MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/10/01 through 03/16/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 189 406 595
Davis 258 4 262
Irvine 179 0 179
Los Angeles 7 172 179
Riverside 110 37 147
San Diego 50 25 75
San Francisco 55 0 55
Santa Barbara 49 42 91
Santa Cruz 86 194 280
LBL 0 19 19
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 2 55 57
Stanford 73
Other-Network UC n/a 176 176
_______ ______ _____
985 1,132 2,190
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 36 137 19,054
2-4 a.m. 28 62 700
4-6 a.m. 2 16 190
6-8 a.m. 28 112 1,149
8-10 a.m. 148 476 4,178
10-12 a.m. 338 872 11,554
12-2 p.m. 396 1,110 13,625
2-4 p.m. 402 1,229 11,058
4-6 p.m. 330 905 9,111
6-8 p.m. 168 478 4,973
8-10 p.m. 185 527 6,105
10-12 p.m. 129 309 2,963
__________ __________ __________ _________________
Total: 2,190 6,233 84,660
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 479 1,136 1,615
Davis 686 20 706
Irvine 594 0 594
Los Angeles 25 490 515
Riverside 299 129 428
San Diego 131 73 204
San Francisco 179 0 179
Santa Barbara 125 111 236
Santa Cruz 385 320 705
LBL 0 45 45
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 2 130 132
Stanford 283
Other-Network UC n/a 586 586
_______ ______ _____
2,905 3,045 6,233
Number of FIND commands by database
MAGS database 5,665
NEWS database 422
COMP database 146
Total number of FIND commands 6,233
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,541 12,399 15,940
Davis 6,042 277 6,319
Irvine 5,455 0 5,455
Los Angeles 120 6,847 6,967
Riverside 3,027 1,584 4,611
San Diego 2,066 18,363 20,429
San Francisco 1,809 0 1,809
Santa Barbara 1,342 1,330 2,672
Santa Cruz 3,885 1,313 5,198
LBL 0 905 905
LLL 0 54 54
Los Alamos n/a 0 0
Other - UC 32 1,893 1,925
Stanford 615
Other-Network UC n/a 9,685 9,685
_______ ______ _____
27,319 54,650 82,584
Number of Records Displayed by database:
MAGS database 61,175
NEWS database 3,998
COMP database 19,487
Total number of Records Displayed 82,584
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.0%
Percent of NEWS sessions 9.0%
Percent of COMP sessions 2.9%
Percent of searches done in the MAGS database 90.9%
Percent of searches done in the NEWS database 6.8%
Percent of searches done in the COMP database 2.3%
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 4.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.1
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:37
Average session length (minutes:seconds) 11:46
Longest session recorded (minutes:seconds) 199:47
Average number of searches completed per session 2.9
Retrievals per search - median 5.0
Retrievals per search - average 575.3
Retrievals per search - standard deviation 4324.5
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 49.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,226 27.4%
DISPLAY (excluding automatic displays) 7,765 40.7%
HELP 567 3.0%
EXPLAIN 378 2.0%
SET/RESET 773 4.1%
SHOW 97 0.5%
ADD ON (AND, OR, AND NOT) 439 2.3%
LOGON or LOGOFF 2,418 12.7%
COMMENT 0 0.0%
SAVE 350 1.8%
USE 7 0.0%
OTHER 1,056 5.5%
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 840 15.6% 236 28.1% 10 63.1 223.7
TITLE WORD 1,152 21.5% 346 30.0% 11 294.3 1913.5
EXACT TITLE 319 5.9% 173 54.2% 2 20.5 86.2
JOURNAL 239 4.5% 99 41.4% 1,267 4397.8 8777.2
EXACT JOURNAL 75 1.4% 46 61.3% 1,088 8782.7 19993.5
SUBJECT 987 18.4% 395 40.0% 29 403.9 1578.9
EXACT SUBJECT 55 1.0% 19 34.5% 69 1224.6 2598.7
KEYWORD 1,481 27.6% 305 20.6% 24 995.1 6920.8
SUBFILE 1 0.0% 0 0.0% 4 4.0 0.0
PUBLICATION TYPE 3 0.1% 1 33.3% 124 124.0 173.9
DATE 32 0.6% 8 25.0% 26 80.9 118.9
ADDED 15 0.3% 3 20.0% 34,970 29922.8 17464.7
PERIODICAL 77 1.4% 13 16.9% 10 81.3 196.9
EXACT PE 30 0.6% 1 3.3% 3 11.5 24.1
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 62 1.2% 10 16.1% 1,288 3007.9 5550.1
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 178 3.4% 58 32.6% 12 762.6 2498.0
Single 5,010 96.6% 1,538 30.7% 17 847.4 5400.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 65.4%
LONG 1.4%
FIELDS 1.0%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 29.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:23
Average session length (minutes:seconds) 11:09
Longest session recorded (minutes:seconds) 88:29
Average number of searches completed per session 2.3
Retrievals per search - median 16.0
Retrievals per search - average 531.6
Retrievals per search - standard deviation 1435.1
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 75.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 131 27.5%
DISPLAY (excluding automatic displays) 146 30.6%
HELP 14 2.9%
EXPLAIN 10 2.1%
SET/RESET 20 4.2%
SHOW 3 0.6%
ADD ON (AND, OR, AND NOT) 15 3.1%
LOGON or LOGOFF 92 19.3%
COMMENT 1 0.2%
SAVE 13 2.7%
USE 0 0.0%
OTHER 32 6.7%
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 13 10.0% 9 69.2% 357 338.0 346.6
TITLE WORD 31 23.8% 13 41.9% 42 285.7 564.3
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 0.8% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 26 20.0% 7 26.9% 42 189.3 454.9
EXACT SUBJECT 4 3.1% 0 0.0% 81 66.5 47.3
KEYWORD 51 39.2% 9 17.6% 236 1527.7 2334.7
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 3 2.3% 0 0.0% 398 528.3 600.2
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 0.8% 0 0.0% 177 177.0 0.0
By number of indexes:
Multiple 1 0.8% 0 0.0% 436 436.0 0.0
Single 128 99.2% 39 30.5% 84 847.3 1754.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 54.3%
LONG 0.8%
FIELDS 2.5%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 37.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,403
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 96
displays or when any of these paging options is set.
TEXT included with MAIL commands 300
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:44
Average session length (minutes:seconds) 9:09
Longest session recorded (minutes:seconds) 115:28
Average number of searches completed per session 2.1
Retrievals per search - median 3.0
Retrievals per search - average 3715.6
Retrievals per search - standard deviation 63722
Percent of searches completed with 0 results 35.1%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 405 31.1%
DISPLAY (excluding automatic displays) 365 28.0%
HELP 52 4.0%
EXPLAIN 23 1.8%
SET/RESET 92 7.1%
SHOW 3 0.2%
ADD ON (AND, OR, AND NOT) 17 1.3%
LOGON or LOGOFF 238 18.3%
COMMENT 0 0.0%
SAVE 31 2.4%
USE 0 0.0%
OTHER 76 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 20 4.8% 6 30.0% 5 306.4 757.4
TITLE WORD 67 16.2% 21 31.3% 11 727.9 3125.6
EXACT TITLE 15 3.6% 8 53.3% 9 144.6 366.7
JOURNAL 10 2.4% 6 60.0% 69,123 358802 628769
EXACT JOURNAL 5 1.2% 2 40.0% 62 195.3 269.9
SUBJECT 96 23.2% 41 42.7% 27 432.9 1091.2
EXACT SUBJECT 10 2.4% 6 60.0% 8 12.5 9.7
KEYWORD 167 40.4% 48 28.7% 15 488.7 3521.8
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 5 1.2% 1 20.0% 43 52.8 48.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.2% 0 0.0% 4 4.0 0.0
EXACT PE 17 4.1% 4 23.5% 4 24.4 39.1
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 0 0.0% 0 0.0% 0 0.0 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 10 2.5% 1 10.0% 18 89.4 160.6
Single 392 97.5% 141 36.0% 14 6197.0 82302.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 49.5%
LONG 2.9%
FIELDS 1.1%
PERIODICALS 6.8%
COMMENTS 0.0%
Other 37.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.6%
Ten most frequent errors:
1. First word of command is invalid 35.2%
2. NS command - no next screen 25.8%
3. FIND command with invalid index name 11.9%
4. PS command - no previous screen 5.3%
5. DISPLAY command contains invalid word 3.7%
6. Valid command at an inappropriate time 2.8%
7. Search term missing from search command 1.9%
8. DISPLAY command - no FIND results 1.3%
9. MAIL command issued w/o email address 1.0%
10. DISPLAY command-record numbers too large 0.9%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.6%
2. LOCATE (ARTICLE DBS) 21.9%
3. COMMANDS 10.7%
4. FIND 6.1%
5. Unrecognized term 4.6%
6. MAGS DATABASE 4.1%
7. INDEXES 4.1%
8. ADDON SEARCH 2.7%
9. DISPLAYS (IAC DBS) 1.7%
10. DATABASES 1.7%
11. All others 18.7%
Ten most frequent HELP situations:
1. Help requested from SET DB command 23.4%
2. First word of command is invalid 19.4%
3. FIND command with invalid index name 10.6%
4. FIND command with zero results 7.6%
5. DISPLAY command-first of >1 screen 7.0%
6. DISPLAY command - middle of >1 screen 4.7%
7. DISPLAY command-complete in one screen 4.0%
8. NS command - no next screen 3.0%
9. FIND command retrieves >1 book 2.8%
10. PS command - no previous screen 1.9%
11. All others 15.6%
Ten most frequent SHOW requests:
1. HISTORY 68.8%
2. SEARCH 11.5%
3. IAC NEWS 4.2%
4. SETTINGS (IAC DBS) 4.2%
5. MAIL STATUS 4.2%
6. SYSTEM NEWS 2.1%
7. GLOSSARY 1.0%
8. MAIL SETTINGS 1.0%
9. DISPLAY 1.0%
10. 9903 1.0%
11. All others 1.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)