MELVYL IAC DATABASES TELNET STATISTICS
Time period: 07/21/01 through 07/27/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 64 241 305
Davis 134 1 135
Irvine 120 0 120
Los Angeles 1 93 94
Riverside 20 26 46
San Diego 6 51 57
San Francisco 38 0 38
Santa Barbara 10 22 32
Santa Cruz 29 15 44
LBL 0 10 10
LLL 0 1 1
Los Alamos n/a 1 1
Other - UC 5 15 20
Stanford 47
Other-Network UC n/a 80 80
_______ ______ _____
427 556 1,030
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 26 76 1,150
2-4 a.m. 14 104 1,469
4-6 a.m. 4 17 210
6-8 a.m. 10 20 212
8-10 a.m. 113 259 2,536
10-12 a.m. 194 548 6,787
12-2 p.m. 178 460 3,859
2-4 p.m. 243 667 6,601
4-6 p.m. 146 325 3,420
6-8 p.m. 47 120 13,042
8-10 p.m. 24 83 1,051
10-12 p.m. 31 144 656
__________ __________ __________ _________________
Total: 1,030 2,823 40,993
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 142 678 820
Davis 341 1 342
Irvine 376 0 376
Los Angeles 1 241 242
Riverside 45 70 115
San Diego 13 141 154
San Francisco 102 0 102
Santa Barbara 32 26 58
Santa Cruz 65 38 103
LBL 0 55 55
LLL 0 1 1
Los Alamos n/a 4 4
Other - UC 7 86 93
Stanford 151
Other-Network UC n/a 207 207
_______ ______ _____
1,124 1,548 2,823
Number of FIND commands by database
MAGS database 2,518
NEWS database 217
COMP database 88
Total number of FIND commands 2,823
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,302 8,956 10,258
Davis 2,344 42 2,386
Irvine 1,947 0 1,947
Los Angeles 26 3,176 3,202
Riverside 424 457 881
San Diego 81 12,871 12,952
San Francisco 1,659 0 1,659
Santa Barbara 318 404 722
Santa Cruz 778 349 1,127
LBL 0 532 532
LLL 0 23 23
Los Alamos n/a 164 164
Other - UC 49 1,432 1,481
Stanford 183
Other-Network UC n/a 2,064 2,064
_______ ______ _____
8,928 30,470 39,581
Number of Records Displayed by database:
MAGS database 38,205
NEWS database 1,822
COMP database 966
Total number of Records Displayed 39,581
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.6%
Percent of NEWS sessions 9.1%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 89.2%
Percent of searches done in the NEWS database 7.7%
Percent of searches done in the COMP database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 1.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.6
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:35
Average session length (minutes:seconds) 11:49
Longest session recorded (minutes:seconds) 132:48
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 403.6
Retrievals per search - standard deviation 3173.3
Percent of searches completed with 0 results 28.2%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 82.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,289 28.2%
DISPLAY (excluding automatic displays) 3,076 37.8%
HELP 186 2.3%
EXPLAIN 128 1.6%
SET/RESET 434 5.3%
SHOW 36 0.4%
ADD ON (AND, OR, AND NOT) 229 2.8%
LOGON or LOGOFF 1,072 13.2%
COMMENT 1 0.0%
SAVE 238 2.9%
USE 3 0.0%
OTHER 437 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 648 26.7% 166 25.6% 11 68.0 222.6
TITLE WORD 617 25.4% 212 34.4% 8 406.5 3964.3
EXACT TITLE 86 3.5% 49 57.0% 3 27.7 84.8
JOURNAL 152 6.3% 47 30.9% 700 4284.8 10776.4
EXACT JOURNAL 39 1.6% 18 46.2% 830 6634.5 11073.9
SUBJECT 304 12.5% 92 30.3% 27 264.2 1886.9
EXACT SUBJECT 9 0.4% 3 33.3% 392 658.0 967.0
KEYWORD 435 17.9% 87 20.0% 25 351.4 1472.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.2% 2 50.0% 29 29.0 32.5
DATE 52 2.1% 8 15.4% 24 166.4 350.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 27 1.1% 2 7.4% 4 98.9 437.8
EXACT PE 28 1.2% 6 21.4% 2 5.2 8.1
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 27 1.1% 3 11.1% 354 1251.0 2051.5
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 145 6.4% 39 26.9% 16 344.4 1097.4
Single 2,135 93.6% 616 28.9% 16 616.7 4032.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 62.3%
LONG 1.5%
FIELDS 0.9%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 31.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:21
Average session length (minutes:seconds) 10:35
Longest session recorded (minutes:seconds) 58:13
Average number of searches completed per session 2.0
Retrievals per search - median 14.5
Retrievals per search - average 543.6
Retrievals per search - standard deviation 1555.3
Percent of searches completed with 0 results 26.1%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 74 21.4%
DISPLAY (excluding automatic displays) 153 44.3%
HELP 4 1.2%
EXPLAIN 6 1.7%
SET/RESET 17 4.9%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 14 4.1%
LOGON or LOGOFF 61 17.7%
COMMENT 0 0.0%
SAVE 1 0.3%
USE 0 0.0%
OTHER 15 4.3%
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 6 7.7% 3 50.0% 3 3.0 2.0
TITLE WORD 20 25.6% 6 30.0% 28 71.2 77.7
EXACT TITLE 1 1.3% 1 100% 0 0.0 0.0
JOURNAL 3 3.8% 0 0.0% 5,591 6243.3 1129.9
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 8 10.3% 3 37.5% 19 1060.8 2340.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 34 43.6% 7 20.6% 69 707.1 1655.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 3.8% 0 0.0% 1,943 2809.3 3327.2
DATE 1 1.3% 0 0.0% 13 13.0 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 2 2.6% 1 50.0% 4 4.0 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 4 5.4% 0 0.0% 978 2110.3 3055.3
Single 70 94.6% 21 30.0% 36 728.4 1826.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.4%
SHORT 70.5%
LONG 1.3%
FIELDS 1.8%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 25.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 560
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 38
displays or when any of these paging options is set.
TEXT included with MAIL commands 125
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:28
Average session length (minutes:seconds) 11:47
Longest session recorded (minutes:seconds) 72:27
Average number of searches completed per session 2.3
Retrievals per search - median 2.5
Retrievals per search - average 118.9
Retrievals per search - standard deviation 521.4
Percent of searches completed with 0 results 32.4%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 212 35.9%
DISPLAY (excluding automatic displays) 153 25.9%
HELP 19 3.2%
EXPLAIN 11 1.9%
SET/RESET 43 7.3%
SHOW 4 0.7%
ADD ON (AND, OR, AND NOT) 5 0.8%
LOGON or LOGOFF 117 19.8%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 26 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 23 10.3% 8 34.8% 3 122.8 416.2
TITLE WORD 99 44.2% 29 29.3% 9 163.1 714.7
EXACT TITLE 4 1.8% 1 25.0% 1 2.0 1.7
JOURNAL 1 0.4% 1 100% 0 0.0 0.0
EXACT JOURNAL 1 0.4% 1 100% 0 0.0 0.0
SUBJECT 38 17.0% 19 50.0% 33 78.5 147.5
EXACT SUBJECT 3 1.3% 0 0.0% 24 881.3 1501.4
KEYWORD 42 18.8% 10 23.8% 30 254.8 630.1
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 4.5% 2 20.0% 11 20.0 22.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 1.3% 0 0.0% 49 37.3 27.4
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 13 6.2% 3 23.1% 2 16.3 21.6
Single 198 93.8% 65 32.8% 13 191.7 654.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
SHORT 48.6%
LONG 1.5%
FIELDS 0.3%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 45.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.1%
Ten most frequent errors:
1. NS command - no next screen 31.8%
2. First word of command is invalid 31.0%
3. FIND command with invalid index name 12.1%
4. DISPLAY command contains invalid word 3.6%
5. PS command - no previous screen 3.4%
6. Search term missing from search command 2.7%
7. Valid command at an inappropriate time 2.1%
8. Add-on search, no index name after verb 0.9%
9. DISPLAY command-record numbers too large 0.7%
10. MAIL command issued w/o email address 0.7%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.6%
2. LOCATE (ARTICLE DBS) 13.1%
3. FIND 11.0%
4. COMMANDS 10.3%
5. INDEXES 9.7%
6. MAGS DATABASE 4.8%
7. Unrecognized term 3.4%
8. DATABASES 3.4%
9. DISPLAYS (IAC DBS) 2.8%
10. A014 1.4%
11. All others 12.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.1%
2. First word of command is invalid 18.9%
3. FIND command with invalid index name 13.3%
4. FIND command with zero results 7.3%
5. DISPLAY command - middle of >1 screen 4.5%
6. NS command - no next screen 4.2%
7. DISPLAY command - last of >1 screen 3.4%
8. DISPLAY command-complete in one screen 2.8%
9. PS command - no previous screen 2.3%
10. DISPLAY command-first of >1 screen 2.0%
11. All others 14.1%
Ten most frequent SHOW requests:
1. HISTORY 42.5%
2. SEARCH 30.0%
3. SETTINGS (IAC DBS) 7.5%
4. IAC NEWS 5.0%
5. SYSTEM NEWS 5.0%
6. UCI NEWS 2.5%
7. LIBRARY NEWS 2.5%
8. MAIL SETTINGS 2.5%
9. DATABASES 2.5%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)