MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/13/02 through 04/19/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 118 227 345
Davis 91 0 91
Irvine 58 0 58
Los Angeles 2 42 44
Riverside 15 11 26
San Diego 17 16 33
San Francisco 16 0 16
Santa Barbara 6 23 29
Santa Cruz 8 22 30
LBL 0 7 7
LLL 0 8 8
Los Alamos n/a 2 2
Other - UC 0 52 52
Stanford 2
Other-Network UC n/a 70 70
_______ ______ _____
331 480 813
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 14 26 137
2-4 a.m. 10 14 295
4-6 a.m. 1 1 0
6-8 a.m. 10 22 630
8-10 a.m. 101 224 3,694
10-12 a.m. 121 326 3,647
12-2 p.m. 135 323 3,389
2-4 p.m. 166 446 5,299
4-6 p.m. 120 312 3,773
6-8 p.m. 52 159 1,660
8-10 p.m. 50 144 1,579
10-12 p.m. 33 86 2,043
__________ __________ __________ _________________
Total: 813 2,083 26,146
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 273 609 882
Davis 231 0 231
Irvine 228 0 228
Los Angeles 5 82 87
Riverside 47 32 79
San Diego 21 16 37
San Francisco 35 0 35
Santa Barbara 16 45 61
Santa Cruz 10 40 50
LBL 0 16 16
LLL 0 23 23
Los Alamos n/a 7 7
Other - UC 0 155 155
Stanford 16
Other-Network UC n/a 176 176
_______ ______ _____
866 1,201 2,083
Number of FIND commands by database
MAGS database 1,955
NEWS database 100
COMP database 28
Total number of FIND commands 2,083
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,155 8,422 10,577
Davis 3,091 0 3,091
Irvine 890 0 890
Los Angeles 8 917 925
Riverside 276 324 600
San Diego 841 1,470 2,311
San Francisco 296 0 296
Santa Barbara 94 185 279
Santa Cruz 128 612 740
LBL 0 157 157
LLL 0 882 882
Los Alamos n/a 66 66
Other - UC 0 1,524 1,524
Stanford 15
Other-Network UC n/a 3,629 3,629
_______ ______ _____
7,779 18,188 25,982
Number of Records Displayed by database:
MAGS database 23,764
NEWS database 901
COMP database 1,481
Total number of Records Displayed 25,982
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.2%
Percent of NEWS sessions 8.9%
Percent of COMP sessions 2.0%
Percent of searches done in the MAGS database 93.9%
Percent of searches done in the NEWS database 4.8%
Percent of searches done in the COMP database 1.3%
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 1.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:41
Average session length (minutes:seconds) 12:20
Longest session recorded (minutes:seconds) 151:01
Average number of searches completed per session 2.7
Retrievals per search - median 4.0
Retrievals per search - average 684.0
Retrievals per search - standard deviation 5110.2
Percent of searches completed with 0 results 31.6%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 48.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,824 28.2%
DISPLAY (excluding automatic displays) 2,434 37.6%
HELP 215 3.3%
EXPLAIN 157 2.4%
SET/RESET 287 4.4%
SHOW 23 0.4%
ADD ON (AND, OR, AND NOT) 131 2.0%
LOGON or LOGOFF 950 14.7%
COMMENT 0 0.0%
SAVE 138 2.1%
USE 2 0.0%
OTHER 316 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 321 17.2% 96 29.9% 11 80.3 286.5
TITLE WORD 426 22.8% 147 34.5% 8 426.2 2575.7
EXACT TITLE 80 4.3% 28 35.0% 2 81.8 518.9
JOURNAL 71 3.8% 46 64.8% 921 11991.9 23643.2
EXACT JOURNAL 81 4.3% 37 45.7% 2,605 10120.2 17733.9
SUBJECT 347 18.6% 130 37.5% 33 468.4 2170.1
EXACT SUBJECT 10 0.5% 4 40.0% 11 47.8 89.9
KEYWORD 441 23.6% 86 19.5% 26 855.4 6030.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.3% 1 16.7% 81 184.0 200.1
DATE 28 1.5% 8 28.6% 9 35.4 62.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 22 1.2% 5 22.7% 19 264.4 643.7
EXACT PE 30 1.6% 5 16.7% 4 6.9 7.1
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 7 0.4% 1 14.3% 12,027 8744.3 6844.4
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 63 3.5% 19 30.2% 9 1258.8 3810.9
Single 1,739 96.5% 553 31.8% 16 1045.2 6442.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 63.8%
LONG 0.9%
FIELDS 1.3%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 30.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:21
Average session length (minutes:seconds) 9:06
Longest session recorded (minutes:seconds) 20:02
Average number of searches completed per session 1.8
Retrievals per search - median 5.0
Retrievals per search - average 154.7
Retrievals per search - standard deviation 451.7
Percent of searches completed with 0 results 32.1%
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 24 23.1%
DISPLAY (excluding automatic displays) 34 32.7%
HELP 2 1.9%
EXPLAIN 2 1.9%
SET/RESET 11 10.6%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 4 3.8%
LOGON or LOGOFF 16 15.4%
COMMENT 0 0.0%
SAVE 7 6.7%
USE 0 0.0%
OTHER 4 3.8%
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 1 4.2% 1 100% 0 0.0 0.0
TITLE WORD 6 25.0% 3 50.0% 91 99.3 90.8
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 8.3% 1 50.0% 2,028 2028.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 2 8.3% 1 50.0% 1 1.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 12 50.0% 2 16.7% 21 194.5 426.9
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 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 1 4.2% 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
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 24 100% 8 33.3% 21 267.1 579.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 57.4%
LONG 1.9%
FIELDS 3.7%
PERIODICALS 3.7%
COMMENTS 0.0%
Other 29.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 444
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 16
displays or when any of these paging options is set.
TEXT included with MAIL commands 89
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:27
Average session length (minutes:seconds) 8:04
Longest session recorded (minutes:seconds) 77:50
Average number of searches completed per session 1.4
Retrievals per search - median 2.5
Retrievals per search - average 1033.0
Retrievals per search - standard deviation 6397.4
Percent of searches completed with 0 results 30.0%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 93 27.0%
DISPLAY (excluding automatic displays) 69 20.1%
HELP 18 5.2%
EXPLAIN 6 1.7%
SET/RESET 30 8.7%
SHOW 4 1.2%
ADD ON (AND, OR, AND NOT) 7 2.0%
LOGON or LOGOFF 95 27.6%
COMMENT 0 0.0%
SAVE 2 0.6%
USE 0 0.0%
OTHER 20 5.8%
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 13 12.5% 4 30.8% 13 308.2 514.6
TITLE WORD 22 21.2% 6 27.3% 4 251.0 964.3
EXACT TITLE 5 4.8% 1 20.0% 1 1.0 0.0
JOURNAL 6 5.8% 1 16.7% 48 18176.8 24864.1
EXACT JOURNAL 2 1.9% 0 0.0% 23 23.0 2.8
SUBJECT 27 26.0% 8 29.6% 4 18.8 30.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 21 20.2% 6 28.6% 8 313.6 1000.8
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 7 6.7% 0 0.0% 13 26.9 32.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.0% 0 0.0% 144 144.0 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 10 10.8% 0 0.0% 8 19.7 29.1
Single 83 89.2% 26 31.3% 8 1801.8 8423.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.2%
SHORT 43.6%
LONG 1.8%
FIELDS 4.3%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 47.9%
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 37.1%
2. NS command - no next screen 21.4%
3. FIND command with invalid index name 15.2%
4. PS command - no previous screen 3.6%
5. DISPLAY command contains invalid word 3.1%
6. Search term missing from search command 3.1%
7. Valid command at an inappropriate time 1.9%
8. NS of SHOW/EXP command-no next screen 1.4%
9. MAIL command issued w/o email address 1.2%
10. Command contains escape or arrow key 1.1%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.7%
2. LOCATE (ARTICLE DBS) 25.5%
3. INDEXES 9.7%
4. MAGS DATABASE 6.7%
5. FIND 6.7%
6. COMMANDS 6.7%
7. DISPLAYS (IAC DBS) 3.6%
8. Unrecognized term 3.0%
9. ADDON SEARCH 1.8%
10. DATABASES 1.2%
11. All others 5.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.8%
2. First word of command is invalid 21.0%
3. FIND command with invalid index name 14.5%
4. DISPLAY command-complete in one screen 6.3%
5. DISPLAY command - middle of >1 screen 5.0%
6. FIND command retrieves >1 book 2.8%
7. FIND command with zero results 2.3%
8. DISPLAY command-first of >1 screen 2.3%
9. NS command - no next screen 2.0%
10. FIND command retrieves 1 book 1.8%
11. All others 14.5%
Ten most frequent SHOW requests:
1. HISTORY 40.7%
2. IAC NEWS 22.2%
3. SEARCH 22.2%
4. SETTINGS (IAC DBS) 7.4%
5. GLOSSARY 3.7%
6. SYSTEM NEWS 3.7%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)