MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/27/01 through 02/02/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 177 313 490
Davis 249 2 251
Irvine 175 0 175
Los Angeles 9 116 125
Riverside 55 17 72
San Diego 29 43 72
San Francisco 72 0 72
Santa Barbara 67 43 110
Santa Cruz 86 31 117
LBL 0 15 15
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 3 25 28
Stanford 50
Other-Network UC n/a 140 140
_______ ______ _____
922 749 1,721
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 22 62 768
2-4 a.m. 2 7 436
4-6 a.m. 14 29 304
6-8 a.m. 33 59 418
8-10 a.m. 179 446 3,700
10-12 a.m. 278 759 6,850
12-2 p.m. 333 866 8,467
2-4 p.m. 347 907 9,245
4-6 p.m. 216 543 6,147
6-8 p.m. 133 321 3,781
8-10 p.m. 103 283 2,997
10-12 p.m. 61 229 3,614
__________ __________ __________ _________________
Total: 1,721 4,511 46,727
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 457 792 1,249
Davis 579 2 581
Irvine 450 0 450
Los Angeles 18 290 308
Riverside 151 49 200
San Diego 92 91 183
San Francisco 224 0 224
Santa Barbara 200 96 296
Santa Cruz 220 85 305
LBL 0 27 27
LLL 0 12 12
Los Alamos n/a 0 0
Other - UC 12 60 72
Stanford 138
Other-Network UC n/a 466 466
_______ ______ _____
2,403 1,970 4,511
Number of FIND commands by database
MAGS database 3,993
NEWS database 383
COMP database 135
Total number of FIND commands 4,511
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,438 9,667 13,105
Davis 3,779 73 3,852
Irvine 3,124 0 3,124
Los Angeles 184 3,620 3,804
Riverside 1,172 417 1,589
San Diego 583 993 1,576
San Francisco 3,943 0 3,943
Santa Barbara 1,690 847 2,537
Santa Cruz 1,671 763 2,434
LBL 0 394 394
LLL 0 137 137
Los Alamos n/a 0 0
Other - UC 135 671 806
Stanford 183
Other-Network UC n/a 7,818 7,818
_______ ______ _____
19,719 25,400 45,302
Number of Records Displayed by database:
MAGS database 41,843
NEWS database 3,497
COMP database 1,387
Total number of Records Displayed 45,302
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.1%
Percent of NEWS sessions 9.9%
Percent of COMP sessions 4.0%
Percent of searches done in the MAGS database 88.5%
Percent of searches done in the NEWS database 8.5%
Percent of searches done in the COMP database 3.0%
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 3.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.1
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:11
Average session length (minutes:seconds) 10:47
Longest session recorded (minutes:seconds) 189:25
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 603.6
Retrievals per search - standard deviation 6393.7
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 46.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,762 27.7%
DISPLAY (excluding automatic displays) 5,112 37.6%
HELP 429 3.2%
EXPLAIN 275 2.0%
SET/RESET 584 4.3%
SHOW 72 0.5%
ADD ON (AND, OR, AND NOT) 231 1.7%
LOGON or LOGOFF 1,942 14.3%
COMMENT 0 0.0%
SAVE 447 3.3%
USE 4 0.0%
OTHER 733 5.4%
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 912 23.5% 274 30.0% 8 48.9 186.3
TITLE WORD 765 19.7% 239 31.2% 11 431.7 4910.8
EXACT TITLE 74 1.9% 27 36.5% 4 340.0 949.0
JOURNAL 144 3.7% 78 54.2% 2,473 11780.4 25716.9
EXACT JOURNAL 60 1.5% 28 46.7% 2,357 8630.0 13705.3
SUBJECT 695 17.9% 221 31.8% 19 270.9 828.9
EXACT SUBJECT 49 1.3% 19 38.8% 11 687.1 1700.0
KEYWORD 1,002 25.8% 210 21.0% 21 1094.6 10564.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.1% 0 0.0% 9 14.8 17.2
DATE 61 1.6% 18 29.5% 3 126.0 639.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 59 1.5% 5 8.5% 6 89.4 278.3
EXACT PE 32 0.8% 4 12.5% 2 51.7 227.7
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 22 0.6% 1 4.5% 784 1716.9 2642.8
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 150 4.0% 52 34.7% 4 422.2 1442.2
Single 3,578 96.0% 1,020 28.5% 15 902.6 7924.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 62.9%
LONG 1.6%
FIELDS 0.9%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 31.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:12
Average session length (minutes:seconds) 6:56
Longest session recorded (minutes:seconds) 35:33
Average number of searches completed per session 1.9
Retrievals per search - median 4.0
Retrievals per search - average 4429.9
Retrievals per search - standard deviation 42482
Percent of searches completed with 0 results 35.1%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 66.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 117 23.2%
DISPLAY (excluding automatic displays) 195 38.6%
HELP 17 3.4%
EXPLAIN 17 3.4%
SET/RESET 33 6.5%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 18 3.6%
LOGON or LOGOFF 84 16.6%
COMMENT 0 0.0%
SAVE 1 0.2%
USE 0 0.0%
OTHER 23 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 28 23.1% 14 50.0% 18 71.0 91.7
TITLE WORD 23 19.0% 8 34.8% 12 645.5 1585.8
EXACT TITLE 1 0.8% 1 100% 0 0.0 0.0
JOURNAL 6 5.0% 4 66.7% 18,026 18025.5 25486.2
EXACT JOURNAL 2 1.7% 0 0.0% 12,155 12154.5 14345.1
SUBJECT 27 22.3% 8 29.6% 45 485.2 967.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 32 26.4% 4 12.5% 90 18324.6 92575.6
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 2 1.7% 1 50.0% 36 36.0 0.0
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 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 5 4.3% 3 60.0% 20 20.0 22.6
Single 111 95.7% 34 30.6% 47 7705.2 55971.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 67.2%
LONG 0.3%
FIELDS 2.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 27.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 874
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 65
displays or when any of these paging options is set.
TEXT included with MAIL commands 149
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 3:30
Average session length (minutes:seconds) 7:58
Longest session recorded (minutes:seconds) 70:21
Average number of searches completed per session 2.2
Retrievals per search - median 4.0
Retrievals per search - average 1458.4
Retrievals per search - standard deviation 21722
Percent of searches completed with 0 results 31.6%
Percent of searches entered that are long 4.2%
Percent of long searches completed
(includes partial results) 62.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 361 33.4%
DISPLAY (excluding automatic displays) 260 24.0%
HELP 40 3.7%
EXPLAIN 43 4.0%
SET/RESET 82 7.6%
SHOW 4 0.4%
ADD ON (AND, OR, AND NOT) 22 2.0%
LOGON or LOGOFF 199 18.4%
COMMENT 0 0.0%
SAVE 10 0.9%
USE 0 0.0%
OTHER 61 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 19 5.0% 5 26.3% 7 88.6 156.7
TITLE WORD 86 22.7% 19 22.1% 10 92.0 201.5
EXACT TITLE 1 0.3% 0 0.0% 82 82.0 0.0
JOURNAL 8 2.1% 5 62.5% 283 139903 242000
EXACT JOURNAL 2 0.5% 1 50.0% 7,015 7015.0 0.0
SUBJECT 143 37.7% 62 43.4% 24 752.3 2341.9
EXACT SUBJECT 8 2.1% 3 37.5% 290 2147.6 4085.9
KEYWORD 94 24.8% 26 27.7% 16 610.9 2041.3
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 6 1.6% 1 16.7% 18 28.0 24.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 9 2.4% 1 11.1% 4 7.5 9.6
EXACT PE 3 0.8% 0 0.0% 1 1.0 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 26 7.4% 8 30.8% 11 794.1 2214.0
Single 326 92.6% 106 32.5% 17 2359.3 28297.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.0%
SHORT 42.3%
LONG 3.2%
FIELDS 0.9%
PERIODICALS 2.9%
COMMENTS 0.0%
Other 45.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.1%
Ten most frequent errors:
1. First word of command is invalid 38.5%
2. NS command - no next screen 25.6%
3. FIND command with invalid index name 13.1%
4. PS command - no previous screen 3.9%
5. DISPLAY command contains invalid word 2.8%
6. Search term missing from search command 1.8%
7. Valid command at an inappropriate time 1.7%
8. Add-on search, no index name after verb 0.9%
9. DISPLAY command - no FIND results 0.8%
10. MAIL command issued w/o email address 0.7%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.0%
2. LOCATE (ARTICLE DBS) 16.7%
3. COMMANDS 11.6%
4. FIND 9.9%
5. INDEXES 6.9%
6. Unrecognized term 4.5%
7. MAGS DATABASE 3.9%
8. ADDON SEARCH 2.7%
9. MAIL 2.1%
10. DATABASES 2.1%
11. All others 10.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.5%
2. First word of command is invalid 20.8%
3. FIND command with invalid index name 9.5%
4. FIND command with zero results 6.0%
5. DISPLAY command-first of >1 screen 4.9%
6. DISPLAY command-complete in one screen 4.1%
7. NS command - no next screen 4.0%
8. FIND command retrieves >1 book 3.4%
9. DISPLAY command - middle of >1 screen 3.0%
10. PS command - no previous screen 2.8%
11. All others 11.9%
Ten most frequent SHOW requests:
1. SEARCH 52.0%
2. HISTORY 30.7%
3. IAC NEWS 6.7%
4. SETTINGS (IAC DBS) 5.3%
5. MAIL SETTINGS 2.7%
6. MAIL SETTINGS 1.3%
7. DATABASES 1.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)