MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/01/02 through 04/30/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 543 1,025 1,568
Davis 403 5 408
Irvine 367 0 367
Los Angeles 7 189 196
Riverside 42 33 75
San Diego 90 76 166
San Francisco 60 0 60
Santa Barbara 36 98 134
Santa Cruz 77 103 180
LBL 0 37 37
LLL 0 14 14
Los Alamos n/a 3 3
Other - UC 0 204 204
Stanford 8
Other-Network UC n/a 370 370
_______ ______ _____
1,625 2,157 3,790
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 57 136 1,449
2-4 a.m. 30 84 1,716
4-6 a.m. 8 24 125
6-8 a.m. 40 106 1,220
8-10 a.m. 357 861 10,685
10-12 a.m. 621 1,656 18,510
12-2 p.m. 699 1,613 14,999
2-4 p.m. 800 1,939 19,852
4-6 p.m. 572 1,414 14,422
6-8 p.m. 235 684 11,406
8-10 p.m. 221 641 6,485
10-12 p.m. 150 369 4,271
__________ __________ __________ _________________
Total: 3,790 9,527 105,140
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,390 2,657 4,047
Davis 864 16 880
Irvine 1,251 0 1,251
Los Angeles 51 372 423
Riverside 102 92 194
San Diego 117 144 261
San Francisco 133 0 133
Santa Barbara 110 270 380
Santa Cruz 218 200 418
LBL 0 74 74
LLL 0 36 36
Los Alamos n/a 8 8
Other - UC 1 490 491
Stanford 27
Other-Network UC n/a 904 904
_______ ______ _____
4,237 5,263 9,527
Number of FIND commands by database
MAGS database 8,470
NEWS database 765
COMP database 292
Total number of FIND commands 9,527
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 17,439 33,896 51,335
Davis 7,897 288 8,185
Irvine 5,660 0 5,660
Los Angeles 436 3,330 3,766
Riverside 501 696 1,197
San Diego 2,016 3,682 5,698
San Francisco 1,287 0 1,287
Santa Barbara 1,373 1,002 2,375
Santa Cruz 803 2,432 3,235
LBL 0 989 989
LLL 0 2,754 2,754
Los Alamos n/a 91 91
Other - UC 3 5,717 5,720
Stanford 24
Other-Network UC n/a 12,464 12,464
_______ ______ _____
37,415 67,341 104,780
Number of Records Displayed by database:
MAGS database 89,410
NEWS database 7,186
COMP database 8,544
Total number of Records Displayed 104,780
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.2%
Percent of NEWS sessions 9.6%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 88.9%
Percent of searches done in the NEWS database 8.0%
Percent of searches done in the COMP database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.4
Standard deviation in seconds 1.6
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.6
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:48
Average session length (minutes:seconds) 11:59
Longest session recorded (minutes:seconds) 416:40
Average number of searches completed per session 2.5
Retrievals per search - median 4.0
Retrievals per search - average 499.9
Retrievals per search - standard deviation 8376.5
Percent of searches completed with 0 results 30.9%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 49.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,074 28.4%
DISPLAY (excluding automatic displays) 10,821 38.0%
HELP 908 3.2%
EXPLAIN 651 2.3%
SET/RESET 1,366 4.8%
SHOW 96 0.3%
ADD ON (AND, OR, AND NOT) 396 1.4%
LOGON or LOGOFF 4,191 14.7%
COMMENT 0 0.0%
SAVE 527 1.9%
USE 6 0.0%
OTHER 1,418 5.0%
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 1,525 18.4% 432 28.3% 9 50.1 173.0
TITLE WORD 1,975 23.8% 647 32.8% 11 951.0 19275.1
EXACT TITLE 515 6.2% 181 35.1% 1 59.1 494.3
JOURNAL 288 3.5% 161 55.9% 1,001 5969.4 14765.9
EXACT JOURNAL 279 3.4% 124 44.4% 1,006 4883.8 11263.8
SUBJECT 1,684 20.3% 619 36.8% 35 378.3 1308.2
EXACT SUBJECT 75 0.9% 25 33.3% 21 144.2 415.1
KEYWORD 1,419 17.1% 281 19.8% 24 749.1 5844.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 22 0.3% 6 27.3% 17 240.3 698.9
DATE 112 1.4% 19 17.0% 12 42.9 70.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 149 1.8% 23 15.4% 6 70.2 283.9
EXACT PE 190 2.3% 19 10.0% 3 17.5 109.5
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 0.7% 20 32.3% 146 2419.7 4643.5
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 274 3.4% 82 29.9% 11 416.4 2132.5
Single 7,737 96.6% 2,387 30.9% 14 761.9 10478.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 62.2%
LONG 1.0%
FIELDS 1.1%
PERIODICALS 2.9%
COMMENTS 0.0%
Other 30.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:58
Average session length (minutes:seconds) 9:46
Longest session recorded (minutes:seconds) 193:44
Average number of searches completed per session 2.4
Retrievals per search - median 4.0
Retrievals per search - average 547.3
Retrievals per search - standard deviation 3027.7
Percent of searches completed with 0 results 31.6%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 258 29.3%
DISPLAY (excluding automatic displays) 267 30.3%
HELP 27 3.1%
EXPLAIN 26 3.0%
SET/RESET 68 7.7%
SHOW 3 0.3%
ADD ON (AND, OR, AND NOT) 34 3.9%
LOGON or LOGOFF 132 15.0%
COMMENT 0 0.0%
SAVE 24 2.7%
USE 0 0.0%
OTHER 41 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 26 9.6% 19 73.1% 3 12.1 23.4
TITLE WORD 71 26.2% 29 40.8% 38 461.3 1994.0
EXACT TITLE 3 1.1% 2 66.7% 1 1.0 0.0
JOURNAL 14 5.2% 7 50.0% 280 5219.1 11294.1
EXACT JOURNAL 1 0.4% 0 0.0% 7,306 7306.0 0.0
SUBJECT 39 14.4% 17 43.6% 11 549.8 1057.4
EXACT SUBJECT 1 0.4% 1 100% 0 0.0 0.0
KEYWORD 75 27.7% 9 12.0% 30 1073.4 4508.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 1.8% 1 20.0% 1,093 2723.8 4055.8
DATE 5 1.8% 1 20.0% 17 17.3 14.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 24 8.9% 2 8.3% 4 6.7 11.3
EXACT PE 7 2.6% 0 0.0% 4 4.4 4.1
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
By number of indexes:
Multiple 17 6.7% 5 29.4% 112 1014.7 2475.4
Single 237 93.3% 78 32.9% 11 836.7 3911.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.2%
SHORT 45.1%
LONG 0.6%
FIELDS 2.6%
PERIODICALS 7.6%
COMMENTS 0.0%
Other 36.8%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,920
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 110
displays or when any of these paging options is set.
TEXT included with MAIL commands 413
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 4:09
Average session length (minutes:seconds) 9:14
Longest session recorded (minutes:seconds) 129:06
Average number of searches completed per session 2.1
Retrievals per search - median 2.0
Retrievals per search - average 395.5
Retrievals per search - standard deviation 3147.5
Percent of searches completed with 0 results 35.0%
Percent of searches entered that are long 2.6%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 722 31.9%
DISPLAY (excluding automatic displays) 532 23.5%
HELP 96 4.2%
EXPLAIN 56 2.5%
SET/RESET 186 8.2%
SHOW 15 0.7%
ADD ON (AND, OR, AND NOT) 43 1.9%
LOGON or LOGOFF 404 17.9%
COMMENT 0 0.0%
SAVE 119 5.3%
USE 0 0.0%
OTHER 87 3.8%
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 71 9.2% 20 28.2% 17 256.2 554.3
TITLE WORD 181 23.4% 69 38.1% 7 120.4 421.9
EXACT TITLE 64 8.3% 26 40.6% 1 6.2 27.7
JOURNAL 6 0.8% 1 16.7% 48 18176.8 24864.1
EXACT JOURNAL 21 2.7% 8 38.1% 164 191.8 335.9
SUBJECT 172 22.2% 82 47.7% 37 829.8 2253.5
EXACT SUBJECT 4 0.5% 2 50.0% 33 33.0 0.0
KEYWORD 147 19.0% 40 27.2% 19 965.5 5146.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.4% 2 66.7% 11 11.0 0.0
DATE 31 4.0% 6 19.4% 50 94.2 99.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 59 7.6% 10 16.9% 3 16.8 39.8
EXACT PE 15 1.9% 0 0.0% 5 7.5 7.1
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 1 0.1% 0 0.0% 43 43.0 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 59 8.3% 15 25.4% 21 104.1 207.3
Single 653 91.7% 236 36.1% 9 700.5 4211.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 43.9%
LONG 2.5%
FIELDS 3.7%
PERIODICALS 7.8%
COMMENTS 0.0%
Other 40.3%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.7%
Ten most frequent errors:
1. First word of command is invalid 38.2%
2. NS command - no next screen 21.1%
3. FIND command with invalid index name 15.1%
4. PS command - no previous screen 4.6%
5. DISPLAY command contains invalid word 2.9%
6. Valid command at an inappropriate time 2.5%
7. Search term missing from search command 2.5%
8. DISPLAY command - no FIND results 1.1%
9. NS of SHOW/EXP command-no next screen 1.1%
10. MAIL command issued w/o email address 1.0%
11. All others 9.8%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 28.5%
2. GUIDE 25.0%
3. INDEXES 8.7%
4. FIND 7.0%
5. COMMANDS 6.0%
6. MAGS DATABASE 5.6%
7. Unrecognized term 3.8%
8. DISPLAYS (IAC DBS) 2.9%
9. ADDON SEARCH 2.5%
10. DATABASES 1.6%
11. All others 8.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.0%
2. First word of command is invalid 21.6%
3. FIND command with invalid index name 12.3%
4. DISPLAY command-complete in one screen 6.0%
5. DISPLAY command - middle of >1 screen 4.8%
6. FIND command with zero results 4.8%
7. DISPLAY command-first of >1 screen 4.0%
8. NS command - no next screen 2.4%
9. PS command - no previous screen 2.3%
10. FIND command retrieves >1 book 2.1%
11. All others 13.8%
Ten most frequent SHOW requests:
1. SEARCH 33.3%
2. HISTORY 29.8%
3. IAC NEWS 19.3%
4. SETTINGS (IAC DBS) 5.3%
5. SYSTEM NEWS 4.4%
6. GLOSSARY 2.6%
7. MAIL STATUS 1.8%
8. SYSTEM1 NEWS 0.9%
9. DATES 0.9%
10. TIMEOUT SETTING 0.9%
11. All others 0.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)