MELVYL IAC DATABASES TELNET STATISTICS
Time period: 10/01/00 through 10/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,029 2,067 3,096
Davis 1,145 77 1,222
Irvine 1,023 0 1,023
Los Angeles 85 706 791
Riverside 431 149 580
San Diego 196 179 375
San Francisco 308 0 308
Santa Barbara 459 221 680
Santa Cruz 582 225 807
LBL 0 56 56
LLL 0 17 17
Los Alamos n/a 11 11
Other - UC 7 351 358
Stanford 285
Other-Network UC n/a 745 745
_______ ______ _____
5,265 4,804 10,354
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 169 475 7,244
2-4 a.m. 34 97 1,413
4-6 a.m. 61 170 2,280
6-8 a.m. 137 485 6,921
8-10 a.m. 820 2,346 26,183
10-12 a.m. 1,564 4,349 48,354
12-2 p.m. 1,898 5,422 59,989
2-4 p.m. 2,267 6,506 67,538
4-6 p.m. 1,562 4,697 56,633
6-8 p.m. 714 2,241 23,664
8-10 p.m. 689 2,017 22,102
10-12 p.m. 440 1,361 19,447
__________ __________ __________ _________________
Total: 10,355 30,166 341,768
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,198 5,800 8,998
Davis 2,878 197 3,075
Irvine 2,996 0 2,996
Los Angeles 254 2,109 2,363
Riverside 1,269 395 1,664
San Diego 556 389 945
San Francisco 749 0 749
Santa Barbara 1,389 676 2,065
Santa Cruz 1,791 637 2,428
LBL 0 126 126
LLL 0 36 36
Los Alamos n/a 35 35
Other - UC 18 1,082 1,100
Stanford 860
Other-Network UC n/a 2,724 2,724
_______ ______ _____
15,098 14,206 30,164
Number of FIND commands by database
MAGS database 26,671
NEWS database 1,897
COMP database 1,598
Total number of FIND commands 30,164
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 34,412 72,142 106,554
Davis 27,025 2,609 29,634
Irvine 30,870 0 30,870
Los Angeles 2,127 28,342 30,469
Riverside 15,611 3,823 19,434
San Diego 4,865 8,363 13,228
San Francisco 8,272 0 8,272
Santa Barbara 10,614 6,854 17,468
Santa Cruz 13,405 5,460 18,865
LBL 0 1,430 1,430
LLL 0 870 870
Los Alamos n/a 226 226
Other - UC 141 14,047 14,188
Stanford 1,349
Other-Network UC n/a 41,505 41,505
_______ ______ _____
147,342 185,671 334,362
Number of Records Displayed by database:
MAGS database 308,484
NEWS database 14,986
COMP database 18,298
Total number of Records Displayed 334,362
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.7%
Percent of NEWS sessions 8.3%
Percent of COMP sessions 5.0%
Percent of searches done in the MAGS database 88.4%
Percent of searches done in the NEWS database 6.3%
Percent of searches done in the COMP database 5.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 3.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:16
Average session length (minutes:seconds) 11:31
Longest session recorded (minutes:seconds) 681:19
Average number of searches completed per session 2.9
Retrievals per search - median 5.0
Retrievals per search - average 594.0
Retrievals per search - standard deviation 6695.4
Percent of searches completed with 0 results 30.8%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 52.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 25,256 28.0%
DISPLAY (excluding automatic displays) 35,047 38.8%
HELP 3,467 3.8%
EXPLAIN 2,310 2.6%
SET/RESET 2,866 3.2%
SHOW 363 0.4%
ADD ON (AND, OR, AND NOT) 1,415 1.6%
LOGON or LOGOFF 12,838 14.2%
COMMENT 1 0.0%
SAVE 1,746 1.9%
USE 21 0.0%
OTHER 4,887 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 4,533 17.3% 1,285 28.3% 10 75.4 328.3
TITLE WORD 5,324 20.3% 1,673 31.4% 14 692.7 13271.0
EXACT TITLE 584 2.2% 295 50.5% 3 78.6 288.9
JOURNAL 1,287 4.9% 681 52.9% 1,248 6809.5 17404.9
EXACT JOURNAL 560 2.1% 256 45.7% 887 4965.5 10537.5
SUBJECT 5,682 21.7% 2,122 37.3% 34 362.3 1790.7
EXACT SUBJECT 273 1.0% 102 37.4% 49 393.7 1245.7
KEYWORD 6,622 25.3% 1,404 21.2% 27 944.5 6947.2
SUBFILE 15 0.1% 8 53.3% 150 4955.0 12792.8
PUBLICATION TYPE 69 0.3% 16 23.2% 14 483.5 2211.1
DATE 300 1.1% 74 24.7% 13 102.1 384.2
ADDED 10 0.0% 1 10.0% 48,739 40983.2 12945.3
PERIODICAL 542 2.1% 103 19.0% 9 134.1 870.5
EXACT PE 152 0.6% 26 17.1% 5 166.1 1404.3
RPE 1 0.0% 1 100% 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 218 0.8% 71 32.6% 243 2760.7 5543.3
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 1,100 4.4% 363 33.0% 10 638.6 2885.4
Single 23,919 95.6% 7,371 30.8% 21 889.0 8388.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 63.0%
LONG 1.6%
FIELDS 1.1%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 30.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:22
Average session length (minutes:seconds) 10:00
Longest session recorded (minutes:seconds) 79:24
Average number of searches completed per session 3.1
Retrievals per search - median 11.0
Retrievals per search - average 915.0
Retrievals per search - standard deviation 15920
Percent of searches completed with 0 results 29.7%
Percent of searches entered that are long 2.8%
Percent of long searches completed
(includes partial results) 57.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,461 28.1%
DISPLAY (excluding automatic displays) 1,997 38.4%
HELP 148 2.8%
EXPLAIN 194 3.7%
SET/RESET 147 2.8%
SHOW 34 0.7%
ADD ON (AND, OR, AND NOT) 137 2.6%
LOGON or LOGOFF 749 14.4%
COMMENT 0 0.0%
SAVE 55 1.1%
USE 0 0.0%
OTHER 276 5.3%
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 162 10.6% 82 50.6% 5 46.2 148.0
TITLE WORD 351 22.9% 102 29.1% 28 556.2 3430.4
EXACT TITLE 27 1.8% 16 59.3% 7 40.5 83.6
JOURNAL 34 2.2% 21 61.8% 2,274 2090.8 2385.8
EXACT JOURNAL 18 1.2% 7 38.9% 3,698 6864.5 7470.7
SUBJECT 290 18.9% 105 36.2% 61 500.0 1611.3
EXACT SUBJECT 39 2.5% 13 33.3% 90 442.6 1090.4
KEYWORD 557 36.4% 94 16.9% 187 2359.8 29189.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.1% 0 0.0% 1,293 1292.5 1823.6
DATE 18 1.2% 3 16.7% 73 216.5 290.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 11 0.7% 4 36.4% 7 407.6 950.3
EXACT PE 2 0.1% 1 50.0% 1 1.0 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 21 1.4% 10 47.6% 4 40.9 68.6
By number of indexes:
Multiple 81 5.6% 18 22.2% 51 298.5 502.8
Single 1,362 94.4% 421 30.9% 59 1497.7 20598.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 59.3%
LONG 1.9%
FIELDS 2.0%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 32.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 6,978
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 381
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,328
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:30
Average session length (minutes:seconds) 8:23
Longest session recorded (minutes:seconds) 263:08
Average number of searches completed per session 2.2
Retrievals per search - median 2.0
Retrievals per search - average 371.0
Retrievals per search - standard deviation 3146.9
Percent of searches completed with 0 results 39.2%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 56.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,830 32.9%
DISPLAY (excluding automatic displays) 1,216 21.9%
HELP 299 5.4%
EXPLAIN 217 3.9%
SET/RESET 333 6.0%
SHOW 35 0.6%
ADD ON (AND, OR, AND NOT) 67 1.2%
LOGON or LOGOFF 1,147 20.6%
COMMENT 0 0.0%
SAVE 148 2.7%
USE 2 0.0%
OTHER 263 4.7%
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 131 6.7% 57 43.5% 19 237.5 526.4
TITLE WORD 447 22.8% 168 37.6% 18 778.7 7491.5
EXACT TITLE 42 2.1% 28 66.7% 70 238.3 529.0
JOURNAL 26 1.3% 16 61.5% 52 1718.9 4717.3
EXACT JOURNAL 19 1.0% 7 36.8% 56 401.3 647.9
SUBJECT 575 29.3% 236 41.0% 42 758.1 2026.9
EXACT SUBJECT 33 1.7% 21 63.6% 736 1106.2 1138.3
KEYWORD 619 31.6% 212 34.2% 12 400.2 1738.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.3% 2 33.3% 9 59.5 104.4
DATE 50 2.6% 16 32.0% 9 62.8 162.1
ADDED 1 0.1% 1 100% 0 0.0 0.0
PERIODICAL 10 0.5% 2 20.0% 13 745.9 2065.7
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 1 0.1% 0 0.0% 146 146.0 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 142 7.8% 54 38.0% 12 300.0 1625.7
Single 1,668 92.2% 656 39.3% 25 641.2 4229.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 48.5%
LONG 2.7%
FIELDS 1.0%
PERIODICALS 0.3%
COMMENTS 0.0%
Other 43.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.5%
Ten most frequent errors:
1. First word of command is invalid 38.6%
2. NS command - no next screen 21.9%
3. FIND command with invalid index name 13.8%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 3.4%
6. Valid command at an inappropriate time 2.6%
7. Search term missing from search command 2.4%
8. DISPLAY command - no FIND results 1.2%
9. MAIL command issued w/o email address 0.8%
10. Command contains escape or arrow key 0.8%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.8%
2. LOCATE (ARTICLE DBS) 17.7%
3. FIND 8.8%
4. COMMANDS 8.4%
5. INDEXES 6.6%
6. MAGS DATABASE 5.7%
7. Unrecognized term 5.0%
8. DISPLAYS (IAC DBS) 3.1%
9. ADDON SEARCH 1.9%
10. MAIL 1.9%
11. All others 15.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.2%
2. First word of command is invalid 19.7%
3. FIND command with invalid index name 11.8%
4. FIND command with zero results 7.0%
5. DISPLAY command-first of >1 screen 5.3%
6. DISPLAY command - middle of >1 screen 4.5%
7. DISPLAY command-complete in one screen 4.3%
8. FIND command retrieves >1 book 3.1%
9. NS command - no next screen 2.4%
10. PS command - no previous screen 2.1%
11. All others 15.7%
Ten most frequent SHOW requests:
1. SEARCH 38.0%
2. HISTORY 33.8%
3. MAIL STATUS 6.8%
4. SYSTEM NEWS 4.9%
5. GLOSSARY 4.6%
6. IAC NEWS 2.7%
7. SETTINGS (IAC DBS) 2.4%
8. MAIL SETTINGS 1.5%
9. LIBRARY NEWS 1.2%
10. DATABASES 1.2%
11. All others 2.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)