MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/10/01 through 02/16/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 187 427 614
Davis 215 3 218
Irvine 142 0 142
Los Angeles 7 120 127
Riverside 60 22 82
San Diego 31 50 81
San Francisco 73 0 73
Santa Barbara 86 49 135
Santa Cruz 82 81 163
LBL 0 19 19
LLL 0 5 5
Los Alamos n/a 2 2
Other - UC 0 58 58
Stanford 50
Other-Network UC n/a 145 145
_______ ______ _____
883 981 1,914
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 29 73 661
2-4 a.m. 3 18 491
4-6 a.m. 2 6 61
6-8 a.m. 24 76 912
8-10 a.m. 136 360 3,579
10-12 a.m. 322 872 12,328
12-2 p.m. 348 1,037 11,256
2-4 p.m. 424 1,214 14,780
4-6 p.m. 290 665 9,081
6-8 p.m. 145 446 5,897
8-10 p.m. 107 281 4,557
10-12 p.m. 84 218 3,175
__________ __________ __________ _________________
Total: 1,914 5,266 66,778
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 551 1,154 1,705
Davis 548 8 556
Irvine 460 0 460
Los Angeles 13 273 286
Riverside 198 48 246
San Diego 78 103 181
San Francisco 184 0 184
Santa Barbara 232 140 372
Santa Cruz 178 159 337
LBL 0 41 41
LLL 0 8 8
Los Alamos n/a 5 5
Other - UC 2 191 193
Stanford 230
Other-Network UC n/a 462 462
_______ ______ _____
2,444 2,592 5,266
Number of FIND commands by database
MAGS database 4,691
NEWS database 446
COMP database 129
Total number of FIND commands 5,266
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,174 14,414 21,588
Davis 5,783 77 5,860
Irvine 3,504 0 3,504
Los Angeles 447 4,384 4,831
Riverside 1,154 860 2,014
San Diego 610 926 1,536
San Francisco 1,994 0 1,994
Santa Barbara 2,390 2,462 4,852
Santa Cruz 2,143 2,867 5,010
LBL 0 884 884
LLL 0 36 36
Los Alamos n/a 43 43
Other - UC 12 2,280 2,292
Stanford 269
Other-Network UC n/a 10,403 10,403
_______ ______ _____
25,211 39,636 65,116
Number of Records Displayed by database:
MAGS database 61,025
NEWS database 4,747
COMP database 1,006
Total number of Records Displayed 65,116
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.0%
Percent of NEWS sessions 9.7%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 89.1%
Percent of searches done in the NEWS database 8.5%
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 2.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:16
Average session length (minutes:seconds) 11:08
Longest session recorded (minutes:seconds) 233:24
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 653.9
Retrievals per search - standard deviation 6034.3
Percent of searches completed with 0 results 31.1%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 56.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,405 28.5%
DISPLAY (excluding automatic displays) 5,859 37.8%
HELP 495 3.2%
EXPLAIN 366 2.4%
SET/RESET 593 3.8%
SHOW 86 0.6%
ADD ON (AND, OR, AND NOT) 286 1.8%
LOGON or LOGOFF 2,215 14.3%
COMMENT 0 0.0%
SAVE 307 2.0%
USE 6 0.0%
OTHER 862 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 968 21.2% 275 28.4% 10 79.3 279.6
TITLE WORD 946 20.7% 299 31.6% 11 629.1 6670.6
EXACT TITLE 149 3.3% 87 58.4% 4 12.6 17.2
JOURNAL 205 4.5% 110 53.7% 804 6842.3 28489.6
EXACT JOURNAL 103 2.3% 44 42.7% 916 5775.0 11418.3
SUBJECT 890 19.5% 387 43.5% 32 295.7 760.9
EXACT SUBJECT 39 0.9% 10 25.6% 188 475.4 1638.2
KEYWORD 1,026 22.4% 178 17.3% 24 622.8 3891.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 13 0.3% 2 15.4% 11 32.8 68.2
DATE 50 1.1% 10 20.0% 20 132.5 217.8
ADDED 9 0.2% 0 0.0% 63,002 49610.9 18996.5
PERIODICAL 86 1.9% 18 20.9% 13 1029.1 7488.3
EXACT PE 30 0.7% 0 0.0% 6 17.1 31.3
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 56 1.2% 12 21.4% 2,263 6076.5 9359.4
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 195 4.5% 55 28.2% 14 784.7 2494.5
Single 4,171 95.5% 1,319 31.6% 19 951.8 7553.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 61.6%
LONG 1.7%
FIELDS 1.2%
PERIODICALS 2.0%
COMMENTS 0.0%
Other 31.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:02
Average session length (minutes:seconds) 9:56
Longest session recorded (minutes:seconds) 74:59
Average number of searches completed per session 1.6
Retrievals per search - median 3.0
Retrievals per search - average 598.4
Retrievals per search - standard deviation 3569.4
Percent of searches completed with 0 results 35.7%
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 111 22.4%
DISPLAY (excluding automatic displays) 169 34.1%
HELP 11 2.2%
EXPLAIN 14 2.8%
SET/RESET 33 6.7%
SHOW 1 0.2%
ADD ON (AND, OR, AND NOT) 18 3.6%
LOGON or LOGOFF 103 20.8%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 36 7.3%
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 26 21.7% 19 73.1% 2 380.6 988.9
TITLE WORD 26 21.7% 18 69.2% 8 82.8 144.2
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 5 4.2% 4 80.0% 36,148 36148.0 0.0
EXACT JOURNAL 2 1.7% 0 0.0% 8,949 8949.0 12101.4
SUBJECT 12 10.0% 2 16.7% 16 71.0 132.5
EXACT SUBJECT 1 0.8% 0 0.0% 6,194 6194.0 0.0
KEYWORD 41 34.2% 7 17.1% 89 366.6 638.8
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 2 1.7% 0 0.0% 44 43.5 51.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.7% 0 0.0% 12 12.0 0.0
EXACT PE 3 2.5% 0 0.0% 2 2.3 0.6
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 8 7.2% 6 75.0% 44 43.5 51.6
Single 103 92.8% 37 35.9% 25 1161.9 4942.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.6%
SHORT 62.0%
LONG 2.3%
FIELDS 0.4%
PERIODICALS 3.4%
COMMENTS 0.0%
Other 26.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,200
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 65
displays or when any of these paging options is set.
TEXT included with MAIL commands 203
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:42
Average session length (minutes:seconds) 10:37
Longest session recorded (minutes:seconds) 148:36
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 5527.3
Retrievals per search - standard deviation 68726
Percent of searches completed with 0 results 35.4%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 418 31.6%
DISPLAY (excluding automatic displays) 360 27.2%
HELP 62 4.7%
EXPLAIN 39 2.9%
SET/RESET 68 5.1%
SHOW 5 0.4%
ADD ON (AND, OR, AND NOT) 28 2.1%
LOGON or LOGOFF 261 19.7%
COMMENT 0 0.0%
SAVE 23 1.7%
USE 0 0.0%
OTHER 60 4.5%
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 28 6.3% 17 60.7% 16 296.8 589.0
TITLE WORD 119 27.0% 35 29.4% 13 615.0 1820.3
EXACT TITLE 13 2.9% 5 38.5% 50 187.4 227.8
JOURNAL 7 1.6% 1 14.3% 231443 369741 505567
EXACT JOURNAL 3 0.7% 0 0.0% 16 17.7 10.6
SUBJECT 111 25.2% 51 45.9% 29 1192.6 4457.9
EXACT SUBJECT 6 1.4% 1 16.7% 38 457.4 692.7
KEYWORD 127 28.8% 39 30.7% 35 706.8 3200.8
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 17 3.9% 7 41.2% 5 402.3 836.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.2% 0 0.0% 5,412 5412.0 0.0
EXACT PE 2 0.5% 1 50.0% 20 20.0 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 7 1.6% 0 0.0% 1,970 1614.4 734.8
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 24 5.8% 8 33.3% 8 378.3 796.0
Single 391 94.2% 141 36.1% 32 9678.3 91339.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.4%
SHORT 49.9%
LONG 1.3%
FIELDS 3.9%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 39.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.8%
Ten most frequent errors:
1. First word of command is invalid 37.8%
2. NS command - no next screen 23.7%
3. FIND command with invalid index name 14.3%
4. PS command - no previous screen 4.8%
5. DISPLAY command contains invalid word 2.9%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 2.1%
8. MAIL command issued w/o email address 1.1%
9. DISPLAY command - no FIND results 0.7%
10. Index invalid in current database 0.7%
11. All others 9.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 34.1%
2. LOCATE (ARTICLE DBS) 16.5%
3. INDEXES 6.2%
4. COMMANDS 6.2%
5. FIND 5.0%
6. MAGS DATABASE 4.3%
7. Unrecognized term 4.3%
8. DISPLAYS (IAC DBS) 2.6%
9. ADDON SEARCH 2.1%
10. MAIL 1.9%
11. All others 16.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.5%
2. First word of command is invalid 20.3%
3. FIND command with invalid index name 10.6%
4. FIND command with zero results 6.7%
5. DISPLAY command-first of >1 screen 5.8%
6. DISPLAY command-complete in one screen 3.4%
7. DISPLAY command - middle of >1 screen 3.3%
8. FIND command retrieves >1 book 2.9%
9. PS command - no previous screen 2.6%
10. NS command - no next screen 2.3%
11. All others 15.4%
Ten most frequent SHOW requests:
1. SEARCH 42.7%
2. HISTORY 35.4%
3. GLOSSARY 3.7%
4. SYSTEM NEWS 3.7%
5. SETTINGS (IAC DBS) 2.4%
6. DISPLAY 2.4%
7. MAIL STATUS 2.4%
8. CURRENT CITES 1.2%
9. 0208 1.2%
10. 0218 1.2%
11. All others 3.7%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)