MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/02/00 through 12/08/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 251 444 695
Davis 308 11 319
Irvine 182 0 182
Los Angeles 15 159 174
Riverside 141 32 173
San Diego 33 56 89
San Francisco 79 0 79
Santa Barbara 61 79 140
Santa Cruz 93 49 142
LBL 0 6 6
LLL 0 8 8
Los Alamos n/a 0 0
Other - UC 6 95 101
Stanford 47
Other-Network UC n/a 171 171
_______ ______ _____
1,169 1,110 2,326
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 37 89 1,246
2-4 a.m. 24 109 2,539
4-6 a.m. 20 89 750
6-8 a.m. 32 84 1,299
8-10 a.m. 134 345 3,697
10-12 a.m. 332 1,022 10,232
12-2 p.m. 437 1,211 13,372
2-4 p.m. 498 1,527 17,907
4-6 p.m. 388 1,126 11,913
6-8 p.m. 178 494 6,994
8-10 p.m. 157 626 6,555
10-12 p.m. 89 317 3,931
__________ __________ __________ _________________
Total: 2,326 7,039 80,435
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 814 1,218 2,032
Davis 831 37 868
Irvine 628 0 628
Los Angeles 47 481 528
Riverside 407 76 483
San Diego 91 161 252
San Francisco 269 0 269
Santa Barbara 184 273 457
Santa Cruz 363 177 540
LBL 0 13 13
LLL 0 39 39
Los Alamos n/a 0 0
Other - UC 14 302 316
Stanford 167
Other-Network UC n/a 447 447
_______ ______ _____
3,648 3,224 7,039
Number of FIND commands by database
MAGS database 6,333
NEWS database 440
COMP database 266
Total number of FIND commands 7,039
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,772 15,285 23,057
Davis 6,032 189 6,221
Irvine 4,846 0 4,846
Los Angeles 1,017 9,063 10,080
Riverside 3,023 1,474 4,497
San Diego 498 1,151 1,649
San Francisco 3,431 0 3,431
Santa Barbara 2,033 3,474 5,507
Santa Cruz 3,306 2,465 5,771
LBL 0 76 76
LLL 0 697 697
Los Alamos n/a 0 0
Other - UC 222 5,731 5,953
Stanford 204
Other-Network UC n/a 7,364 7,364
_______ ______ _____
32,180 46,969 79,353
Number of Records Displayed by database:
MAGS database 73,637
NEWS database 3,812
COMP database 2,986
Total number of Records Displayed 79,353
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.3%
Percent of NEWS sessions 7.7%
Percent of COMP sessions 4.0%
Percent of searches done in the MAGS database 90.0%
Percent of searches done in the NEWS database 6.3%
Percent of searches done in the COMP database 3.8%
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 1.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:54
Average session length (minutes:seconds) 11:42
Longest session recorded (minutes:seconds) 341:13
Average number of searches completed per session 3.1
Retrievals per search - median 5.0
Retrievals per search - average 703.0
Retrievals per search - standard deviation 6558.9
Percent of searches completed with 0 results 30.2%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 52.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,933 28.2%
DISPLAY (excluding automatic displays) 8,295 39.4%
HELP 702 3.3%
EXPLAIN 517 2.5%
SET/RESET 652 3.1%
SHOW 94 0.4%
ADD ON (AND, OR, AND NOT) 400 1.9%
LOGON or LOGOFF 2,955 14.0%
COMMENT 0 0.0%
SAVE 314 1.5%
USE 2 0.0%
OTHER 1,201 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 1,156 18.9% 321 27.8% 8 84.9 323.9
TITLE WORD 1,170 19.2% 357 30.5% 13 465.7 2601.7
EXACT TITLE 194 3.2% 108 55.7% 2 134.7 831.9
JOURNAL 300 4.9% 135 45.0% 1,253 8529.3 17749.4
EXACT JOURNAL 126 2.1% 51 40.5% 892 6701.1 10973.1
SUBJECT 1,343 22.0% 479 35.7% 28 300.9 1559.3
EXACT SUBJECT 27 0.4% 14 51.9% 201 456.4 689.4
KEYWORD 1,555 25.5% 339 21.8% 29 1405.9 12392.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 19 0.3% 5 26.3% 8 12.5 15.6
DATE 49 0.8% 10 20.4% 19 270.3 713.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 83 1.4% 6 7.2% 12 269.9 1628.5
EXACT PE 38 0.6% 1 2.6% 4 28.1 73.2
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 45 0.7% 12 26.7% 106 913.4 1899.0
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 214 3.6% 65 30.4% 5 235.1 928.6
Single 5,669 96.4% 1,704 30.1% 20 1094.4 8227.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 64.5%
LONG 1.7%
FIELDS 0.8%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 30.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 11:50
Average session length (minutes:seconds) 13:27
Longest session recorded (minutes:seconds) 119:56
Average number of searches completed per session 2.8
Retrievals per search - median 8.5
Retrievals per search - average 802.6
Retrievals per search - standard deviation 5244.3
Percent of searches completed with 0 results 33.8%
Percent of searches entered that are long 4.9%
Percent of long searches completed
(includes partial results) 61.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 239 26.3%
DISPLAY (excluding automatic displays) 371 40.8%
HELP 10 1.1%
EXPLAIN 11 1.2%
SET/RESET 40 4.4%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 27 3.0%
LOGON or LOGOFF 117 12.9%
COMMENT 0 0.0%
SAVE 50 5.5%
USE 0 0.0%
OTHER 44 4.8%
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 32 13.0% 20 62.5% 8 64.7 127.4
TITLE WORD 72 29.1% 22 30.6% 47 1017.1 3518.8
EXACT TITLE 2 0.8% 2 100% 0 0.0 0.0
JOURNAL 7 2.8% 5 71.4% 39,158 39157.5 55071.6
EXACT JOURNAL 8 3.2% 3 37.5% 4 1848.0 4118.3
SUBJECT 72 29.1% 28 38.9% 24 479.5 1383.4
EXACT SUBJECT 2 0.8% 0 0.0% 2,787 2787.0 0.0
KEYWORD 37 15.0% 4 10.8% 143 932.5 3026.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.8% 1 50.0% 291 291.0 0.0
DATE 2 0.8% 0 0.0% 17 16.5 4.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 9 3.6% 0 0.0% 572 393.4 292.9
EXACT PE 2 0.8% 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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 13 5.6% 5 38.5% 5 8.5 6.1
Single 221 94.4% 75 33.9% 56 1372.3 6948.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.2%
SHORT 54.4%
LONG 1.6%
FIELDS 4.4%
PERIODICALS 2.6%
COMMENTS 0.0%
Other 26.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,671
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 94
displays or when any of these paging options is set.
TEXT included with MAIL commands 403
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:09
Average session length (minutes:seconds) 9:17
Longest session recorded (minutes:seconds) 64:03
Average number of searches completed per session 2.4
Retrievals per search - median 3.0
Retrievals per search - average 2301.3
Retrievals per search - standard deviation 40101
Percent of searches completed with 0 results 38.5%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 58.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 426 33.5%
DISPLAY (excluding automatic displays) 345 27.2%
HELP 63 5.0%
EXPLAIN 39 3.1%
SET/RESET 76 6.0%
SHOW 7 0.6%
ADD ON (AND, OR, AND NOT) 14 1.1%
LOGON or LOGOFF 227 17.9%
COMMENT 0 0.0%
SAVE 12 0.9%
USE 0 0.0%
OTHER 61 4.8%
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 27 6.1% 16 59.3% 8 462.1 1382.4
TITLE WORD 101 22.7% 23 22.8% 14 354.2 885.7
EXACT TITLE 7 1.6% 5 71.4% 5 5.0 0.0
JOURNAL 2 0.4% 1 50.0% 835272 835272 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 182 40.9% 93 51.1% 65 578.7 1485.6
EXACT SUBJECT 4 0.9% 1 25.0% 6,865 4607.3 3910.4
KEYWORD 99 22.2% 23 23.2% 46 829.4 2467.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.4% 0 0.0% 6 6.0 1.4
DATE 14 3.1% 5 35.7% 7 18.1 34.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 0.7% 1 33.3% 3 3.0 0.0
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 0.9% 2 50.0% 481 481.0 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 24 5.7% 7 29.2% 4 16.1 32.0
Single 396 94.3% 156 39.4% 45 4153.9 53904.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.6%
SHORT 52.5%
LONG 2.8%
FIELDS 2.2%
PERIODICALS 0.3%
COMMENTS 0.0%
Other 40.6%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.9%
Ten most frequent errors:
1. First word of command is invalid 37.0%
2. NS command - no next screen 25.7%
3. FIND command with invalid index name 13.3%
4. PS command - no previous screen 4.6%
5. DISPLAY command contains invalid word 3.3%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 2.0%
8. MAIL command issued w/o email address 1.3%
9. DISPLAY command - no FIND results 1.0%
10. DISPLAY command-record numbers too large 0.8%
11. All others 8.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 26.8%
2. GUIDE 25.0%
3. FIND 9.0%
4. COMMANDS 7.2%
5. MAGS DATABASE 6.9%
6. INDEXES 4.8%
7. ADDON SEARCH 3.5%
8. Unrecognized term 3.4%
9. DISPLAYS (IAC DBS) 2.3%
10. 3800 1.2%
11. All others 9.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.2%
2. First word of command is invalid 19.2%
3. FIND command with invalid index name 10.8%
4. DISPLAY command-first of >1 screen 7.4%
5. DISPLAY command - middle of >1 screen 5.5%
6. FIND command with zero results 4.4%
7. DISPLAY command-complete in one screen 4.2%
8. FIND command retrieves >1 book 3.4%
9. NS command - no next screen 3.1%
10. DISPLAY command - last of >1 screen 2.7%
11. All others 13.1%
Ten most frequent SHOW requests:
1. SEARCH 40.0%
2. HISTORY 27.0%
3. MAIL STATUS 15.0%
4. SETTINGS (IAC DBS) 5.0%
5. MAIL SETTINGS 5.0%
6. IAC NEWS 2.0%
7. SYSTEM NEWS 2.0%
8. DISPLAY 2.0%
9. GLOSSARY 1.0%
10. LIBRARY NEWS 1.0%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)