MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/01/01 through 09/30/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 404 1,007 1,411
Davis 395 0 395
Irvine 336 0 336
Los Angeles 8 267 275
Riverside 50 38 88
San Diego 78 101 179
San Francisco 105 0 105
Santa Barbara 22 78 100
Santa Cruz 45 67 112
LBL 0 39 39
LLL 0 14 14
Los Alamos n/a 7 7
Other - UC 9 117 126
Stanford 20
Other-Network UC n/a 331 331
_______ ______ _____
1,452 2,066 3,538
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 46 170 3,321
2-4 a.m. 24 87 1,080
4-6 a.m. 14 56 974
6-8 a.m. 70 191 2,360
8-10 a.m. 329 805 10,465
10-12 a.m. 584 1,710 16,701
12-2 p.m. 670 1,621 16,611
2-4 p.m. 865 2,180 24,257
4-6 p.m. 490 1,354 15,293
6-8 p.m. 185 554 7,030
8-10 p.m. 151 444 5,559
10-12 p.m. 110 459 6,569
__________ __________ __________ _________________
Total: 3,538 9,631 110,220
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,122 2,419 3,541
Davis 958 1 959
Irvine 1,218 0 1,218
Los Angeles 18 722 740
Riverside 154 110 264
San Diego 187 290 477
San Francisco 286 0 286
Santa Barbara 114 186 300
Santa Cruz 144 159 303
LBL 0 85 85
LLL 0 62 62
Los Alamos n/a 23 23
Other - UC 21 319 340
Stanford 43
Other-Network UC n/a 990 990
_______ ______ _____
4,222 5,366 9,631
Number of FIND commands by database
MAGS database 8,601
NEWS database 622
COMP database 408
Total number of FIND commands 9,631
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 14,481 28,757 43,238
Davis 9,708 0 9,708
Irvine 6,963 0 6,963
Los Angeles 263 11,552 11,815
Riverside 1,268 979 2,247
San Diego 1,410 4,124 5,534
San Francisco 4,342 0 4,342
Santa Barbara 945 2,515 3,460
Santa Cruz 1,010 1,452 2,462
LBL 0 1,872 1,872
LLL 0 851 851
Los Alamos n/a 406 406
Other - UC 206 4,542 4,748
Stanford 56
Other-Network UC n/a 12,328 12,328
_______ ______ _____
40,596 69,378 110,030
Number of Records Displayed by database:
MAGS database 100,832
NEWS database 3,774
COMP database 5,614
Total number of Records Displayed 110,030
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 8.7%
Percent of COMP sessions 5.0%
Percent of searches done in the MAGS database 89.3%
Percent of searches done in the NEWS database 6.5%
Percent of searches done in the COMP database 4.2%
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 5.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:54
Average session length (minutes:seconds) 13:56
Longest session recorded (minutes:seconds) 443:01
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 757.0
Retrievals per search - standard deviation 13071
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 60.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,954 28.2%
DISPLAY (excluding automatic displays) 11,063 39.2%
HELP 706 2.5%
EXPLAIN 547 1.9%
SET/RESET 1,282 4.5%
SHOW 98 0.3%
ADD ON (AND, OR, AND NOT) 647 2.3%
LOGON or LOGOFF 3,804 13.5%
COMMENT 0 0.0%
SAVE 565 2.0%
USE 7 0.0%
OTHER 1,576 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 1,927 23.1% 486 25.2% 11 67.1 237.9
TITLE WORD 2,106 25.3% 644 30.6% 13 298.5 2186.1
EXACT TITLE 290 3.5% 138 47.6% 2 213.7 940.1
JOURNAL 391 4.7% 179 45.8% 1,438 15336.4 75462.7
EXACT JOURNAL 230 2.8% 100 43.5% 1,549 10953.6 33509.7
SUBJECT 1,372 16.5% 470 34.3% 24 210.3 690.9
EXACT SUBJECT 84 1.0% 24 28.6% 124 737.2 1128.9
KEYWORD 1,463 17.6% 293 20.0% 33 688.3 5868.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 28 0.3% 6 21.4% 4 12.0 16.7
DATE 154 1.8% 30 19.5% 13 48.9 103.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 136 1.6% 17 12.5% 10 294.1 1403.3
EXACT PE 93 1.1% 18 19.4% 7 27.7 70.6
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 53 0.6% 7 13.2% 266 3314.9 6968.3
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 410 5.2% 135 32.9% 9 498.6 2506.6
Single 7,495 94.8% 2,137 28.5% 18 1157.4 16468.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 60.4%
LONG 1.8%
FIELDS 1.5%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 31.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:18
Average session length (minutes:seconds) 9:03
Longest session recorded (minutes:seconds) 87:49
Average number of searches completed per session 2.3
Retrievals per search - median 4.0
Retrievals per search - average 847.9
Retrievals per search - standard deviation 5551.3
Percent of searches completed with 0 results 30.5%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 85.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 369 24.6%
DISPLAY (excluding automatic displays) 644 43.0%
HELP 24 1.6%
EXPLAIN 24 1.6%
SET/RESET 71 4.7%
SHOW 1 0.1%
ADD ON (AND, OR, AND NOT) 39 2.6%
LOGON or LOGOFF 223 14.9%
COMMENT 0 0.0%
SAVE 4 0.3%
USE 0 0.0%
OTHER 100 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 67 16.8% 36 53.7% 4 57.0 195.6
TITLE WORD 91 22.8% 28 30.8% 5 2301.1 12540.4
EXACT TITLE 1 0.3% 1 100% 0 0.0 0.0
JOURNAL 18 4.5% 10 55.6% 663 818.5 956.5
EXACT JOURNAL 4 1.0% 1 25.0% 3,373 4241.3 4734.6
SUBJECT 29 7.3% 9 31.0% 76 236.1 291.4
EXACT SUBJECT 4 1.0% 1 25.0% 153 229.0 271.1
KEYWORD 155 38.8% 33 21.3% 53 1379.5 4420.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 1.3% 1 20.0% 503 729.0 877.0
DATE 14 3.5% 1 7.1% 22 305.8 923.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 11 2.8% 1 9.1% 21 311.8 868.7
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 28 7.6% 6 21.4% 22 339.6 807.5
Single 340 92.4% 110 32.4% 21 1452.5 7329.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
SHORT 64.5%
LONG 0.3%
FIELDS 3.5%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 27.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,458
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 127
displays or when any of these paging options is set.
TEXT included with MAIL commands 531
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:36
Average session length (minutes:seconds) 8:05
Longest session recorded (minutes:seconds) 92:31
Average number of searches completed per session 2.0
Retrievals per search - median 2.0
Retrievals per search - average 1654.0
Retrievals per search - standard deviation 34729
Percent of searches completed with 0 results 35.1%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 25.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 581 33.1%
DISPLAY (excluding automatic displays) 414 23.6%
HELP 54 3.1%
EXPLAIN 48 2.7%
SET/RESET 162 9.2%
SHOW 16 0.9%
ADD ON (AND, OR, AND NOT) 41 2.3%
LOGON or LOGOFF 336 19.2%
COMMENT 0 0.0%
SAVE 20 1.1%
USE 0 0.0%
OTHER 82 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 61 9.7% 21 34.4% 9 132.2 328.1
TITLE WORD 226 36.0% 76 33.6% 10 129.5 378.1
EXACT TITLE 43 6.9% 15 34.9% 1 11.0 49.8
JOURNAL 21 3.3% 14 66.7% 256 123548 325748
EXACT JOURNAL 8 1.3% 6 75.0% 250 250.0 347.9
SUBJECT 84 13.4% 40 47.6% 25 430.5 1355.4
EXACT SUBJECT 2 0.3% 2 100% 0 0.0 0.0
KEYWORD 125 19.9% 33 26.4% 20 1102.0 4789.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.2% 0 0.0% 13 13.0 0.0
DATE 27 4.3% 1 3.7% 31 188.1 400.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 11 1.8% 1 9.1% 30 33.9 26.9
EXACT PE 12 1.9% 2 16.7% 14 26.5 28.6
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 6 1.0% 5 83.3% 2 2.0 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 48 8.3% 8 16.7% 12 147.4 339.8
Single 529 91.7% 200 37.8% 13 3051.8 47587.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.3%
SHORT 45.0%
LONG 2.9%
FIELDS 1.3%
PERIODICALS 4.0%
COMMENTS 0.0%
Other 43.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.8%
Ten most frequent errors:
1. First word of command is invalid 35.1%
2. NS command - no next screen 26.0%
3. FIND command with invalid index name 13.3%
4. PS command - no previous screen 3.7%
5. DISPLAY command contains invalid word 3.5%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 2.2%
8. DISPLAY command - no FIND results 1.1%
9. MAIL command issued w/o email address 1.0%
10. NS of SHOW/EXP command-no next screen 0.9%
11. All others 10.9%
Ten most frequent EXPLAIN requests:
1. GUIDE 19.9%
2. LOCATE (ARTICLE DBS) 15.3%
3. FIND 11.8%
4. INDEXES 8.9%
5. COMMANDS 7.8%
6. MAGS DATABASE 4.4%
7. MAIL 3.4%
8. Unrecognized term 3.2%
9. ADDON SEARCH 2.3%
10. A031 2.1%
11. All others 21.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.4%
2. First word of command is invalid 18.0%
3. FIND command with invalid index name 10.7%
4. DISPLAY command-first of >1 screen 7.0%
5. FIND command with zero results 6.5%
6. DISPLAY command-complete in one screen 4.7%
7. DISPLAY command - middle of >1 screen 3.8%
8. FIND command retrieves >1 book 3.6%
9. PS command - no previous screen 1.9%
10. NS command - no next screen 1.9%
11. All others 16.5%
Ten most frequent SHOW requests:
1. HISTORY 40.7%
2. IAC NEWS 17.7%
3. SEARCH 13.3%
4. SYSTEM NEWS 7.1%
5. GLOSSARY 5.3%
6. MAIL STATUS 5.3%
7. SETTINGS (IAC DBS) 3.5%
8. LIBRARY NEWS 2.7%
9. LIBRARY LOCATIONS 1.8%
10. Z39.50 NEWS 0.9%
11. All others 1.8%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)