MELVYL IAC DATABASES TELNET STATISTICS
Time period: 01/12/02 through 01/18/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 42 177 219
Davis 93 1 94
Irvine 56 0 56
Los Angeles 5 51 56
Riverside 12 28 40
San Diego 19 21 40
San Francisco 10 0 10
Santa Barbara 17 22 39
Santa Cruz 14 32 46
LBL 0 12 12
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 4 15 19
Stanford 2
Other-Network UC n/a 68 68
_______ ______ _____
272 428 702
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 12 52 562
2-4 a.m. 5 15 174
4-6 a.m. 2 11 313
6-8 a.m. 8 37 168
8-10 a.m. 79 187 1,657
10-12 a.m. 147 352 4,653
12-2 p.m. 116 292 3,374
2-4 p.m. 161 395 4,616
4-6 p.m. 98 218 3,928
6-8 p.m. 37 119 1,043
8-10 p.m. 23 49 899
10-12 p.m. 14 44 464
__________ __________ __________ _________________
Total: 702 1,771 21,851
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 80 496 576
Davis 139 4 143
Irvine 183 0 183
Los Angeles 13 192 205
Riverside 33 67 100
San Diego 59 41 100
San Francisco 33 0 33
Santa Barbara 27 77 104
Santa Cruz 27 74 101
LBL 0 25 25
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 9 46 55
Stanford 5
Other-Network UC n/a 139 139
_______ ______ _____
603 1,163 1,771
Number of FIND commands by database
MAGS database 1,613
NEWS database 109
COMP database 49
Total number of FIND commands 1,771
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,832 8,623 10,455
Davis 1,549 96 1,645
Irvine 983 0 983
Los Angeles 92 2,511 2,603
Riverside 206 685 891
San Diego 194 761 955
San Francisco 266 0 266
Santa Barbara 372 683 1,055
Santa Cruz 418 632 1,050
LBL 0 206 206
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 34 452 486
Stanford 7
Other-Network UC n/a 1,206 1,206
_______ ______ _____
5,946 15,860 21,813
Number of Records Displayed by database:
MAGS database 20,321
NEWS database 840
COMP database 690
Total number of Records Displayed 21,813
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.7%
Percent of NEWS sessions 7.5%
Percent of COMP sessions 3.7%
Percent of searches done in the MAGS database 91.1%
Percent of searches done in the NEWS database 6.2%
Percent of searches done in the COMP database 2.8%
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 1.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:20
Average session length (minutes:seconds) 13:23
Longest session recorded (minutes:seconds) 334:52
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 589.3
Retrievals per search - standard deviation 4360.5
Percent of searches completed with 0 results 26.9%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 61.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,511 27.5%
DISPLAY (excluding automatic displays) 2,167 39.4%
HELP 122 2.2%
EXPLAIN 54 1.0%
SET/RESET 223 4.1%
SHOW 7 0.1%
ADD ON (AND, OR, AND NOT) 102 1.9%
LOGON or LOGOFF 848 15.4%
COMMENT 0 0.0%
SAVE 148 2.7%
USE 0 0.0%
OTHER 317 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 433 27.0% 105 24.2% 14 79.0 309.8
TITLE WORD 368 23.0% 117 31.8% 12 405.4 2688.9
EXACT TITLE 35 2.2% 17 48.6% 6 35.9 92.9
JOURNAL 104 6.5% 45 43.3% 800 5317.2 12507.2
EXACT JOURNAL 49 3.1% 23 46.9% 749 4903.0 17182.3
SUBJECT 235 14.7% 75 31.9% 12 390.1 1990.2
EXACT SUBJECT 6 0.4% 0 0.0% 77 101.8 109.8
KEYWORD 281 17.5% 43 15.3% 26 525.0 2659.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.2% 0 0.0% 5 13.5 20.5
DATE 24 1.5% 3 12.5% 41 77.0 121.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 37 2.3% 5 13.5% 9 451.7 2332.0
EXACT PE 10 0.6% 0 0.0% 3 132.0 399.2
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 17 1.1% 3 17.6% 64 1141.2 3630.4
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 100 6.7% 30 30.0% 10 642.0 3261.1
Single 1,402 93.3% 376 26.8% 18 683.0 4568.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
SHORT 60.2%
LONG 1.9%
FIELDS 1.5%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 31.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:13
Average session length (minutes:seconds) 11:00
Longest session recorded (minutes:seconds) 102:13
Average number of searches completed per session 1.8
Retrievals per search - median 9.5
Retrievals per search - average 5059.3
Retrievals per search - standard deviation 23560
Percent of searches completed with 0 results 25.0%
Percent of searches entered that are long 6.1%
Percent of long searches completed
(includes partial results) 66.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 42 22.6%
DISPLAY (excluding automatic displays) 64 34.4%
HELP 2 1.1%
EXPLAIN 4 2.2%
SET/RESET 10 5.4%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 7 3.8%
LOGON or LOGOFF 35 18.8%
COMMENT 0 0.0%
SAVE 12 6.5%
USE 0 0.0%
OTHER 10 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 6 13.0% 3 50.0% 9 18.3 17.0
TITLE WORD 12 26.1% 6 50.0% 16 21.7 25.2
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 4 8.7% 1 25.0% 43,586 70538.0 77962.1
EXACT JOURNAL 1 2.2% 0 0.0% 12,195 12195.0 0.0
SUBJECT 4 8.7% 0 0.0% 298 795.5 1156.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 14 30.4% 2 14.3% 35 995.0 2283.0
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 6.5% 0 0.0% 53 88.0 108.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 2.2% 0 0.0% 2 2.0 0.0
EXACT PE 1 2.2% 0 0.0% 7 7.0 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 5 12.2% 1 20.0% 60 82.8 89.5
Single 36 87.8% 10 27.8% 32 9181.8 31695.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 17.5%
SHORT 46.5%
LONG 2.6%
FIELDS 1.8%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 29.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 472
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 18
displays or when any of these paging options is set.
TEXT included with MAIL commands 88
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:30
Average session length (minutes:seconds) 10:32
Longest session recorded (minutes:seconds) 53:16
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 522.9
Retrievals per search - standard deviation 3081.3
Percent of searches completed with 0 results 43.1%
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 99 30.8%
DISPLAY (excluding automatic displays) 64 19.9%
HELP 22 6.9%
EXPLAIN 8 2.5%
SET/RESET 20 6.2%
SHOW 6 1.9%
ADD ON (AND, OR, AND NOT) 10 3.1%
LOGON or LOGOFF 71 22.1%
COMMENT 0 0.0%
SAVE 1 0.3%
USE 0 0.0%
OTHER 20 6.2%
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 13 11.2% 8 61.5% 26 428.4 911.7
TITLE WORD 33 28.4% 18 54.5% 23 89.4 132.3
EXACT TITLE 1 0.9% 0 0.0% 3,056 3056.0 0.0
JOURNAL 5 4.3% 3 60.0% 7 6.5 4.9
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 15 12.9% 8 53.3% 16 243.0 605.9
EXACT SUBJECT 3 2.6% 2 66.7% 2 2.0 0.0
KEYWORD 37 31.9% 12 32.4% 137 1934.3 6274.9
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 9 7.8% 4 44.4% 6 31.4 56.3
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 14 14.1% 8 57.1% 8 34.7 51.0
Single 85 85.9% 38 44.7% 27 1198.7 4633.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.8%
SHORT 38.6%
LONG 6.1%
FIELDS 5.3%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 46.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 9.6%
Ten most frequent errors:
1. First word of command is invalid 31.1%
2. NS command - no next screen 27.3%
3. FIND command with invalid index name 12.6%
4. PS command - no previous screen 4.2%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.4%
7. Search term missing from search command 2.4%
8. Command contains escape or arrow key 2.4%
9. 1281 1.6%
10. DISPLAY command - no FIND results 1.4%
11. All others 11.0%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.8%
2. INDEXES 13.6%
3. LOCATE (ARTICLE DBS) 10.6%
4. COMMANDS 7.6%
5. FIND 6.1%
6. DISPLAYS (IAC DBS) 4.5%
7. Unrecognized term 4.5%
8. MAGS DATABASE 3.0%
9. NEWS DATABASE 3.0%
10. DATES 3.0%
11. All others 18.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 19.8%
2. First word of command is invalid 17.5%
3. FIND command with invalid index name 13.2%
4. FIND command with zero results 6.1%
5. DISPLAY command-first of >1 screen 6.1%
6. DISPLAY command - middle of >1 screen 3.8%
7. FIND command retrieves >1 book 2.8%
8. DISPLAY command-complete in one screen 2.8%
9. NS command - no next screen 2.4%
10. PS command - no previous screen 2.4%
11. All others 23.1%
Ten most frequent SHOW requests:
1. SEARCH 41.7%
2. IAC NEWS 25.0%
3. HISTORY 25.0%
4. LOCATION 8.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)