MELVYL IAC DATABASES TELNET STATISTICS
Time period: 07/01/00 through 07/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 712 1,344 2,056
Davis 735 50 785
Irvine 699 0 699
Los Angeles 62 563 625
Riverside 242 71 313
San Diego 231 201 432
San Francisco 295 0 295
Santa Barbara 353 404 757
Santa Cruz 269 119 388
LBL 0 63 63
LLL 0 13 13
Los Alamos n/a 3 3
Other - UC 22 123 145
Stanford 244
Other-Network UC n/a 580 580
_______ ______ _____
3,620 3,534 7,398
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 110 489 19,041
2-4 a.m. 44 177 2,073
4-6 a.m. 45 155 1,865
6-8 a.m. 84 199 2,068
8-10 a.m. 674 1,626 19,511
10-12 a.m. 1,384 4,051 66,432
12-2 p.m. 1,392 3,880 71,918
2-4 p.m. 1,619 4,603 93,404
4-6 p.m. 1,118 3,205 100,837
6-8 p.m. 447 1,466 26,891
8-10 p.m. 264 900 11,969
10-12 p.m. 217 903 11,523
__________ __________ __________ _________________
Total: 7,398 21,654 427,532
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,987 3,454 5,441
Davis 2,173 153 2,326
Irvine 1,807 0 1,807
Los Angeles 180 1,752 1,932
Riverside 745 169 914
San Diego 872 469 1,341
San Francisco 788 0 788
Santa Barbara 1,107 1,148 2,255
Santa Cruz 839 316 1,155
LBL 0 183 183
LLL 0 27 27
Los Alamos n/a 13 13
Other - UC 58 375 433
Stanford 945
Other-Network UC n/a 2,094 2,094
_______ ______ _____
10,556 10,153 21,654
Number of FIND commands by database
MAGS database 19,056
NEWS database 1,755
COMP database 843
Total number of FIND commands 21,654
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 18,526 42,871 61,397
Davis 24,556 1,383 25,939
Irvine 15,575 0 15,575
Los Angeles 1,650 25,829 27,479
Riverside 4,822 2,167 6,989
San Diego 8,492 18,313 26,805
San Francisco 9,158 0 9,158
Santa Barbara 13,988 13,338 27,326
Santa Cruz 10,232 3,884 14,116
LBL 0 1,793 1,793
LLL 0 961 961
Los Alamos n/a 156 156
Other - UC 719 4,267 4,986
Stanford 1,648
Other-Network UC n/a 47,945 47,945
_______ ______ _____
107,718 162,907 272,273
Number of Records Displayed by database:
MAGS database 394,390
NEWS database 12,484
COMP database 20,658
Total number of Records Displayed 272,273
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.1%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 4.7%
Percent of searches done in the MAGS database 88.0%
Percent of searches done in the NEWS database 8.1%
Percent of searches done in the COMP database 3.9%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 7.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 7.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:09
Average session length (minutes:seconds) 12:31
Longest session recorded (minutes:seconds) 502:28
Average number of searches completed per session 3.0
Retrievals per search - median 6.0
Retrievals per search - average 557.0
Retrievals per search - standard deviation 4576.3
Percent of searches completed with 0 results 28.6%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 54.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 17,831 27.4%
DISPLAY (excluding automatic displays) 27,012 41.5%
HELP 1,581 2.4%
EXPLAIN 1,192 1.8%
SET/RESET 2,258 3.5%
SHOW 261 0.4%
ADD ON (AND, OR, AND NOT) 1,225 1.9%
LOGON or LOGOFF 8,683 13.3%
COMMENT 0 0.0%
SAVE 1,182 1.8%
USE 23 0.0%
OTHER 3,843 5.9%
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 3,877 20.5% 1,058 27.3% 10 61.6 223.8
TITLE WORD 3,914 20.7% 1,074 27.4% 13 397.4 2196.1
EXACT TITLE 499 2.6% 206 41.3% 4 51.8 240.9
JOURNAL 908 4.8% 471 51.9% 716 5238.2 12753.8
EXACT JOURNAL 698 3.7% 246 35.2% 851 4477.2 9235.0
SUBJECT 3,167 16.7% 1,119 35.3% 26 288.1 886.9
EXACT SUBJECT 98 0.5% 31 31.6% 41 423.7 934.9
KEYWORD 4,589 24.3% 1,035 22.6% 27 863.4 6768.1
SUBFILE 2 0.0% 0 0.0% 29 29.0 0.0
PUBLICATION TYPE 54 0.3% 10 18.5% 10 298.1 1129.0
DATE 392 2.1% 103 26.3% 26 207.6 759.1
ADDED 16 0.1% 1 6.3% 36,165 33117.7 8041.9
PERIODICAL 368 1.9% 74 20.1% 10 282.3 1508.9
EXACT PE 144 0.8% 26 18.1% 4 70.2 250.0
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 192 1.0% 25 13.0% 504 2664.9 4923.9
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 1,164 6.6% 354 30.4% 16 569.8 2203.9
Single 16,533 93.4% 4,756 28.8% 18 806.1 5208.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
SHORT 63.4%
LONG 1.4%
FIELDS 0.6%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 30.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:18
Average session length (minutes:seconds) 9:30
Longest session recorded (minutes:seconds) 102:18
Average number of searches completed per session 2.4
Retrievals per search - median 3.5
Retrievals per search - average 1400.5
Retrievals per search - standard deviation 16731
Percent of searches completed with 0 results 33.7%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 754 23.2%
DISPLAY (excluding automatic displays) 1,075 33.1%
HELP 83 2.6%
EXPLAIN 88 2.7%
SET/RESET 130 4.0%
SHOW 12 0.4%
ADD ON (AND, OR, AND NOT) 89 2.7%
LOGON or LOGOFF 464 14.3%
COMMENT 0 0.0%
SAVE 304 9.4%
USE 0 0.0%
OTHER 247 7.6%
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 84 10.6% 53 63.1% 3 88.4 198.2
TITLE WORD 184 23.3% 65 35.3% 16 405.0 1863.8
EXACT TITLE 10 1.3% 7 70.0% 1 1.0 0.0
JOURNAL 25 3.2% 17 68.0% 2,093 7460.1 15251.2
EXACT JOURNAL 18 2.3% 6 33.3% 2,736 2404.3 2174.3
SUBJECT 168 21.3% 72 42.9% 33 1002.5 3343.0
EXACT SUBJECT 5 0.6% 2 40.0% 2 6.7 9.0
KEYWORD 247 31.3% 53 21.5% 54 4631.1 34401.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.3% 0 0.0% 29 29.0 38.2
DATE 21 2.7% 4 19.0% 19 402.9 957.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 15 1.9% 0 0.0% 2 9.9 16.1
EXACT PE 6 0.8% 0 0.0% 1 5.2 9.7
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 5 0.6% 3 60.0% 26 26.0 24.0
By number of indexes:
Multiple 37 4.9% 16 43.2% 17 328.2 870.7
Single 715 95.1% 250 35.0% 33 2424.7 22437.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 66.6%
LONG 1.4%
FIELDS 2.1%
PERIODICALS 1.4%
COMMENTS 0.0%
Other 26.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 5,928
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 433
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,271
SET DISPLAY TEXT commands 4
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:44
Average session length (minutes:seconds) 8:45
Longest session recorded (minutes:seconds) 105:10
Average number of searches completed per session 2.5
Retrievals per search - median 3.0
Retrievals per search - average 4181.7
Retrievals per search - standard deviation 67315
Percent of searches completed with 0 results 35.4%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 61.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,579 32.5%
DISPLAY (excluding automatic displays) 1,167 24.0%
HELP 168 3.5%
EXPLAIN 144 3.0%
SET/RESET 311 6.4%
SHOW 15 0.3%
ADD ON (AND, OR, AND NOT) 176 3.6%
LOGON or LOGOFF 854 17.6%
COMMENT 0 0.0%
SAVE 161 3.3%
USE 1 0.0%
OTHER 280 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 197 10.9% 102 51.8% 43 344.8 594.0
TITLE WORD 399 22.2% 129 32.3% 10 637.8 2282.5
EXACT TITLE 24 1.3% 14 58.3% 4 157.7 285.0
JOURNAL 32 1.8% 13 40.6% 337 238281 369602
EXACT JOURNAL 46 2.6% 13 28.3% 131 1027.4 3916.0
SUBJECT 476 26.4% 193 40.5% 25 503.7 2021.5
EXACT SUBJECT 13 0.7% 7 53.8% 131 426.5 559.6
KEYWORD 445 24.7% 107 24.0% 21 651.1 4161.5
SUBFILE 4 0.2% 2 50.0% 75 74.5 102.5
PUBLICATION TYPE 4 0.2% 2 50.0% 13 12.5 16.3
DATE 140 7.8% 34 24.3% 15 181.4 559.7
ADDED 3 0.2% 0 0.0% 68 66.7 3.2
PERIODICAL 1 0.1% 0 0.0% 11 11.0 0.0
EXACT PE 10 0.6% 1 10.0% 16 26.9 33.3
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 6 0.3% 3 50.0% 50 45.0 37.7
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 207 13.3% 56 27.1% 14 334.4 1900.0
Single 1,350 86.7% 502 37.2% 21 5951.0 64427.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.2%
SHORT 43.3%
LONG 4.1%
FIELDS 0.6%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 44.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.5%
Ten most frequent errors:
1. First word of command is invalid 34.8%
2. NS command - no next screen 25.7%
3. FIND command with invalid index name 12.1%
4. PS command - no previous screen 3.9%
5. DISPLAY command contains invalid word 3.6%
6. Valid command at an inappropriate time 2.3%
7. Search term missing from search command 2.3%
8. DISPLAY command - no FIND results 1.1%
9. MAIL command issued w/o email address 0.9%
10. DISPLAY command-record numbers too large 0.8%
11. All others 12.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 22.2%
2. LOCATE (ARTICLE DBS) 13.3%
3. FIND 11.4%
4. INDEXES 7.9%
5. COMMANDS 7.6%
6. Unrecognized term 5.1%
7. MAGS DATABASE 4.1%
8. ADDON SEARCH 2.3%
9. DATABASES 2.2%
10. MAIL 2.0%
11. All others 21.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.6%
2. First word of command is invalid 17.6%
3. FIND command with invalid index name 10.8%
4. FIND command with zero results 7.6%
5. DISPLAY command-first of >1 screen 5.0%
6. DISPLAY command-complete in one screen 4.0%
7. DISPLAY command - middle of >1 screen 3.7%
8. FIND command retrieves >1 book 3.3%
9. NS command - no next screen 2.8%
10. DISPLAY command - last of >1 screen 1.7%
11. All others 16.7%
Ten most frequent SHOW requests:
1. HISTORY 36.9%
2. SEARCH 34.3%
3. SETTINGS (IAC DBS) 5.9%
4. IAC NEWS 4.8%
5. GLOSSARY 4.1%
6. SYSTEM NEWS 3.7%
7. MAIL STATUS 3.7%
8. MAIL SETTINGS 1.5%
9. DISPLAY 0.7%
10. TAXONOMIC GUIDE 0.4%
11. All others 4.1%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)