MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/09/02 through 02/15/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 97 170 267
Davis 111 2 113
Irvine 30 0 30
Los Angeles 4 42 46
Riverside 6 4 10
San Diego 21 31 52
San Francisco 7 0 7
Santa Barbara 6 16 22
Santa Cruz 10 19 29
LBL 0 5 5
LLL 0 0 0
Los Alamos n/a 1 1
Other - UC 0 36 36
Stanford 4
Other-Network UC n/a 73 73
_______ ______ _____
292 399 695
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 10 21 323
2-4 a.m. 5 16 178
4-6 a.m. 3 15 221
6-8 a.m. 8 23 189
8-10 a.m. 59 111 983
10-12 a.m. 138 266 2,858
12-2 p.m. 108 216 3,058
2-4 p.m. 167 401 4,418
4-6 p.m. 88 236 3,372
6-8 p.m. 46 169 1,622
8-10 p.m. 41 113 838
10-12 p.m. 22 47 401
__________ __________ __________ _________________
Total: 695 1,634 18,461
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 235 418 653
Davis 232 3 235
Irvine 66 0 66
Los Angeles 5 103 108
Riverside 14 17 31
San Diego 18 65 83
San Francisco 12 0 12
Santa Barbara 16 32 48
Santa Cruz 19 51 70
LBL 0 9 9
LLL 0 0 0
Los Alamos n/a 2 2
Other - UC 0 67 67
Stanford 31
Other-Network UC n/a 219 219
_______ ______ _____
617 986 1,634
Number of FIND commands by database
MAGS database 1,479
NEWS database 82
COMP database 73
Total number of FIND commands 1,634
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,223 5,247 8,470
Davis 1,738 118 1,856
Irvine 743 0 743
Los Angeles 25 893 918
Riverside 67 214 281
San Diego 10 922 932
San Francisco 46 0 46
Santa Barbara 93 555 648
Santa Cruz 123 1,319 1,442
LBL 0 148 148
LLL 0 0 0
Los Alamos n/a 23 23
Other - UC 0 792 792
Stanford 23
Other-Network UC n/a 1,963 1,963
_______ ______ _____
6,068 12,194 18,285
Number of Records Displayed by database:
MAGS database 17,341
NEWS database 471
COMP database 649
Total number of Records Displayed 18,285
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.9%
Percent of NEWS sessions 7.1%
Percent of COMP sessions 4.0%
Percent of searches done in the MAGS database 90.5%
Percent of searches done in the NEWS database 5.0%
Percent of searches done in the COMP database 4.5%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.4
Standard deviation in seconds 1.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.1
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:17
Average session length (minutes:seconds) 10:47
Longest session recorded (minutes:seconds) 127:13
Average number of searches completed per session 2.4
Retrievals per search - median 5.0
Retrievals per search - average 761.4
Retrievals per search - standard deviation 13341
Percent of searches completed with 0 results 30.2%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 38.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,389 27.8%
DISPLAY (excluding automatic displays) 1,807 36.2%
HELP 193 3.9%
EXPLAIN 127 2.5%
SET/RESET 208 4.2%
SHOW 17 0.3%
ADD ON (AND, OR, AND NOT) 90 1.8%
LOGON or LOGOFF 859 17.2%
COMMENT 0 0.0%
SAVE 45 0.9%
USE 0 0.0%
OTHER 258 5.2%
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 286 20.0% 76 26.6% 13 103.2 479.2
TITLE WORD 336 23.5% 108 32.1% 11 151.6 413.7
EXACT TITLE 37 2.6% 16 43.2% 4 35.2 78.4
JOURNAL 76 5.3% 32 42.1% 1,140 5779.0 14433.0
EXACT JOURNAL 39 2.7% 27 69.2% 1,929 4968.9 6976.2
SUBJECT 300 20.9% 108 36.0% 22 232.4 741.5
EXACT SUBJECT 45 3.1% 7 15.6% 10 21.8 30.9
KEYWORD 253 17.7% 40 15.8% 37 3028.5 34092.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 31 31.0 0.0
DATE 13 0.9% 2 15.4% 234 257.1 327.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 23 1.6% 7 30.4% 15 195.9 704.5
EXACT PE 5 0.3% 1 20.0% 16 17.0 17.0
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 18 1.3% 4 22.2% 26 2192.4 4483.4
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 61 4.5% 19 31.1% 17 670.8 2579.3
Single 1,309 95.5% 390 29.8% 20 1133.3 16777.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 59.4%
LONG 2.7%
FIELDS 1.1%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 32.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:34
Average session length (minutes:seconds) 7:29
Longest session recorded (minutes:seconds) 23:28
Average number of searches completed per session 2.5
Retrievals per search - median 7.0
Retrievals per search - average 241.3
Retrievals per search - standard deviation 960.7
Percent of searches completed with 0 results 26.8%
Percent of searches entered that are long 4.1%
Percent of long searches completed
(includes partial results) 33.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 68 30.8%
DISPLAY (excluding automatic displays) 88 39.8%
HELP 6 2.7%
EXPLAIN 2 0.9%
SET/RESET 10 4.5%
SHOW 1 0.5%
ADD ON (AND, OR, AND NOT) 5 2.3%
LOGON or LOGOFF 34 15.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 7 3.2%
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 3 4.0% 2 66.7% 1 1.0 0.0
TITLE WORD 19 25.3% 6 31.6% 26 176.0 227.1
EXACT TITLE 1 1.3% 1 100% 0 0.0 0.0
JOURNAL 8 10.7% 3 37.5% 122 121.0 100.7
EXACT JOURNAL 1 1.3% 1 100% 0 0.0 0.0
SUBJECT 12 16.0% 5 41.7% 7 137.1 207.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 18 24.0% 1 5.6% 19 772.3 1888.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 9.3% 2 28.6% 122 121.0 100.7
DATE 2 2.7% 1 50.0% 64 64.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 4.0% 0 0.0% 8 15.0 16.6
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 1 1.3% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 8 12.1% 2 25.0% 93 111.5 93.0
Single 58 87.9% 17 29.3% 20 399.0 1245.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.6%
SHORT 60.1%
LONG 2.5%
FIELDS 0.6%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 33.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 355
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 18
displays or when any of these paging options is set.
TEXT included with MAIL commands 73
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:54
Average session length (minutes:seconds) 6:58
Longest session recorded (minutes:seconds) 62:30
Average number of searches completed per session 1.7
Retrievals per search - median 3.0
Retrievals per search - average 187.1
Retrievals per search - standard deviation 640.7
Percent of searches completed with 0 results 31.7%
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 77 30.4%
DISPLAY (excluding automatic displays) 57 22.5%
HELP 12 4.7%
EXPLAIN 9 3.6%
SET/RESET 23 9.1%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 5 2.0%
LOGON or LOGOFF 59 23.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 11 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 13 16.7% 3 23.1% 42 216.8 356.7
TITLE WORD 19 24.4% 7 36.8% 11 107.3 223.5
EXACT TITLE 2 2.6% 0 0.0% 34 34.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 21 26.9% 9 42.9% 21 687.2 1481.7
EXACT SUBJECT 3 3.8% 3 100% 0 0.0 0.0
KEYWORD 19 24.4% 2 10.5% 8 201.4 453.8
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 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 1.3% 1 100% 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
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 1 1.3% 1 100% 0 0.0 0.0
Single 76 98.7% 23 30.3% 10 286.7 781.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
SHORT 48.8%
LONG 1.7%
FIELDS 2.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 43.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.0%
Ten most frequent errors:
1. First word of command is invalid 34.4%
2. NS command - no next screen 24.9%
3. FIND command with invalid index name 17.6%
4. PS command - no previous screen 5.1%
5. Valid command at an inappropriate time 2.9%
6. Search term missing from search command 1.6%
7. DISPLAY command contains invalid word 1.5%
8. DISPLAY command - no FIND results 1.3%
9. 790 1.1%
10. 754 0.7%
11. All others 8.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 26.8%
2. LOCATE (ARTICLE DBS) 24.6%
3. INDEXES 6.5%
4. Unrecognized term 6.5%
5. FIND 5.8%
6. MAGS DATABASE 5.1%
7. COMMANDS 5.1%
8. LOCATIONS 3.6%
9. ADDON SEARCH 2.2%
10. NEWS DATABASE 1.4%
11. All others 12.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.2%
2. First word of command is invalid 20.3%
3. FIND command with invalid index name 16.0%
4. DISPLAY command - middle of >1 screen 6.3%
5. FIND command with zero results 5.4%
6. NS command - no next screen 4.9%
7. DISPLAY command-complete in one screen 4.3%
8. DISPLAY command-first of >1 screen 3.7%
9. FIND command retrieves >1 book 3.2%
10. DISPLAY command - last of >1 screen 2.3%
11. All others 10.3%
Ten most frequent SHOW requests:
1. SEARCH 41.2%
2. IAC NEWS 23.5%
3. SETTINGS (IAC DBS) 17.6%
4. HISTORY 11.8%
5. GLOSSARY 5.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)