MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/01/99 through 12/31/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 799 1,737 2,536
Davis 1,569 77 1,646
Irvine 1,318 0 1,318
Los Angeles 197 1,282 1,479
Riverside 400 89 489
San Diego 258 326 584
San Francisco 304 0 304
Santa Barbara 646 494 1,140
Santa Cruz 832 400 1,232
LBL 0 91 91
LLL 0 32 32
Los Alamos n/a 1 1
Other - UC 48 271 319
Stanford 297
Other-Network UC n/a 764 764
_______ ______ _____
6,371 5,564 12,232
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 256 1,074 13,413
2-4 a.m. 101 442 5,690
4-6 a.m. 65 177 2,595
6-8 a.m. 144 393 4,718
8-10 a.m. 891 2,579 36,510
10-12 a.m. 1,878 5,163 57,880
12-2 p.m. 2,172 6,603 69,620
2-4 p.m. 2,606 8,254 100,095
4-6 p.m. 1,881 5,816 84,975
6-8 p.m. 906 3,053 39,193
8-10 p.m. 805 2,591 30,304
10-12 p.m. 527 1,834 23,207
__________ __________ __________ _________________
Total: 12,232 37,979 468,200
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,476 5,189 7,665
Davis 4,637 289 4,926
Irvine 4,348 0 4,348
Los Angeles 593 3,503 4,096
Riverside 1,069 239 1,308
San Diego 882 974 1,856
San Francisco 892 0 892
Santa Barbara 2,067 1,570 3,637
Santa Cruz 2,866 1,111 3,977
LBL 0 205 205
LLL 0 97 97
Los Alamos n/a 2 2
Other - UC 87 875 962
Stanford 1,122
Other-Network UC n/a 2,886 2,886
_______ ______ _____
19,917 16,940 37,979
Number of FIND commands by database
MAGS database 33,985
NEWS database 2,668
COMP database 1,326
Total number of FIND commands 37,979
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 30,176 57,369 87,545
Davis 40,606 1,446 42,052
Irvine 67,536 0 67,536
Los Angeles 8,722 54,382 63,104
Riverside 9,594 2,096 11,690
San Diego 7,379 22,344 29,723
San Francisco 10,882 0 10,882
Santa Barbara 24,181 19,724 43,905
Santa Cruz 29,286 11,874 41,160
LBL 0 2,312 2,312
LLL 0 847 847
Los Alamos n/a 0 0
Other - UC 1,401 11,643 13,044
Stanford 1,848
Other-Network UC n/a 41,385 41,385
_______ ______ _____
229,763 225,422 457,033
Number of Records Displayed by database:
MAGS database 424,798
NEWS database 18,943
COMP database 24,459
Total number of Records Displayed 457,033
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.2%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 3.5%
Percent of searches done in the MAGS database 89.5%
Percent of searches done in the NEWS database 7.0%
Percent of searches done in the COMP database 3.5%
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 4.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:08
Average session length (minutes:seconds) 12:45
Longest session recorded (minutes:seconds) 572:41
Average number of searches completed per session 3.2
Retrievals per search - median 6.0
Retrievals per search - average 608.7
Retrievals per search - standard deviation 8152.8
Percent of searches completed with 0 results 29.3%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 51.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 31,781 27.3%
DISPLAY (excluding automatic displays) 48,803 41.9%
HELP 3,274 2.8%
EXPLAIN 2,463 2.1%
SET/RESET 3,544 3.0%
SHOW 598 0.5%
ADD ON (AND, OR, AND NOT) 2,204 1.9%
LOGON or LOGOFF 15,015 12.9%
COMMENT 3 0.0%
SAVE 2,213 1.9%
USE 24 0.0%
OTHER 6,674 5.7%
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 6,438 19.6% 1,759 27.3% 9 72.6 326.9
TITLE WORD 5,998 18.2% 1,741 29.0% 12 436.0 2528.5
EXACT TITLE 824 2.5% 420 51.0% 4 113.6 386.1
JOURNAL 1,520 4.6% 686 45.1% 897 6408.5 18134.3
EXACT JOURNAL 741 2.3% 339 45.7% 874 5116.7 10277.8
SUBJECT 6,556 19.9% 2,460 37.5% 35 310.0 1558.2
EXACT SUBJECT 375 1.1% 150 40.0% 24 457.5 1404.2
KEYWORD 8,988 27.3% 1,887 21.0% 29 1205.2 15996.6
SUBFILE 4 0.0% 0 0.0% 21 50.0 72.0
PUBLICATION TYPE 68 0.2% 13 19.1% 13 325.8 918.8
DATE 308 0.9% 70 22.7% 26 316.7 1020.2
ADDED 11 0.0% 0 0.0% 35,188 26228.8 12636.9
PERIODICAL 466 1.4% 114 24.5% 11 234.7 1316.6
EXACT PE 301 0.9% 54 17.9% 4 42.5 165.6
RPE 1 0.0% 0 0.0% 22 22.0 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 286 0.9% 55 19.2% 505 3018.7 8978.9
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 1,309 4.2% 415 31.7% 11 855.0 5032.8
Single 30,189 95.8% 8,885 29.4% 20 901.4 10149.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 65.3%
LONG 1.8%
FIELDS 0.8%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 28.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:15
Average session length (minutes:seconds) 10:12
Longest session recorded (minutes:seconds) 79:28
Average number of searches completed per session 3.1
Retrievals per search - median 7.0
Retrievals per search - average 779.3
Retrievals per search - standard deviation 6260.1
Percent of searches completed with 0 results 30.5%
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 1,166 26.9%
DISPLAY (excluding automatic displays) 1,673 38.6%
HELP 131 3.0%
EXPLAIN 118 2.7%
SET/RESET 141 3.2%
SHOW 23 0.5%
ADD ON (AND, OR, AND NOT) 160 3.7%
LOGON or LOGOFF 616 14.2%
COMMENT 0 0.0%
SAVE 76 1.8%
USE 1 0.0%
OTHER 234 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 106 8.6% 61 57.5% 3 40.3 88.7
TITLE WORD 280 22.8% 79 28.2% 19 679.3 3311.1
EXACT TITLE 9 0.7% 8 88.9% 1 1.0 0.0
JOURNAL 34 2.8% 15 44.1% 1,896 21455.1 42571.6
EXACT JOURNAL 7 0.6% 5 71.4% 14,861 14861.0 16370.9
SUBJECT 209 17.0% 74 35.4% 44 1072.0 3711.1
EXACT SUBJECT 7 0.6% 6 85.7% 27,505 27505.0 0.0
KEYWORD 523 42.7% 136 26.0% 54 636.3 3536.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 0.4% 0 0.0% 3 139.4 228.8
DATE 38 3.1% 8 21.1% 64 127.4 258.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 0.7% 0 0.0% 3 5.4 6.4
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
By number of indexes:
Multiple 70 6.1% 14 20.0% 28 96.0 210.6
Single 1,083 93.9% 364 33.6% 36 1374.1 8406.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.6%
SHORT 57.7%
LONG 2.2%
FIELDS 1.9%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 31.0%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 9,260
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 536
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,944
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:09
Average session length (minutes:seconds) 8:23
Longest session recorded (minutes:seconds) 135:34
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 1100.9
Retrievals per search - standard deviation 31960
Percent of searches completed with 0 results 39.9%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 36.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,530 34.6%
DISPLAY (excluding automatic displays) 1,652 22.6%
HELP 299 4.1%
EXPLAIN 228 3.1%
SET/RESET 458 6.3%
SHOW 43 0.6%
ADD ON (AND, OR, AND NOT) 138 1.9%
LOGON or LOGOFF 1,485 20.3%
COMMENT 0 0.0%
SAVE 46 0.6%
USE 2 0.0%
OTHER 421 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 266 10.1% 152 57.1% 14 228.5 493.7
TITLE WORD 571 21.7% 185 32.4% 22 478.1 2592.7
EXACT TITLE 66 2.5% 34 51.5% 4 28.8 58.0
JOURNAL 42 1.6% 36 85.7% 141 328880 637239
EXACT JOURNAL 22 0.8% 13 59.1% 228 2002.1 4622.1
SUBJECT 703 26.7% 290 41.3% 39 703.6 3006.1
EXACT SUBJECT 34 1.3% 18 52.9% 22 365.6 605.5
KEYWORD 835 31.7% 294 35.2% 19 742.7 3404.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 0.3% 2 22.2% 4 5.9 6.0
DATE 57 2.2% 14 24.6% 23 149.1 483.9
ADDED 1 0.0% 1 100% 0 0.0 0.0
PERIODICAL 12 0.5% 4 33.3% 21 22.6 17.9
EXACT PE 8 0.3% 2 25.0% 9 23.5 34.6
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 6 0.2% 3 50.0% 2,852 2611.0 417.4
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 126 5.0% 44 34.9% 13 298.0 1611.8
Single 2,373 95.0% 958 40.4% 24 2025.7 43588.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.0%
SHORT 47.5%
LONG 3.0%
FIELDS 1.0%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 44.1%
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 36.1%
2. NS command - no next screen 25.9%
3. FIND command with invalid index name 10.6%
4. PS command - no previous screen 5.0%
5. DISPLAY command contains invalid word 3.8%
6. Valid command at an inappropriate time 2.8%
7. Search term missing from search command 1.7%
8. MAIL command issued w/o email address 1.1%
9. DISPLAY command-record numbers too large 1.0%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.4%
2. LOCATE (ARTICLE DBS) 18.0%
3. FIND 9.4%
4. INDEXES 7.8%
5. COMMANDS 7.5%
6. Unrecognized term 5.4%
7. MAGS DATABASE 4.2%
8. ADDON SEARCH 3.3%
9. DISPLAYS (IAC DBS) 3.0%
10. MAIL 1.9%
11. All others 17.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.0%
2. First word of command is invalid 18.6%
3. FIND command with invalid index name 9.4%
4. FIND command with zero results 7.0%
5. DISPLAY command - middle of >1 screen 5.5%
6. DISPLAY command-first of >1 screen 5.2%
7. DISPLAY command-complete in one screen 5.0%
8. FIND command retrieves >1 book 3.4%
9. NS command - no next screen 3.0%
10. PS command - no previous screen 2.0%
11. All others 16.8%
Ten most frequent SHOW requests:
1. SEARCH 43.1%
2. HISTORY 30.9%
3. MAIL STATUS 7.6%
4. GLOSSARY 4.2%
5. SETTINGS (IAC DBS) 3.6%
6. IAC NEWS 2.4%
7. SYSTEM NEWS 2.4%
8. MAIL SETTINGS 1.6%
9. LIBRARY NEWS 0.5%
10. DISPLAY 0.5%
11. All others 3.1%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)