MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/22/01 through 12/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 5 20 25
Davis 14 1 15
Irvine 6 0 6
Los Angeles 0 10 10
Riverside 1 4 5
San Diego 1 6 7
San Francisco 6 0 6
Santa Barbara 1 8 9
Santa Cruz 0 13 13
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 4 4
Stanford 1
Other-Network UC n/a 35 35
_______ ______ _____
34 101 136
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 10 24 1,282
2-4 a.m. 3 3 82
4-6 a.m. 0 0 113
6-8 a.m. 2 5 5
8-10 a.m. 18 43 445
10-12 a.m. 29 93 1,254
12-2 p.m. 19 48 3,221
2-4 p.m. 19 49 452
4-6 p.m. 11 29 260
6-8 p.m. 16 40 672
8-10 p.m. 8 15 601
10-12 p.m. 1 7 66
__________ __________ __________ _________________
Total: 136 356 8,453
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 12 66 78
Davis 26 1 27
Irvine 6 0 6
Los Angeles 0 61 61
Riverside 1 15 16
San Diego 3 14 17
San Francisco 8 0 8
Santa Barbara 2 27 29
Santa Cruz 0 38 38
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 6 6
Stanford 1
Other-Network UC n/a 69 69
_______ ______ _____
58 297 356
Number of FIND commands by database
MAGS database 330
NEWS database 11
COMP database 15
Total number of FIND commands 356
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 637 827 1,464
Davis 157 4 161
Irvine 63 0 63
Los Angeles 0 595 595
Riverside 0 133 133
San Diego 1 2,957 2,958
San Francisco 91 0 91
Santa Barbara 18 211 229
Santa Cruz 0 434 434
LBL 0 0 0
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 190 190
Stanford 1
Other-Network UC n/a 2,132 2,132
_______ ______ _____
967 7,483 8,451
Number of Records Displayed by database:
MAGS database 4,719
NEWS database 151
COMP database 3,583
Total number of Records Displayed 8,451
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.0%
Percent of NEWS sessions 6.6%
Percent of COMP sessions 7.4%
Percent of searches done in the MAGS database 92.7%
Percent of searches done in the NEWS database 3.1%
Percent of searches done in the COMP database 4.2%
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 2.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 10:39
Average session length (minutes:seconds) 22:03
Longest session recorded (minutes:seconds) 520:03
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 1252.6
Retrievals per search - standard deviation 16847
Percent of searches completed with 0 results 27.6%
Percent of searches entered that are long 3.0%
Percent of long searches completed
(includes partial results) 30.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 309 26.2%
DISPLAY (excluding automatic displays) 516 43.7%
HELP 19 1.6%
EXPLAIN 28 2.4%
SET/RESET 56 4.7%
SHOW 1 0.1%
ADD ON (AND, OR, AND NOT) 21 1.8%
LOGON or LOGOFF 143 12.1%
COMMENT 0 0.0%
SAVE 35 3.0%
USE 0 0.0%
OTHER 53 4.5%
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 117 37.4% 28 23.9% 17 40.1 74.5
TITLE WORD 61 19.5% 20 32.8% 12 83.2 208.8
EXACT TITLE 9 2.9% 3 33.3% 2 6.2 9.0
JOURNAL 18 5.8% 12 66.7% 866 1360.3 1348.5
EXACT JOURNAL 11 3.5% 6 54.5% 2,747 16724.6 21325.2
SUBJECT 48 15.3% 11 22.9% 31 70.0 112.5
EXACT SUBJECT 2 0.6% 0 0.0% 297 296.5 417.9
KEYWORD 41 13.1% 12 29.3% 42 10379.7 55270.5
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 1 0.3% 0 0.0% 1 1.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 5 1.6% 1 20.0% 280 279.5 320.4
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 11 3.6% 6 54.5% 1 7.4 13.8
Single 291 96.4% 81 27.8% 22 1924.0 20880.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
SHORT 64.7%
LONG 4.4%
FIELDS 0.2%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 27.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:12
Average session length (minutes:seconds) 23:13
Longest session recorded (minutes:seconds) 65:19
Average number of searches completed per session 1.5
Retrievals per search - median 16.0
Retrievals per search - average 13222
Retrievals per search - standard deviation 41118
Percent of searches completed with 0 results 6.7%
Percent of searches entered that are long 6.7%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 13 9.6%
DISPLAY (excluding automatic displays) 63 46.7%
HELP 0 0.0%
EXPLAIN 3 2.2%
SET/RESET 7 5.2%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 2 1.5%
LOGON or LOGOFF 8 5.9%
COMMENT 0 0.0%
SAVE 34 25.2%
USE 0 0.0%
OTHER 5 3.7%
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 2 13.3% 0 0.0% 2 2.0 1.4
TITLE WORD 4 26.7% 0 0.0% 90 89.5 90.6
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 13.3% 0 0.0% 80,111 80111.0 109788
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 5 33.3% 0 0.0% 16 28.4 33.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 2 13.3% 1 50.0% 162 162.0 0.0
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 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 2 15.4% 0 0.0% 11 11.0 0.0
Single 11 84.6% 1 9.1% 125 16084.4 49779.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 20.6%
SHORT 65.7%
LONG 0.0%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 13.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 127
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 15
displays or when any of these paging options is set.
TEXT included with MAIL commands 9
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:02
Average session length (minutes:seconds) 6:05
Longest session recorded (minutes:seconds) 14:53
Average number of searches completed per session 1.2
Retrievals per search - median 19.0
Retrievals per search - average 50.7
Retrievals per search - standard deviation 124.0
Percent of searches completed with 0 results 18.2%
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 10 20.4%
DISPLAY (excluding automatic displays) 20 40.8%
HELP 0 0.0%
EXPLAIN 0 0.0%
SET/RESET 7 14.3%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 1 2.0%
LOGON or LOGOFF 9 18.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 2 4.1%
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 0 0.0% 0 0.0% 0 0.0 0.0
TITLE WORD 3 21.4% 1 33.3% 223 222.5 283.5
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1 7.1% 0 0.0% 7 7.0 0.0
SUBJECT 6 42.9% 0 0.0% 13 14.8 11.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 1 7.1% 1 100% 0 0.0 0.0
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 21.4% 0 0.0% 4 4.7 2.1
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
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 3 30.0% 0 0.0% 4 4.7 2.1
Single 7 70.0% 2 28.6% 28 104.0 178.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.4%
SHORT 50.0%
LONG 3.1%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 37.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 9.5%
Ten most frequent errors:
1. NS command - no next screen 37.8%
2. First word of command is invalid 25.9%
3. FIND command with invalid index name 9.1%
4. DISPLAY command contains invalid word 4.2%
5. Search term missing from search command 3.5%
6. DISPLAY command-record numbers too large 2.8%
7. D LIST command issued; no list exists 2.1%
8. Valid command at an inappropriate time 1.4%
9. Invalid SET DATABASE command issued 1.4%
10. DISPLAY command - no FIND results 1.4%
11. All others 10.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 38.7%
2. FIND 22.6%
3. COMMANDS 9.7%
4. MAIL 9.7%
5. MAGS DATABASE 3.2%
6. A014 3.2%
7. A122 3.2%
8. ABI TEXT 3.2%
9. 1617 3.2%
10. 1752 3.2%
11. All others 0.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 20.0%
2. FIND command with zero results 16.0%
3. DISPLAY command-first of >1 screen 14.0%
4. First word of command is invalid 12.0%
5. FIND command with invalid index name 8.0%
6. DISPLAY command-complete in one screen 8.0%
7. 420 6.0%
8. 15 4.0%
9. FIND command retrieves >1 book 4.0%
10. DISPLAY command - middle of >1 screen 4.0%
11. All others 4.0%
Ten most frequent SHOW requests:
1. SEARCH 100%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)