MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/01/00 through 04/30/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,138 2,802 4,940
Davis 1,199 62 1,261
Irvine 1,845 0 1,845
Los Angeles 131 830 961
Riverside 610 109 719
San Diego 275 181 456
San Francisco 301 0 301
Santa Barbara 528 356 884
Santa Cruz 1,035 200 1,235
LBL 0 96 96
LLL 0 9 9
Los Alamos n/a 14 14
Other - UC 63 631 694
Stanford 374
Other-Network UC n/a 885 885
_______ ______ _____
8,125 6,175 14,674
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 255 1,075 16,189
2-4 a.m. 80 263 3,964
4-6 a.m. 45 145 1,322
6-8 a.m. 121 291 3,122
8-10 a.m. 977 2,348 25,087
10-12 a.m. 2,066 6,116 65,292
12-2 p.m. 2,642 8,204 92,494
2-4 p.m. 3,231 9,589 99,894
4-6 p.m. 2,163 6,782 90,231
6-8 p.m. 1,254 4,156 51,895
8-10 p.m. 1,167 3,954 50,062
10-12 p.m. 673 2,681 36,107
__________ __________ __________ _________________
Total: 14,674 45,604 535,659
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 6,806 8,074 14,880
Davis 3,374 161 3,535
Irvine 5,321 0 5,321
Los Angeles 435 2,592 3,027
Riverside 1,846 324 2,170
San Diego 1,013 465 1,478
San Francisco 774 0 774
Santa Barbara 1,961 1,011 2,972
Santa Cruz 3,391 503 3,894
LBL 0 276 276
LLL 0 22 22
Los Alamos n/a 47 47
Other - UC 111 1,826 1,937
Stanford 1,421
Other-Network UC n/a 3,850 3,850
_______ ______ _____
25,032 19,151 45,604
Number of FIND commands by database
MAGS database 40,378
NEWS database 4,128
COMP database 1,098
Total number of FIND commands 45,604
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 80,949 106,527 187,476
Davis 35,982 733 36,715
Irvine 50,592 0 50,592
Los Angeles 6,142 36,961 43,103
Riverside 14,448 3,647 18,095
San Diego 7,612 5,838 13,450
San Francisco 9,972 0 9,972
Santa Barbara 17,021 11,526 28,547
Santa Cruz 32,031 5,284 37,315
LBL 0 3,424 3,424
LLL 0 71 71
Los Alamos n/a 342 342
Other - UC 2,524 26,569 29,093
Stanford 1,997
Other-Network UC n/a 63,487 63,487
_______ ______ _____
257,273 264,409 523,679
Number of Records Displayed by database:
MAGS database 480,592
NEWS database 38,219
COMP database 16,848
Total number of Records Displayed 523,679
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.0%
Percent of NEWS sessions 11.1%
Percent of COMP sessions 2.9%
Percent of searches done in the MAGS database 88.5%
Percent of searches done in the NEWS database 9.1%
Percent of searches done in the COMP database 2.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 4.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:28
Average session length (minutes:seconds) 12:04
Longest session recorded (minutes:seconds) 668:44
Average number of searches completed per session 3.2
Retrievals per search - median 5.0
Retrievals per search - average 527.8
Retrievals per search - standard deviation 4748.9
Percent of searches completed with 0 results 30.7%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 57.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 38,080 27.4%
DISPLAY (excluding automatic displays) 56,659 40.8%
HELP 4,838 3.5%
EXPLAIN 3,507 2.5%
SET/RESET 3,793 2.7%
SHOW 635 0.5%
ADD ON (AND, OR, AND NOT) 2,298 1.7%
LOGON or LOGOFF 18,448 13.3%
COMMENT 3 0.0%
SAVE 2,331 1.7%
USE 17 0.0%
OTHER 8,303 6.0%
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 6,110 15.5% 1,721 28.2% 10 64.9 251.3
TITLE WORD 7,518 19.0% 2,336 31.1% 13 527.6 3576.6
EXACT TITLE 839 2.1% 362 43.1% 2 61.0 318.6
JOURNAL 1,819 4.6% 962 52.9% 894 5392.1 14051.6
EXACT JOURNAL 1,032 2.6% 450 43.6% 805 3581.8 8416.0
SUBJECT 9,664 24.5% 3,847 39.8% 37 338.1 1472.9
EXACT SUBJECT 378 1.0% 171 45.2% 59 269.0 530.2
KEYWORD 10,499 26.6% 2,028 19.3% 28 921.2 7834.6
SUBFILE 7 0.0% 0 0.0% 14 322.6 524.1
PUBLICATION TYPE 90 0.2% 28 31.1% 14 152.6 554.8
DATE 484 1.2% 130 26.9% 16 175.3 724.9
ADDED 12 0.0% 0 0.0% 59,917 51741.0 29268.6
PERIODICAL 520 1.3% 92 17.7% 11 282.6 1419.1
EXACT PE 290 0.7% 41 14.1% 4 40.4 149.3
RPE 1 0.0% 0 0.0% 6 6.0 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 233 0.6% 58 24.9% 112 2223.4 7027.6
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 1,632 4.3% 550 33.7% 10 272.6 1335.1
Single 36,144 95.7% 11,097 30.7% 22 806.3 5937.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.5%
SHORT 66.1%
LONG 1.1%
FIELDS 0.7%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 29.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:49
Average session length (minutes:seconds) 8:48
Longest session recorded (minutes:seconds) 91:52
Average number of searches completed per session 2.5
Retrievals per search - median 5.0
Retrievals per search - average 977.5
Retrievals per search - standard deviation 6503.6
Percent of searches completed with 0 results 35.1%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 47.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 973 25.2%
DISPLAY (excluding automatic displays) 1,364 35.4%
HELP 153 4.0%
EXPLAIN 103 2.7%
SET/RESET 140 3.6%
SHOW 14 0.4%
ADD ON (AND, OR, AND NOT) 125 3.2%
LOGON or LOGOFF 606 15.7%
COMMENT 1 0.0%
SAVE 142 3.7%
USE 0 0.0%
OTHER 235 6.1%
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 115 11.4% 54 47.0% 9 58.1 124.6
TITLE WORD 286 28.4% 102 35.7% 25 438.8 3652.4
EXACT TITLE 10 1.0% 7 70.0% 3 2.3 1.2
JOURNAL 47 4.7% 21 44.7% 737 10292.1 24956.8
EXACT JOURNAL 16 1.6% 8 50.0% 18,436 30057.3 33717.9
SUBJECT 131 13.0% 65 49.6% 44 747.4 2594.5
EXACT SUBJECT 7 0.7% 3 42.9% 807 1462.8 1984.7
KEYWORD 345 34.3% 76 22.0% 56 1396.7 6017.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.5% 3 60.0% 2 2.0 0.0
DATE 20 2.0% 4 20.0% 29 138.3 229.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 21 2.1% 9 42.9% 2 227.1 730.2
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 4 0.4% 2 50.0% 245 245.0 345.1
By number of indexes:
Multiple 46 4.8% 15 32.6% 23 126.8 221.1
Single 914 95.2% 324 35.4% 38 1729.3 8736.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
SHORT 64.0%
LONG 1.7%
FIELDS 1.4%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 28.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 10,682
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 588
displays or when any of these paging options is set.
TEXT included with MAIL commands 2,550
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:01
Average session length (minutes:seconds) 9:13
Longest session recorded (minutes:seconds) 319:55
Average number of searches completed per session 2.5
Retrievals per search - median 3.0
Retrievals per search - average 1162.8
Retrievals per search - standard deviation 28342
Percent of searches completed with 0 results 37.1%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 48.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,890 33.3%
DISPLAY (excluding automatic displays) 2,903 24.8%
HELP 569 4.9%
EXPLAIN 390 3.3%
SET/RESET 544 4.7%
SHOW 66 0.6%
ADD ON (AND, OR, AND NOT) 238 2.0%
LOGON or LOGOFF 2,295 19.6%
COMMENT 1 0.0%
SAVE 196 1.7%
USE 2 0.0%
OTHER 590 5.0%
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 245 6.0% 107 43.7% 46 305.9 524.1
TITLE WORD 830 20.3% 259 31.2% 14 465.1 2119.3
EXACT TITLE 54 1.3% 31 57.4% 2 25.3 75.1
JOURNAL 59 1.4% 44 74.6% 833 192406 436397
EXACT JOURNAL 68 1.7% 24 35.3% 18 567.3 1723.3
SUBJECT 1,504 36.9% 655 43.5% 38 471.9 1463.6
EXACT SUBJECT 61 1.5% 29 47.5% 61 376.2 792.4
KEYWORD 1,142 28.0% 336 29.4% 25 1230.1 8022.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.2% 1 12.5% 2 7.4 12.8
DATE 79 1.9% 24 30.4% 12 187.5 567.9
ADDED 4 0.1% 0 0.0% 16,840 16840.0 0.0
PERIODICAL 10 0.2% 0 0.0% 25 85.9 105.0
EXACT PE 4 0.1% 1 25.0% 5 84.0 139.4
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 12 0.3% 3 25.0% 467 4159.9 5031.7
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 203 5.3% 57 28.1% 12 301.4 1063.9
Single 3,643 94.7% 1,388 38.1% 27 2060.8 38094.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 50.0%
LONG 3.3%
FIELDS 1.1%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 42.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.0%
Ten most frequent errors:
1. First word of command is invalid 37.9%
2. NS command - no next screen 22.4%
3. FIND command with invalid index name 12.1%
4. PS command - no previous screen 5.5%
5. DISPLAY command contains invalid word 3.3%
6. Valid command at an inappropriate time 2.6%
7. Search term missing from search command 2.0%
8. MAIL command issued w/o email address 1.0%
9. DISPLAY command - no FIND results 1.0%
10. DISPLAY command-record numbers too large 0.8%
11. All others 11.4%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 22.5%
2. GUIDE 20.5%
3. FIND 9.9%
4. COMMANDS 7.5%
5. INDEXES 7.2%
6. MAGS DATABASE 4.8%
7. Unrecognized term 4.5%
8. DISPLAYS (IAC DBS) 3.7%
9. ADDON SEARCH 2.8%
10. MAIL 1.9%
11. All others 14.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.8%
2. First word of command is invalid 19.3%
3. FIND command with invalid index name 10.3%
4. FIND command with zero results 7.1%
5. DISPLAY command - middle of >1 screen 5.5%
6. DISPLAY command-complete in one screen 5.4%
7. DISPLAY command-first of >1 screen 5.3%
8. FIND command retrieves >1 book 3.2%
9. NS command - no next screen 3.0%
10. PS command - no previous screen 2.4%
11. All others 15.9%
Ten most frequent SHOW requests:
1. SEARCH 37.9%
2. HISTORY 35.8%
3. MAIL STATUS 6.6%
4. IAC NEWS 3.9%
5. GLOSSARY 3.6%
6. SETTINGS (IAC DBS) 3.5%
7. SYSTEM NEWS 3.3%
8. MAIL SETTINGS 2.9%
9. LIBRARY NEWS 0.7%
10. SYSTEM1 NEWS 0.3%
11. All others 1.4%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)