MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/27/02 through 05/03/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 103 224 327
Davis 157 3 160
Irvine 132 0 132
Los Angeles 0 47 47
Riverside 8 3 11
San Diego 12 28 40
San Francisco 5 0 5
Santa Barbara 8 22 30
Santa Cruz 9 10 19
LBL 0 14 14
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 0 56 56
Stanford 1
Other-Network UC n/a 52 52
_______ ______ _____
434 460 895
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 15 35 529
2-4 a.m. 6 11 453
4-6 a.m. 4 10 56
6-8 a.m. 4 7 18
8-10 a.m. 60 126 2,499
10-12 a.m. 143 399 4,646
12-2 p.m. 186 507 4,099
2-4 p.m. 189 448 5,531
4-6 p.m. 175 471 4,792
6-8 p.m. 45 194 1,674
8-10 p.m. 44 102 719
10-12 p.m. 24 64 631
__________ __________ __________ _________________
Total: 895 2,374 25,647
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 304 536 840
Davis 432 3 435
Irvine 516 0 516
Los Angeles 0 89 89
Riverside 16 10 26
San Diego 14 41 55
San Francisco 4 0 4
Santa Barbara 54 32 86
Santa Cruz 23 24 47
LBL 0 29 29
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 1 110 111
Stanford 9
Other-Network UC n/a 124 124
_______ ______ _____
1,364 1,001 2,374
Number of FIND commands by database
MAGS database 2,047
NEWS database 277
COMP database 50
Total number of FIND commands 2,374
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,398 9,432 11,830
Davis 3,782 7 3,789
Irvine 1,594 0 1,594
Los Angeles 0 738 738
Riverside 68 829 897
San Diego 175 601 776
San Francisco 38 0 38
Santa Barbara 995 129 1,124
Santa Cruz 152 678 830
LBL 0 244 244
LLL 0 154 154
Los Alamos n/a 0 0
Other - UC 3 1,271 1,274
Stanford 2
Other-Network UC n/a 2,343 2,343
_______ ______ _____
9,205 16,426 25,633
Number of Records Displayed by database:
MAGS database 21,958
NEWS database 3,194
COMP database 495
Total number of Records Displayed 25,633
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.5%
Percent of NEWS sessions 12.5%
Percent of COMP sessions 2.0%
Percent of searches done in the MAGS database 86.2%
Percent of searches done in the NEWS database 11.7%
Percent of searches done in the COMP database 2.1%
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 3.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 4:41
Average session length (minutes:seconds) 13:04
Longest session recorded (minutes:seconds) 309:21
Average number of searches completed per session 2.7
Retrievals per search - median 3.0
Retrievals per search - average 328.1
Retrievals per search - standard deviation 3521.0
Percent of searches completed with 0 results 32.2%
Percent of searches entered that are long 0.9%
Percent of long searches completed
(includes partial results) 33.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,951 29.2%
DISPLAY (excluding automatic displays) 2,563 38.3%
HELP 211 3.2%
EXPLAIN 138 2.1%
SET/RESET 349 5.2%
SHOW 28 0.4%
ADD ON (AND, OR, AND NOT) 96 1.4%
LOGON or LOGOFF 915 13.7%
COMMENT 0 0.0%
SAVE 164 2.5%
USE 2 0.0%
OTHER 273 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 269 13.3% 69 25.6% 10 36.4 81.7
TITLE WORD 451 22.3% 138 30.6% 17 236.8 1012.8
EXACT TITLE 206 10.2% 67 32.5% 1 6.3 17.7
JOURNAL 48 2.4% 24 50.0% 1,086 4825.5 9795.5
EXACT JOURNAL 99 4.9% 47 47.5% 789 3265.1 7957.3
SUBJECT 426 21.1% 189 44.4% 33 373.8 906.0
EXACT SUBJECT 23 1.1% 12 52.2% 9 13.6 10.6
KEYWORD 310 15.4% 61 19.7% 18 807.1 8547.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.2% 2 50.0% 18 17.5 19.1
DATE 56 2.8% 16 28.6% 12 123.0 490.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 51 2.5% 11 21.6% 5 128.7 525.9
EXACT PE 58 2.9% 8 13.8% 4 6.4 6.0
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 17 0.8% 9 52.9% 65 150.4 186.8
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 79 4.1% 25 31.6% 12 100.0 423.9
Single 1,858 95.9% 602 32.4% 13 524.0 4468.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 62.1%
LONG 0.7%
FIELDS 1.0%
PERIODICALS 3.9%
COMMENTS 0.0%
Other 30.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:33
Average session length (minutes:seconds) 14:22
Longest session recorded (minutes:seconds) 112:53
Average number of searches completed per session 2.8
Retrievals per search - median 4.0
Retrievals per search - average 146.3
Retrievals per search - standard deviation 286.5
Percent of searches completed with 0 results 38.0%
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 50 26.0%
DISPLAY (excluding automatic displays) 61 31.8%
HELP 9 4.7%
EXPLAIN 12 6.3%
SET/RESET 7 3.6%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 29 15.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 24 12.5%
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 6 10.9% 5 83.3% 1 1.0 0.0
TITLE WORD 15 27.3% 5 33.3% 77 301.1 351.5
EXACT TITLE 1 1.8% 1 100% 0 0.0 0.0
JOURNAL 4 7.3% 3 75.0% 154 154.0 0.0
EXACT JOURNAL 1 1.8% 1 100% 0 0.0 0.0
SUBJECT 18 32.7% 6 33.3% 33 246.8 339.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 8 14.5% 0 0.0% 53 269.9 407.9
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 1 1.8% 0 0.0% 34 34.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.8% 0 0.0% 2 2.0 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 5 10.0% 2 40.0% 154 336.3 424.0
Single 45 90.0% 17 37.8% 33 225.2 331.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.3%
SHORT 55.1%
LONG 0.0%
FIELDS 1.9%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 31.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 426
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 33
displays or when any of these paging options is set.
TEXT included with MAIL commands 66
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:31
Average session length (minutes:seconds) 10:41
Longest session recorded (minutes:seconds) 72:32
Average number of searches completed per session 2.4
Retrievals per search - median 3.0
Retrievals per search - average 580.6
Retrievals per search - standard deviation 5935.0
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 263 28.9%
DISPLAY (excluding automatic displays) 185 20.3%
HELP 49 5.4%
EXPLAIN 30 3.3%
SET/RESET 68 7.5%
SHOW 6 0.7%
ADD ON (AND, OR, AND NOT) 14 1.5%
LOGON or LOGOFF 107 11.7%
COMMENT 0 0.0%
SAVE 159 17.5%
USE 1 0.1%
OTHER 29 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 18 6.4% 4 22.2% 58 385.9 763.4
TITLE WORD 73 25.9% 23 31.5% 9 2009.2 13584.3
EXACT TITLE 25 8.9% 9 36.0% 1 1.8 2.5
JOURNAL 4 1.4% 2 50.0% 136 136.0 172.5
EXACT JOURNAL 7 2.5% 0 0.0% 164 133.9 74.4
SUBJECT 91 32.3% 42 46.2% 26 515.8 2506.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 53 18.8% 12 22.6% 117 670.3 1744.4
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 3.5% 0 0.0% 4 49.1 78.3
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 1 0.4% 0 0.0% 3 3.0 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 20 7.7% 3 15.0% 14 74.1 91.3
Single 240 92.3% 86 35.8% 12 1024.5 7899.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 60.5%
LONG 0.6%
FIELDS 1.1%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 36.1%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.2%
Ten most frequent errors:
1. First word of command is invalid 35.9%
2. NS command - no next screen 21.9%
3. FIND command with invalid index name 14.7%
4. PS command - no previous screen 4.6%
5. Valid command at an inappropriate time 2.8%
6. DISPLAY command contains invalid word 2.5%
7. Search term missing from search command 1.9%
8. 790 1.9%
9. DISPLAY command-record numbers too large 1.5%
10. MAIL command issued w/o email address 1.2%
11. All others 11.1%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 32.8%
2. GUIDE 18.9%
3. FIND 8.9%
4. INDEXES 7.2%
5. COMMANDS 5.0%
6. DISPLAYS (IAC DBS) 4.4%
7. Unrecognized term 3.3%
8. MAGS DATABASE 2.8%
9. MAIL 2.2%
10. ADDON SEARCH 2.2%
11. All others 12.2%
Ten most frequent HELP situations:
1. First word of command is invalid 24.3%
2. Help requested from SET DB command 18.5%
3. FIND command with invalid index name 12.7%
4. FIND command with zero results 6.7%
5. DISPLAY command-complete in one screen 5.6%
6. DISPLAY command - middle of >1 screen 5.6%
7. DISPLAY command-first of >1 screen 5.3%
8. Valid command at an inappropriate time 2.0%
9. NS command - no next screen 2.0%
10. PS command - no previous screen 2.0%
11. All others 15.4%
Ten most frequent SHOW requests:
1. SEARCH 35.3%
2. IAC NEWS 26.5%
3. HISTORY 11.8%
4. SYSTEM NEWS 8.8%
5. MAIL STATUS 8.8%
6. GLOSSARY 2.9%
7. SYSTEM2 NEWS 2.9%
8. MAIL SETTINGS 2.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)