) 11:27
Longest session recorded (minutes:seconds) 152:54
Average number of searches completed per session 2.6
Retrievals per search - median 5.0
Retrievals per search - average 645.0
Retrievals per search - standard deviation 7779.9
Percent of searches completed with 0 results 28.9%
Percent of searches entered that are long 2.3%
Percent of long searches completed
(includes partial results) 84.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,097 28.6%
DISPLAY (excluding automatic displays) 2,917 39.8%
HELP 104 1.4%
EXPLAIN 94 1.3%
SET/RESET 394 5.4%
SHOW 19 0.3%
ADD ON (AND, OR, AND NOT) 158 2.2%
LOGON or LOGOFF 1,034 14.1%
COMMENT 1 0.0%
SAVE 141 1.9%
USE 2 0.0%
OTHER 362 4.9%
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 489 21.9% 142 29.0% 9 59.4 230.3
TITLE WORD 530 23.8% 175 33.0% 11 560.9 3873.8
EXACT TITLE 109 4.9% 44 40.4% 2 31.2 107.6
JOURNAL 128 5.7% 40 31.3% 691 3523.0 7401.4
EXACT JOURNAL 71 3.2% 33 46.5% 1,872 3464.3 4671.5
SUBJECT 318 14.3% 117 36.8% 22 209.6 463.0
EXACT SUBJECT 8 0.4% 3 37.5% 27 136.2 169.8
KEYWORD 418 18.7% 74 17.7% 45 1975.8 18816.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.0% 0 0.0% 10 10.0 0.0
DATE 44 2.0% 5 11.4% 19 61.4 136.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 58 2.6% 9 15.5% 5 36.7 113.7
EXACT PE 35 1.6% 2 5.7% 4 10.3 12.8
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 22 1.0% 5 22.7% 2,141 5132.9 8180.9
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 146 7.0% 43 29.4% 12 560.3 2342.8
Single 1,938 93.0% 563 29.0% 18 990.8 9889.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 61.5%
LONG 1.2%
FIELDS 0.7%
PERIODICALS 2.9%
COMMENTS 0.0%
Other 31.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 10:43
Average session length (minutes:seconds) 8:44
Longest session recorded (minutes:seconds) 22:04
Average number of searches completed per session 2.7
Retrievals per search - median 4.0
Retrievals per search - average 228.9
Retrievals per search - standard deviation 821.9
Percent of searches completed with 0 results 37.3%
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 103 30.1%
DISPLAY (excluding automatic displays) 125 36.5%
HELP 5 1.5%
EXPLAIN 2 0.6%
SET/RESET 17 5.0%
SHOW 2 0.6%
ADD ON (AND, OR, AND NOT) 15 4.4%
LOGON or LOGOFF 58 17.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 15 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 10 9.1% 5 50.0% 34 120.8 220.2
TITLE WORD 36 32.7% 20 55.6% 33 126.2 217.2
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 1.8% 0 0.0% 5,631 5631.0 0.0
EXACT JOURNAL 1 0.9% 1 100% 0 0.0 0.0
SUBJECT 31 28.2% 11 35.5% 67 360.4 801.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 24 21.8% 7 29.2% 86 152.2 204.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 2.7% 3 100% 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 0.9% 0 0.0% 4 4.0 0.0
EXACT PE 1 0.9% 0 0.0% 9 9.0 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 0.9% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 7 6.8% 5 71.4% 56 55.5 77.1
Single 96 93.2% 37 38.5% 35 397.8 1107.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.7%
SHORT 56.5%
LONG 0.9%
FIELDS 4.7%
PERIODICALS 3.7%
COMMENTS 0.0%
Other 29.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 673
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 56
displays or when any of these paging options is set.
TEXT included with MAIL commands 103
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:24
Average session length (minutes:seconds) 9:12
Longest session recorded (minutes:seconds) 106:10
Average number of searches completed per session 2.2
Retrievals per search - median 1.0
Retrievals per search - average 2735.0
Retrievals per search - standard deviation 31917
Percent of searches completed with 0 results 46.8%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 195 38.7%
DISPLAY (excluding automatic displays) 90 17.9%
HELP 24 4.8%
EXPLAIN 14 2.8%
SET/RESET 50 9.9%
SHOW 4 0.8%
ADD ON (AND, OR, AND NOT) 13 2.6%
LOGON or LOGOFF 94 18.6%
COMMENT 0 0.0%
SAVE 5 1.0%
USE 0 0.0%
OTHER 15 3.0%
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 22 10.9% 8 36.4% 5 267.8 507.6
TITLE WORD 82 40.6% 41 50.0% 9 603.1 3496.1
EXACT TITLE 4 2.0% 2 50.0% 2 1.5 0.7
JOURNAL 6 3.0% 4 66.7% 244898 244898 295995
EXACT JOURNAL 1 0.5% 0 0.0% 13 13.0 0.0
SUBJECT 31 15.3% 16 51.6% 43 259.2 433.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 44 21.8% 19 43.2% 10 111.5 232.1
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 5.0% 5 50.0% 2 7123.0 15918.0
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 2 1.0% 0 0.0% 3 3.0 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 10 5.2% 4 40.0% 2 5936.0 14531.4
Single 182 94.8% 87 47.8% 9 5151.1 46618.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
SHORT 48.2%
LONG 1.4%
FIELDS 0.0%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 48.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.0%
Ten most frequent errors:
1. NS command - no next screen 31.9%
2. First word of command is invalid 30.9%
3. FIND command with invalid index name 13.5%
4. DISPLAY command contains invalid word 3.1%
5. PS command - no previous screen 3.1%
6. Search term missing from search command 2.0%
7. DISPLAY command-record numbers too large 1.3%
8. Add-on search, no index name after verb 1.2%
9. Valid command at an inappropriate time 0.9%
10. MAIL command issued w/o email address 0.9%
11. All others 11.1%
Ten most frequent EXPLAIN requests:
1. GUIDE 30.9%
2. INDEXES 12.7%
3. FIND 11.8%
4. LOCATE (ARTICLE DBS) 10.0%
5. MAGS DATABASE 7.3%
6. COMMANDS 6.4%
7. NEWS DATABASE 2.7%
8. DATES 2.7%
9. DISPLAYS (IAC DBS) 2.7%
10. DATABASES 2.7%
11. All others 10.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 33.3%
2. First word of command is invalid 19.8%
3. FIND command with invalid index name 13.6%
4. FIND command with zero results 9.1%
5. DISPLAY command-first of >1 screen 3.3%
6. DISPLAY command - middle of >1 screen 2.5%
7. PS command - no previous screen 2.1%
8. FIND command retrieves >1 book 2.1%
9. F/BR with index invalid in current DB 1.6%
10. NS command - no next screen 1.2%
11. All others 11.5%
Ten most frequent SHOW requests:
1. HISTORY 65.2%
2. SEARCH 17.4%
3. IAC NEWS 8.7%
4. SETTINGS (IAC DBS) 4.3%
5. MAIL STATUS 4.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)