MELVYL IAC DATABASES TELNET STATISTICS
Time period: 08/11/01 through 08/17/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 45 189 234
Davis 89 3 92
Irvine 53 0 53
Los Angeles 2 47 49
Riverside 18 7 25
San Diego 27 35 62
San Francisco 34 0 34
Santa Barbara 11 17 28
Santa Cruz 18 39 57
LBL 0 25 25
LLL 0 0 0
Los Alamos n/a 1 1
Other - UC 5 28 33
Stanford 26
Other-Network UC n/a 125 125
_______ ______ _____
302 516 844
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 8 28 280
2-4 a.m. 7 21 160
4-6 a.m. 0 0 0
6-8 a.m. 10 27 328
8-10 a.m. 68 213 1,965
10-12 a.m. 152 372 3,590
12-2 p.m. 164 432 4,762
2-4 p.m. 191 537 6,971
4-6 p.m. 156 378 4,350
6-8 p.m. 43 123 1,087
8-10 p.m. 25 77 857
10-12 p.m. 20 56 614
__________ __________ __________ _________________
Total: 844 2,264 24,964
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 94 563 657
Davis 191 4 195
Irvine 163 0 163
Los Angeles 5 118 123
Riverside 28 17 45
San Diego 53 104 157
San Francisco 72 0 72
Santa Barbara 14 54 68
Santa Cruz 35 112 147
LBL 0 68 68
LLL 0 0 0
Los Alamos n/a 7 7
Other - UC 1 84 85
Stanford 112
Other-Network UC n/a 365 365
_______ ______ _____
656 1,496 2,264
Number of FIND commands by database
MAGS database 1,968
NEWS database 158
COMP database 138
Total number of FIND commands 2,264
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 677 5,519 6,196
Davis 2,446 80 2,526
Irvine 1,180 0 1,180
Los Angeles 239 1,519 1,758
Riverside 142 487 629
San Diego 129 1,099 1,228
San Francisco 434 0 434
Santa Barbara 60 484 544
Santa Cruz 905 1,281 2,186
LBL 0 1,208 1,208
LLL 0 0 0
Los Alamos n/a 89 89
Other - UC 3 901 904
Stanford 184
Other-Network UC n/a 4,862 4,862
_______ ______ _____
6,215 17,529 23,928
Number of Records Displayed by database:
MAGS database 22,165
NEWS database 1,117
COMP database 1,682
Total number of Records Displayed 23,928
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.8%
Percent of NEWS sessions 8.6%
Percent of COMP sessions 6.5%
Percent of searches done in the MAGS database 86.9%
Percent of searches done in the NEWS database 7.0%
Percent of searches done in the COMP database 6.1%
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 4.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:06
Average session length (minutes:seconds) 13:34
Longest session recorded (minutes:seconds) 449:27
Average number of searches completed per session 2.7
Retrievals per search - median 6.0
Retrievals per search - average 530.0
Retrievals per search - standard deviation 3583.8
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 2.0%
Percent of long searches completed
(includes partial results) 62.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,803 27.2%
DISPLAY (excluding automatic displays) 2,727 41.2%
HELP 126 1.9%
EXPLAIN 106 1.6%
SET/RESET 280 4.2%
SHOW 25 0.4%
ADD ON (AND, OR, AND NOT) 165 2.5%
LOGON or LOGOFF 908 13.7%
COMMENT 0 0.0%
SAVE 141 2.1%
USE 3 0.0%
OTHER 340 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 479 25.3% 110 23.0% 10 38.8 100.3
TITLE WORD 441 23.3% 140 31.7% 15 711.5 4298.7
EXACT TITLE 33 1.7% 13 39.4% 8 200.0 783.1
JOURNAL 132 7.0% 64 48.5% 1,607 4999.6 8194.4
EXACT JOURNAL 65 3.4% 30 46.2% 519 4788.7 9597.5
SUBJECT 280 14.8% 83 29.6% 27 198.5 680.8
EXACT SUBJECT 14 0.7% 3 21.4% 28 306.9 488.7
KEYWORD 341 18.0% 72 21.1% 21 753.8 5767.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.2% 0 0.0% 27 21.0 12.0
DATE 49 2.6% 7 14.3% 22 131.2 334.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 14 0.7% 0 0.0% 4 14.5 25.4
EXACT PE 27 1.4% 5 18.5% 5 62.5 265.3
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 15 0.8% 2 13.3% 2,935 5836.5 5023.9
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 103 5.8% 26 25.2% 27 1066.4 2954.8
Single 1,686 94.2% 477 28.3% 17 747.6 4419.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 62.7%
LONG 2.2%
FIELDS 1.8%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 29.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:29
Average session length (minutes:seconds) 11:16
Longest session recorded (minutes:seconds) 70:37
Average number of searches completed per session 2.5
Retrievals per search - median 10.0
Retrievals per search - average 1673.7
Retrievals per search - standard deviation 10345
Percent of searches completed with 0 results 27.4%
Percent of searches entered that are long 4.3%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 115 25.6%
DISPLAY (excluding automatic displays) 152 33.9%
HELP 21 4.7%
EXPLAIN 14 3.1%
SET/RESET 30 6.7%
SHOW 15 3.3%
ADD ON (AND, OR, AND NOT) 23 5.1%
LOGON or LOGOFF 56 12.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 23 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 7 6.0% 4 57.1% 15 16.7 16.6
TITLE WORD 29 24.8% 10 34.5% 16 7861.5 26359.4
EXACT TITLE 1 0.9% 0 0.0% 1 1.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1 0.9% 0 0.0% 29,640 29640.0 0.0
SUBJECT 34 29.1% 17 50.0% 118 1579.6 2183.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 38 32.5% 5 13.2% 81 493.0 919.3
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 3 2.6% 1 33.3% 45 44.5 61.5
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 1 0.9% 0 0.0% 2 2.0 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 2.6% 0 0.0% 29 28.0 15.5
By number of indexes:
Multiple 5 4.5% 2 40.0% 43 44.0 43.5
Single 107 95.5% 33 30.8% 28 3001.3 13871.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.8%
SHORT 61.4%
LONG 0.0%
FIELDS 3.2%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 32.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 525
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 34
displays or when any of these paging options is set.
TEXT included with MAIL commands 112
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 10:57
Average session length (minutes:seconds) 13:04
Longest session recorded (minutes:seconds) 64:03
Average number of searches completed per session 2.1
Retrievals per search - median 3.0
Retrievals per search - average 422.5
Retrievals per search - standard deviation 1516.9
Percent of searches completed with 0 results 34.0%
Percent of searches entered that are long 1.9%
Percent of long searches completed
(includes partial results) 66.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 149 28.3%
DISPLAY (excluding automatic displays) 197 37.4%
HELP 10 1.9%
EXPLAIN 9 1.7%
SET/RESET 40 7.6%
SHOW 2 0.4%
ADD ON (AND, OR, AND NOT) 9 1.7%
LOGON or LOGOFF 87 16.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 23 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 8 5.2% 1 12.5% 26 408.1 678.6
TITLE WORD 31 20.1% 14 45.2% 3 100.1 248.5
EXACT TITLE 2 1.3% 1 50.0% 1 1.0 0.0
JOURNAL 1 0.6% 0 0.0% 24 24.0 0.0
EXACT JOURNAL 1 0.6% 1 100% 0 0.0 0.0
SUBJECT 52 33.8% 19 36.5% 101 950.4 1725.9
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 54 35.1% 14 25.9% 16 736.4 2441.2
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 1.9% 1 33.3% 10 10.0 12.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.6% 0 0.0% 1 1.0 0.0
EXACT PE 1 0.6% 0 0.0% 29 29.0 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 5 3.4% 1 20.0% 10 11.3 12.0
Single 143 96.6% 49 34.3% 26 695.4 1908.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 58.7%
LONG 4.0%
FIELDS 3.1%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 31.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. First word of command is invalid 35.3%
2. NS command - no next screen 28.2%
3. FIND command with invalid index name 8.6%
4. PS command - no previous screen 4.6%
5. Valid command at an inappropriate time 3.2%
6. DISPLAY command contains invalid word 2.2%
7. DISPLAY command-record numbers too large 1.6%
8. Add-on search, no index name after verb 1.5%
9. DISPLAY command - no FIND results 1.2%
10. Search term missing from search command 1.1%
11. All others 12.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.3%
2. LOCATE (ARTICLE DBS) 22.5%
3. MAGS DATABASE 7.8%
4. ADDON SEARCH 6.2%
5. FIND 5.4%
6. ABI TEXT 3.9%
7. INDEXES 3.1%
8. DISPLAYS (IAC DBS) 3.1%
9. MAIL 3.1%
10. COMMANDS 1.6%
11. All others 20.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.3%
2. First word of command is invalid 12.9%
3. FIND command with invalid index name 10.8%
4. DISPLAY command-first of >1 screen 9.4%
5. DISPLAY command - middle of >1 screen 6.6%
6. DISPLAY command-complete in one screen 6.3%
7. FIND command with zero results 3.5%
8. FIND command retrieves >1 book 3.5%
9. DISPLAY command - last of >1 screen 3.1%
10. NS command - no next screen 2.8%
11. All others 13.6%
Ten most frequent SHOW requests:
1. HISTORY 40.5%
2. SEARCH 28.6%
3. IAC NEWS 11.9%
4. SETTINGS (IAC DBS) 4.8%
5. LOCATION 2.4%
6. 0207 2.4%
7. 0247 2.4%
8. SYSTEM NEWS 2.4%
9. LIBRARY NEWS 2.4%
10. LOCAL INFORMATION 2.4%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)