MELVYL IAC DATABASES TELNET STATISTICS
Time period: 08/01/00 through 08/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 578 1,319 1,897
Davis 611 38 649
Irvine 730 0 730
Los Angeles 74 545 619
Riverside 206 92 298
San Diego 236 230 466
San Francisco 356 0 356
Santa Barbara 156 205 361
Santa Cruz 194 114 308
LBL 0 72 72
LLL 0 34 34
Los Alamos n/a 6 6
Other - UC 18 132 150
Stanford 239
Other-Network UC n/a 461 461
_______ ______ _____
3,159 3,248 6,646
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 113 365 5,755
2-4 a.m. 42 124 2,394
4-6 a.m. 40 125 2,086
6-8 a.m. 96 266 5,530
8-10 a.m. 565 1,658 44,903
10-12 a.m. 1,240 3,248 55,361
12-2 p.m. 1,201 3,194 40,315
2-4 p.m. 1,481 4,304 67,448
4-6 p.m. 1,016 3,037 33,412
6-8 p.m. 368 1,087 12,975
8-10 p.m. 264 923 12,495
10-12 p.m. 220 722 8,893
__________ __________ __________ _________________
Total: 6,646 19,053 291,567
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,667 3,432 5,099
Davis 1,826 106 1,932
Irvine 2,493 0 2,493
Los Angeles 332 1,269 1,601
Riverside 443 327 770
San Diego 751 538 1,289
San Francisco 1,085 0 1,085
Santa Barbara 435 498 933
Santa Cruz 555 286 841
LBL 0 191 191
LLL 0 99 99
Los Alamos n/a 22 22
Other - UC 31 341 372
Stanford 730
Other-Network UC n/a 1,596 1,596
_______ ______ _____
9,618 8,705 19,053
Number of FIND commands by database
MAGS database 16,716
NEWS database 1,360
COMP database 977
Total number of FIND commands 19,053
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 21,672 45,239 66,911
Davis 21,898 2,614 24,512
Irvine 19,313 0 19,313
Los Angeles 3,096 16,311 19,407
Riverside 3,254 3,264 6,518
San Diego 7,073 65,803 72,876
San Francisco 11,948 0 11,948
Santa Barbara 4,649 6,881 11,530
Santa Cruz 5,625 2,944 8,569
LBL 0 2,369 2,369
LLL 0 851 851
Los Alamos n/a 185 185
Other - UC 593 5,441 6,034
Stanford 1,417
Other-Network UC n/a 31,696 31,696
_______ ______ _____
99,121 183,598 284,136
Number of Records Displayed by database:
MAGS database 239,487
NEWS database 9,756
COMP database 42,324
Total number of Records Displayed 284,136
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.1%
Percent of NEWS sessions 8.7%
Percent of COMP sessions 5.1%
Percent of searches done in the MAGS database 87.7%
Percent of searches done in the NEWS database 7.1%
Percent of searches done in the COMP database 5.1%
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 2.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:36
Average session length (minutes:seconds) 12:41
Longest session recorded (minutes:seconds) 1063
Average number of searches completed per session 2.9
Retrievals per search - median 5.0
Retrievals per search - average 513.9
Retrievals per search - standard deviation 4449.3
Percent of searches completed with 0 results 29.2%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 48.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 15,608 27.5%
DISPLAY (excluding automatic displays) 23,713 41.8%
HELP 1,179 2.1%
EXPLAIN 938 1.7%
SET/RESET 2,096 3.7%
SHOW 176 0.3%
ADD ON (AND, OR, AND NOT) 1,108 2.0%
LOGON or LOGOFF 7,703 13.6%
COMMENT 0 0.0%
SAVE 1,029 1.8%
USE 19 0.0%
OTHER 3,173 5.6%
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 3,602 22.1% 1,082 30.0% 9 58.4 220.1
TITLE WORD 3,879 23.8% 1,154 29.7% 11 357.3 2586.0
EXACT TITLE 338 2.1% 161 47.6% 3 61.6 292.7
JOURNAL 844 5.2% 400 47.4% 941 5463.5 14437.9
EXACT JOURNAL 433 2.7% 189 43.6% 723 3941.6 8757.8
SUBJECT 2,374 14.6% 797 33.6% 29 281.0 2052.5
EXACT SUBJECT 70 0.4% 20 28.6% 29 204.0 521.7
KEYWORD 3,870 23.7% 847 21.9% 27 845.0 7033.0
SUBFILE 12 0.1% 5 41.7% 4 25.3 35.5
PUBLICATION TYPE 34 0.2% 13 38.2% 16 383.2 986.7
DATE 150 0.9% 27 18.0% 19 199.1 764.7
ADDED 13 0.1% 2 15.4% 19,817 27735.5 23702.5
PERIODICAL 322 2.0% 56 17.4% 8 508.9 2699.8
EXACT PE 238 1.5% 49 20.6% 6 237.2 1188.3
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 127 0.8% 22 17.3% 423 3938.1 8369.2
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 779 5.0% 257 33.0% 9 468.0 1990.0
Single 14,726 95.0% 4,308 29.3% 17 764.7 5543.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 62.9%
LONG 2.2%
FIELDS 0.9%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 29.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:49
Average session length (minutes:seconds) 12:30
Longest session recorded (minutes:seconds) 343:49
Average number of searches completed per session 2.8
Retrievals per search - median 6.5
Retrievals per search - average 938.2
Retrievals per search - standard deviation 7251.7
Percent of searches completed with 0 results 32.4%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 852 23.1%
DISPLAY (excluding automatic displays) 1,640 44.4%
HELP 74 2.0%
EXPLAIN 95 2.6%
SET/RESET 123 3.3%
SHOW 12 0.3%
ADD ON (AND, OR, AND NOT) 125 3.4%
LOGON or LOGOFF 501 13.6%
COMMENT 0 0.0%
SAVE 51 1.4%
USE 0 0.0%
OTHER 221 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 111 12.2% 65 58.6% 5 151.8 340.3
TITLE WORD 197 21.6% 57 28.9% 45 769.3 2452.1
EXACT TITLE 9 1.0% 5 55.6% 2 1.5 0.6
JOURNAL 42 4.6% 28 66.7% 3,780 7137.1 8769.9
EXACT JOURNAL 11 1.2% 4 36.4% 2,249 2554.0 1973.0
SUBJECT 119 13.0% 54 45.4% 128 3087.0 21818.3
EXACT SUBJECT 16 1.8% 5 31.3% 239 1932.5 2218.4
KEYWORD 336 36.8% 71 21.1% 67 1619.8 8039.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 20 2.2% 3 15.0% 470 2195.8 2771.1
DATE 22 2.4% 10 45.5% 15 65.6 85.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 24 2.6% 8 33.3% 2 22.8 45.2
EXACT PE 1 0.1% 0 0.0% 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 4 0.4% 0 0.0% 12 46.5 75.8
By number of indexes:
Multiple 66 7.8% 24 36.4% 73 1058.5 2020.4
Single 777 92.2% 262 33.7% 61 1617.6 9869.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.6%
SHORT 63.0%
LONG 2.3%
FIELDS 2.8%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 24.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 5,054
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 294
displays or when any of these paging options is set.
TEXT included with MAIL commands 870
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:11
Average session length (minutes:seconds) 11:15
Longest session recorded (minutes:seconds) 1120
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 1659.9
Retrievals per search - standard deviation 31957
Percent of searches completed with 0 results 38.3%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 76.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,273 33.4%
DISPLAY (excluding automatic displays) 914 23.9%
HELP 140 3.7%
EXPLAIN 112 2.9%
SET/RESET 243 6.4%
SHOW 24 0.6%
ADD ON (AND, OR, AND NOT) 87 2.3%
LOGON or LOGOFF 747 19.6%
COMMENT 0 0.0%
SAVE 70 1.8%
USE 2 0.1%
OTHER 204 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 132 9.7% 56 42.4% 23 344.4 603.7
TITLE WORD 427 31.3% 160 37.5% 10 219.4 1156.2
EXACT TITLE 22 1.6% 12 54.5% 1 12.3 23.8
JOURNAL 22 1.6% 6 27.3% 134 103321 280990
EXACT JOURNAL 10 0.7% 1 10.0% 21 112.4 199.0
SUBJECT 327 24.0% 132 40.4% 21 344.7 1065.3
EXACT SUBJECT 7 0.5% 1 14.3% 136 208.0 275.3
KEYWORD 357 26.2% 121 33.9% 17 1858.4 10480.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 10 10.0 0.0
DATE 34 2.5% 10 29.4% 88 188.0 201.3
ADDED 2 0.1% 0 0.0% 15 14.5 13.4
PERIODICAL 6 0.4% 2 33.3% 27 53.3 58.9
EXACT PE 4 0.3% 0 0.0% 3 9.5 15.1
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 0.9% 4 33.3% 52 103.1 179.3
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 93 7.4% 27 29.0% 23 281.7 974.0
Single 1,172 92.6% 451 38.5% 14 3070.4 43708.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.0%
SHORT 44.5%
LONG 4.4%
FIELDS 1.1%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 43.2%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.0%
Ten most frequent errors:
1. First word of command is invalid 32.5%
2. NS command - no next screen 29.3%
3. FIND command with invalid index name 11.9%
4. DISPLAY command contains invalid word 4.0%
5. PS command - no previous screen 3.2%
6. Search term missing from search command 1.8%
7. DISPLAY command - no FIND results 1.7%
8. Valid command at an inappropriate time 1.6%
9. MAIL command issued w/o email address 1.3%
10. Add-on search, no index name after verb 0.9%
11. All others 11.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 19.6%
2. LOCATE (ARTICLE DBS) 14.5%
3. FIND 12.3%
4. INDEXES 8.7%
5. COMMANDS 6.7%
6. MAGS DATABASE 5.2%
7. Unrecognized term 5.0%
8. DISPLAYS (IAC DBS) 3.6%
9. MAIL 2.3%
10. ADDON SEARCH 2.0%
11. All others 20.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.9%
2. First word of command is invalid 18.8%
3. FIND command with invalid index name 11.9%
4. FIND command with zero results 6.7%
5. DISPLAY command - middle of >1 screen 4.8%
6. DISPLAY command-first of >1 screen 4.1%
7. DISPLAY command-complete in one screen 3.2%
8. FIND command retrieves >1 book 3.2%
9. NS command - no next screen 2.6%
10. DISPLAY command - last of >1 screen 2.4%
11. All others 16.4%
Ten most frequent SHOW requests:
1. HISTORY 37.2%
2. SEARCH 26.5%
3. MAIL STATUS 9.2%
4. MAIL SETTINGS 5.1%
5. SYSTEM NEWS 4.1%
6. IAC NEWS 3.6%
7. SETTINGS (IAC DBS) 3.6%
8. GLOSSARY 3.6%
9. IAC LOADING STATISTICS 1.0%
10. LIBRARY NEWS 1.0%
11. All others 5.1%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)