MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/01/01 through 04/30/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,087 1,884 2,971
Davis 776 4 780
Irvine 802 0 802
Los Angeles 11 423 434
Riverside 156 109 265
San Diego 138 133 271
San Francisco 175 0 175
Santa Barbara 70 113 183
Santa Cruz 276 194 470
LBL 0 25 25
LLL 0 10 10
Los Alamos n/a 1 1
Other - UC 36 344 380
Stanford 167
Other-Network UC n/a 662 662
_______ ______ _____
3,527 3,902 7,596
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 118 415 7,969
2-4 a.m. 48 137 1,346
4-6 a.m. 27 80 829
6-8 a.m. 86 253 4,528
8-10 a.m. 532 1,485 15,416
10-12 a.m. 1,272 3,632 34,922
12-2 p.m. 1,317 3,904 40,707
2-4 p.m. 1,592 4,321 51,922
4-6 p.m. 1,208 3,167 38,542
6-8 p.m. 642 1,888 22,188
8-10 p.m. 476 1,143 14,813
10-12 p.m. 278 698 8,728
__________ __________ __________ _________________
Total: 7,596 21,123 241,910
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,466 4,916 8,382
Davis 2,120 23 2,143
Irvine 2,133 0 2,133
Los Angeles 30 1,027 1,057
Riverside 522 300 822
San Diego 292 344 636
San Francisco 433 0 433
Santa Barbara 170 281 451
Santa Cruz 694 391 1,085
LBL 0 44 44
LLL 0 29 29
Los Alamos n/a 1 1
Other - UC 48 1,068 1,116
Stanford 618
Other-Network UC n/a 2,173 2,173
_______ ______ _____
9,908 10,597 21,123
Number of FIND commands by database
MAGS database 18,594
NEWS database 1,929
COMP database 600
Total number of FIND commands 21,123
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 34,027 66,983 101,010
Davis 19,564 208 19,772
Irvine 16,371 0 16,371
Los Angeles 457 14,209 14,666
Riverside 3,703 3,013 6,716
San Diego 1,974 4,168 6,142
San Francisco 4,975 0 4,975
Santa Barbara 1,259 4,995 6,254
Santa Cruz 5,589 3,415 9,004
LBL 0 310 310
LLL 0 597 597
Los Alamos n/a 0 0
Other - UC 381 17,889 18,270
Stanford 735
Other-Network UC n/a 32,672 32,672
_______ ______ _____
88,300 148,459 237,494
Number of Records Displayed by database:
MAGS database 220,920
NEWS database 14,478
COMP database 6,512
Total number of Records Displayed 237,494
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.3%
Percent of NEWS sessions 10.7%
Percent of COMP sessions 3.0%
Percent of searches done in the MAGS database 88.0%
Percent of searches done in the NEWS database 9.1%
Percent of searches done in the COMP database 2.8%
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 3.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.2
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:10
Average session length (minutes:seconds) 11:03
Longest session recorded (minutes:seconds) 470:50
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 538.5
Retrievals per search - standard deviation 6595.2
Percent of searches completed with 0 results 30.4%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 57.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 17,530 28.6%
DISPLAY (excluding automatic displays) 22,766 37.1%
HELP 2,185 3.6%
EXPLAIN 1,446 2.4%
SET/RESET 2,261 3.7%
SHOW 312 0.5%
ADD ON (AND, OR, AND NOT) 1,064 1.7%
LOGON or LOGOFF 9,054 14.8%
COMMENT 0 0.0%
SAVE 1,256 2.0%
USE 12 0.0%
OTHER 3,409 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 3,452 19.1% 985 28.5% 11 75.3 276.6
TITLE WORD 3,927 21.7% 1,205 30.7% 11 360.4 2584.8
EXACT TITLE 604 3.3% 274 45.4% 1 65.6 618.7
JOURNAL 898 5.0% 397 44.2% 1,002 6566.1 34034.0
EXACT JOURNAL 419 2.3% 200 47.7% 629 4565.9 9585.0
SUBJECT 3,830 21.2% 1,476 38.5% 27 338.4 2977.3
EXACT SUBJECT 146 0.8% 52 35.6% 34 411.5 1747.6
KEYWORD 4,077 22.5% 806 19.8% 29 751.6 5612.5
SUBFILE 5 0.0% 1 20.0% 57 64.0 46.2
PUBLICATION TYPE 41 0.2% 8 19.5% 14 270.8 953.5
DATE 153 0.8% 33 21.6% 13 210.0 1040.8
ADDED 10 0.1% 1 10.0% 40,738 43172.2 19640.7
PERIODICAL 277 1.5% 46 16.6% 14 218.1 1214.5
EXACT PE 111 0.6% 16 14.4% 3 86.9 628.6
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 136 0.8% 34 25.0% 700 2790.5 6728.5
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 687 4.0% 209 30.4% 10 453.0 1651.0
Single 16,697 96.0% 5,110 30.6% 19 785.8 8238.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 62.3%
LONG 1.3%
FIELDS 1.2%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 31.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:20
Average session length (minutes:seconds) 12:17
Longest session recorded (minutes:seconds) 388:50
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 418.2
Retrievals per search - standard deviation 2213.8
Percent of searches completed with 0 results 32.2%
Percent of searches entered that are long 3.7%
Percent of long searches completed
(includes partial results) 81.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 519 26.9%
DISPLAY (excluding automatic displays) 689 35.7%
HELP 42 2.2%
EXPLAIN 40 2.1%
SET/RESET 98 5.1%
SHOW 18 0.9%
ADD ON (AND, OR, AND NOT) 81 4.2%
LOGON or LOGOFF 287 14.9%
COMMENT 0 0.0%
SAVE 30 1.6%
USE 0 0.0%
OTHER 126 6.5%
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 52 8.9% 27 51.9% 3 44.4 110.4
TITLE WORD 127 21.8% 33 26.0% 16 377.0 1017.2
EXACT TITLE 5 0.9% 4 80.0% 78 78.0 0.0
JOURNAL 11 1.9% 8 72.7% 11,579 16204.7 18445.7
EXACT JOURNAL 7 1.2% 3 42.9% 6,655 7369.0 7720.1
SUBJECT 105 18.0% 39 37.1% 33 534.4 1515.3
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 218 37.4% 57 26.1% 43 535.0 2182.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 1.2% 1 14.3% 20 64.7 107.5
DATE 40 6.9% 10 25.0% 13 108.6 301.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 4 0.7% 1 25.0% 20 19.0 13.5
EXACT PE 3 0.5% 0 0.0% 2 2.0 1.0
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 0.7% 0 0.0% 183 1073.0 1878.4
By number of indexes:
Multiple 63 12.2% 14 22.2% 18 258.8 1014.3
Single 452 87.8% 155 34.3% 32 735.2 3021.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.8%
SHORT 54.3%
LONG 1.5%
FIELDS 5.4%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 33.2%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 4,516
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 200
displays or when any of these paging options is set.
TEXT included with MAIL commands 920
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:42
Average session length (minutes:seconds) 9:33
Longest session recorded (minutes:seconds) 402:14
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 227.7
Retrievals per search - standard deviation 1617.5
Percent of searches completed with 0 results 33.8%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 51.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,852 37.2%
DISPLAY (excluding automatic displays) 1,115 22.4%
HELP 228 4.6%
EXPLAIN 162 3.3%
SET/RESET 393 7.9%
SHOW 23 0.5%
ADD ON (AND, OR, AND NOT) 77 1.5%
LOGON or LOGOFF 944 18.9%
COMMENT 0 0.0%
SAVE 10 0.2%
USE 2 0.0%
OTHER 176 3.5%
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 206 10.3% 80 38.8% 6 285.5 624.3
TITLE WORD 416 20.8% 132 31.7% 10 181.3 938.0
EXACT TITLE 227 11.3% 88 38.8% 1 5.2 24.0
JOURNAL 18 0.9% 9 50.0% 25 1555.9 3953.2
EXACT JOURNAL 36 1.8% 9 25.0% 26 93.9 184.1
SUBJECT 513 25.6% 217 42.3% 35 522.3 2637.8
EXACT SUBJECT 11 0.5% 4 36.4% 21 128.6 282.5
KEYWORD 373 18.6% 97 26.0% 20 598.2 2939.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.4% 5 62.5% 61 88.7 88.8
DATE 111 5.5% 24 21.6% 7 46.1 101.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 52 2.6% 8 15.4% 4 17.9 29.9
EXACT PE 28 1.4% 1 3.6% 3 8.7 13.3
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 1 0.0% 1 100% 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 160 8.7% 45 28.1% 7 59.4 170.7
Single 1,672 91.3% 585 35.0% 12 383.5 2126.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 43.4%
LONG 1.6%
FIELDS 1.5%
PERIODICALS 3.5%
COMMENTS 0.0%
Other 47.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.2%
Ten most frequent errors:
1. First word of command is invalid 37.7%
2. NS command - no next screen 23.1%
3. FIND command with invalid index name 14.2%
4. PS command - no previous screen 4.8%
5. DISPLAY command contains invalid word 2.6%
6. Search term missing from search command 2.6%
7. Valid command at an inappropriate time 2.4%
8. DISPLAY command - no FIND results 1.2%
9. MAIL command issued w/o email address 0.9%
10. NS of SHOW/EXP command-no next screen 0.8%
11. All others 9.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 26.0%
2. LOCATE (ARTICLE DBS) 23.6%
3. FIND 7.7%
4. COMMANDS 7.5%
5. INDEXES 6.2%
6. MAGS DATABASE 5.8%
7. Unrecognized term 3.8%
8. DISPLAYS (IAC DBS) 2.7%
9. ADDON SEARCH 2.2%
10. DATABASES 1.3%
11. All others 13.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.2%
2. First word of command is invalid 21.4%
3. FIND command with invalid index name 11.3%
4. DISPLAY command-first of >1 screen 5.8%
5. FIND command with zero results 5.6%
6. DISPLAY command-complete in one screen 5.0%
7. DISPLAY command - middle of >1 screen 4.1%
8. FIND command retrieves >1 book 2.4%
9. NS command - no next screen 2.4%
10. PS command - no previous screen 2.1%
11. All others 13.7%
Ten most frequent SHOW requests:
1. SEARCH 42.6%
2. HISTORY 29.4%
3. MAIL STATUS 7.9%
4. SYSTEM NEWS 3.5%
5. IAC NEWS 3.2%
6. SETTINGS (IAC DBS) 2.9%
7. GLOSSARY 2.9%
8. MAIL SETTINGS 2.6%
9. LIBRARY NEWS 1.5%
10. SYSTEM5 NEWS 0.6%
11. All others 2.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)