MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/01/99 through 11/30/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,209 3,530 6,739
Davis 2,532 103 2,635
Irvine 3,501 0 3,501
Los Angeles 290 2,172 2,462
Riverside 1,801 167 1,968
San Diego 379 322 701
San Francisco 420 14 434
Santa Barbara 1,309 585 1,894
Santa Cruz 3,533 664 4,197
LBL 0 86 86
LLL 0 34 34
Los Alamos n/a 5 5
Other - UC 41 802 843
Stanford 608
Other-Network UC n/a 1,323 1,323
_______ ______ _____
17,015 9,807 27,430
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 336 1,306 20,636
2-4 a.m. 115 571 8,297
4-6 a.m. 71 222 2,371
6-8 a.m. 217 636 9,233
8-10 a.m. 1,537 4,614 74,251
10-12 a.m. 3,893 11,952 127,213
12-2 p.m. 5,271 16,604 182,204
2-4 p.m. 6,043 19,801 204,878
4-6 p.m. 4,567 15,003 169,397
6-8 p.m. 2,422 8,543 93,076
8-10 p.m. 1,940 6,915 80,707
10-12 p.m. 1,018 3,768 42,191
__________ __________ __________ _________________
Total: 27,430 89,935 1,014,454
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 10,627 11,206 21,833
Davis 7,354 320 7,674
Irvine 11,600 0 11,600
Los Angeles 961 6,778 7,739
Riverside 6,561 431 6,992
San Diego 1,119 922 2,041
San Francisco 1,140 25 1,165
Santa Barbara 4,417 1,915 6,332
Santa Cruz 12,045 1,961 14,006
LBL 0 257 257
LLL 0 92 92
Los Alamos n/a 8 8
Other - UC 63 2,944 3,007
Stanford 2,173
Other-Network UC n/a 5,016 5,016
_______ ______ _____
55,887 31,875 89,935
Number of FIND commands by database
MAGS database 80,173
NEWS database 7,756
COMP database 2,006
Total number of FIND commands 89,935
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 127,636 139,981 267,617
Davis 69,448 1,982 71,430
Irvine 99,709 0 99,709
Los Angeles 12,976 87,882 100,858
Riverside 60,935 7,175 68,110
San Diego 9,255 34,726 43,981
San Francisco 15,691 535 16,226
Santa Barbara 46,561 24,803 71,364
Santa Cruz 110,801 20,159 130,960
LBL 0 2,971 2,971
LLL 0 1,345 1,345
Los Alamos n/a 236 236
Other - UC 722 48,832 49,554
Stanford 3,761
Other-Network UC n/a 63,683 63,683
_______ ______ _____
553,734 434,310 991,805
Number of Records Displayed by database:
MAGS database 910,819
NEWS database 66,033
COMP database 37,602
Total number of Records Displayed 991,805
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.7%
Percent of NEWS sessions 10.4%
Percent of COMP sessions 2.9%
Percent of searches done in the MAGS database 89.1%
Percent of searches done in the NEWS database 8.6%
Percent of searches done in the COMP database 2.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 4.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 4.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:18
Average session length (minutes:seconds) 12:50
Longest session recorded (minutes:seconds) 824:41
Average number of searches completed per session 3.3
Retrievals per search - median 5.0
Retrievals per search - average 540.8
Retrievals per search - standard deviation 6872.3
Percent of searches completed with 0 results 32.1%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 50.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 75,716 27.3%
DISPLAY (excluding automatic displays) 115,777 41.7%
HELP 10,450 3.8%
EXPLAIN 7,178 2.6%
SET/RESET 6,551 2.4%
SHOW 1,534 0.6%
ADD ON (AND, OR, AND NOT) 4,457 1.6%
LOGON or LOGOFF 35,699 12.9%
COMMENT 11 0.0%
SAVE 4,870 1.8%
USE 45 0.0%
OTHER 15,292 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 10,391 13.3% 3,004 28.9% 10 71.9 283.4
TITLE WORD 13,570 17.4% 4,341 32.0% 14 578.2 10457.0
EXACT TITLE 1,962 2.5% 969 49.4% 3 123.3 593.2
JOURNAL 3,651 4.7% 1,845 50.5% 847 5786.6 23809.7
EXACT JOURNAL 1,817 2.3% 842 46.3% 650 5202.0 14568.0
SUBJECT 20,167 25.8% 8,493 42.1% 38 377.7 1723.6
EXACT SUBJECT 1,040 1.3% 457 43.9% 51 454.0 1019.8
KEYWORD 22,283 28.5% 4,587 20.6% 29 867.4 8689.2
SUBFILE 55 0.1% 13 23.6% 24 158.4 437.5
PUBLICATION TYPE 124 0.2% 40 32.3% 17 601.8 4201.6
DATE 728 0.9% 187 25.7% 29 194.3 686.9
ADDED 15 0.0% 3 20.0% 5,624 7779.0 6772.2
PERIODICAL 1,388 1.8% 321 23.1% 7 207.7 1157.9
EXACT PE 430 0.6% 95 22.1% 4 32.6 103.9
RPE 2 0.0% 2 100% 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 481 0.6% 119 24.7% 147 2600.5 10336.7
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 3,027 4.0% 1,073 35.4% 13 430.6 2493.1
Single 71,876 96.0% 23,092 32.1% 24 846.1 8711.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 67.0%
LONG 1.2%
FIELDS 0.6%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 28.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:57
Average session length (minutes:seconds) 11:26
Longest session recorded (minutes:seconds) 138:33
Average number of searches completed per session 2.5
Retrievals per search - median 6.0
Retrievals per search - average 869.4
Retrievals per search - standard deviation 6370.7
Percent of searches completed with 0 results 31.8%
Percent of searches entered that are long 2.8%
Percent of long searches completed
(includes partial results) 60.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,808 25.0%
DISPLAY (excluding automatic displays) 2,845 39.3%
HELP 230 3.2%
EXPLAIN 220 3.0%
SET/RESET 301 4.2%
SHOW 50 0.7%
ADD ON (AND, OR, AND NOT) 198 2.7%
LOGON or LOGOFF 1,041 14.4%
COMMENT 0 0.0%
SAVE 131 1.8%
USE 0 0.0%
OTHER 415 5.7%
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 171 8.9% 95 55.6% 3 100.7 303.5
TITLE WORD 434 22.7% 137 31.6% 31 455.3 2262.4
EXACT TITLE 19 1.0% 14 73.7% 69 43.4 38.7
JOURNAL 73 3.8% 49 67.1% 2,917 10448.9 17899.1
EXACT JOURNAL 37 1.9% 15 40.5% 2,053 8748.6 21928.2
SUBJECT 345 18.0% 149 43.2% 42 883.8 3503.7
EXACT SUBJECT 23 1.2% 12 52.2% 106 743.1 1655.5
KEYWORD 701 36.6% 132 18.8% 67 1190.2 4957.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 0.5% 1 11.1% 83 1251.4 3197.7
DATE 55 2.9% 16 29.1% 20 198.1 601.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 14 0.7% 5 35.7% 14 369.3 801.1
EXACT PE 18 0.9% 1 5.6% 7 12.8 17.8
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 14 0.7% 4 28.6% 128 20018.2 61456.6
By number of indexes:
Multiple 112 6.3% 29 25.9% 34 612.2 3671.4
Single 1,673 93.7% 568 33.9% 48 1415.8 8204.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 65.4%
LONG 1.8%
FIELDS 1.5%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 27.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 18,860
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 1,038
displays or when any of these paging options is set.
TEXT included with MAIL commands 3,886
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:04
Average session length (minutes:seconds) 9:59
Longest session recorded (minutes:seconds) 153:07
Average number of searches completed per session 2.7
Retrievals per search - median 3.0
Retrievals per search - average 1938.4
Retrievals per search - standard deviation 31491
Percent of searches completed with 0 results 36.0%
Percent of searches entered that are long 2.4%
Percent of long searches completed
(includes partial results) 59.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,365 34.6%
DISPLAY (excluding automatic displays) 5,217 24.5%
HELP 1,203 5.6%
EXPLAIN 726 3.4%
SET/RESET 989 4.6%
SHOW 123 0.6%
ADD ON (AND, OR, AND NOT) 391 1.8%
LOGON or LOGOFF 3,960 18.6%
COMMENT 0 0.0%
SAVE 269 1.3%
USE 4 0.0%
OTHER 1,065 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 361 4.6% 184 51.0% 15 362.3 741.7
TITLE WORD 1,302 16.8% 413 31.7% 12 407.5 4253.4
EXACT TITLE 151 1.9% 96 63.6% 2 154.4 384.0
JOURNAL 129 1.7% 67 51.9% 335 177942 299905
EXACT JOURNAL 146 1.9% 70 47.9% 25 407.3 1327.4
SUBJECT 2,695 34.7% 1,210 44.9% 44 483.8 1326.7
EXACT SUBJECT 119 1.5% 71 59.7% 30 578.6 1063.9
KEYWORD 2,588 33.3% 639 24.7% 29 1287.5 8493.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 0.1% 4 44.4% 6 10.2 10.5
DATE 186 2.4% 38 20.4% 16 234.0 1319.0
ADDED 2 0.0% 1 50.0% 31 31.0 0.0
PERIODICAL 38 0.5% 17 44.7% 15 64.0 98.1
EXACT PE 24 0.3% 5 20.8% 6 19.8 24.9
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 20 0.3% 5 25.0% 12 38.4 52.2
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 449 6.2% 152 33.9% 14 312.1 1334.9
Single 6,823 93.8% 2,494 36.6% 29 3373.7 41802.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 50.2%
LONG 2.1%
FIELDS 0.7%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 43.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 14.9%
Ten most frequent errors:
1. First word of command is invalid 38.6%
2. NS command - no next screen 23.0%
3. FIND command with invalid index name 11.2%
4. PS command - no previous screen 5.4%
5. DISPLAY command contains invalid word 3.4%
6. Valid command at an inappropriate time 3.0%
7. Search term missing from search command 2.2%
8. MAIL command issued w/o email address 0.9%
9. DISPLAY command-record numbers too large 0.9%
10. DISPLAY command - no FIND results 0.8%
11. All others 10.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.5%
2. LOCATE (ARTICLE DBS) 22.6%
3. FIND 7.9%
4. COMMANDS 7.3%
5. INDEXES 5.0%
6. Unrecognized term 5.0%
7. MAGS DATABASE 4.7%
8. ADDON SEARCH 3.1%
9. DISPLAYS (IAC DBS) 3.1%
10. MAIL 2.3%
11. All others 15.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 21.7%
2. First word of command is invalid 19.9%
3. FIND command with invalid index name 10.0%
4. FIND command with zero results 6.5%
5. DISPLAY command-complete in one screen 5.7%
6. DISPLAY command - middle of >1 screen 5.5%
7. DISPLAY command-first of >1 screen 5.5%
8. FIND command retrieves >1 book 3.5%
9. NS command - no next screen 3.1%
10. PS command - no previous screen 2.4%
11. All others 16.1%
Ten most frequent SHOW requests:
1. SEARCH 43.0%
2. HISTORY 25.6%
3. MAIL STATUS 10.7%
4. MAIL SETTINGS 3.8%
5. IAC NEWS 3.4%
6. GLOSSARY 3.2%
7. SETTINGS (IAC DBS) 2.9%
8. SYSTEM NEWS 2.5%
9. DISPLAY 1.1%
10. DATABASES 0.4%
11. All others 3.5%