MELVYL IAC DATABASES TELNET STATISTICS
Time period: 07/28/01 through 08/03/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 51 252 303
Davis 123 2 125
Irvine 83 0 83
Los Angeles 2 49 51
Riverside 17 20 37
San Diego 4 18 22
San Francisco 29 0 29
Santa Barbara 17 18 35
Santa Cruz 18 9 27
LBL 0 17 17
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 1 23 24
Stanford 37
Other-Network UC n/a 55 55
_______ ______ _____
345 464 846
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 15 46 442
2-4 a.m. 3 6 58
4-6 a.m. 7 28 706
6-8 a.m. 27 65 454
8-10 a.m. 104 302 3,838
10-12 a.m. 159 484 4,945
12-2 p.m. 135 317 2,913
2-4 p.m. 182 493 4,750
4-6 p.m. 102 267 2,638
6-8 p.m. 64 198 949
8-10 p.m. 31 107 1,614
10-12 p.m. 17 64 1,070
__________ __________ __________ _________________
Total: 846 2,377 24,377
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 104 619 723
Davis 352 4 356
Irvine 277 0 277
Los Angeles 2 161 163
Riverside 47 54 101
San Diego 10 27 37
San Francisco 74 0 74
Santa Barbara 51 49 100
Santa Cruz 47 20 67
LBL 0 90 90
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 1 54 55
Stanford 155
Other-Network UC n/a 178 178
_______ ______ _____
965 1,257 2,377
Number of FIND commands by database
MAGS database 2,037
NEWS database 202
COMP database 138
Total number of FIND commands 2,377
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,461 6,467 7,928
Davis 2,568 101 2,669
Irvine 1,764 0 1,764
Los Angeles 3 2,218 2,221
Riverside 185 475 660
San Diego 38 158 196
San Francisco 754 0 754
Santa Barbara 499 354 853
Santa Cruz 123 263 386
LBL 0 1,839 1,839
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 15 902 917
Stanford 268
Other-Network UC n/a 2,539 2,539
_______ ______ _____
7,410 15,316 22,994
Number of Records Displayed by database:
MAGS database 21,340
NEWS database 1,069
COMP database 1,968
Total number of Records Displayed 22,994
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 83.9%
Percent of NEWS sessions 11.2%
Percent of COMP sessions 4.8%
Percent of searches done in the MAGS database 85.7%
Percent of searches done in the NEWS database 8.5%
Percent of searches done in the COMP database 5.8%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
Standard deviation in seconds 1.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:53
Average session length (minutes:seconds) 12:41
Longest session recorded (minutes:seconds) 274:30
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 892.3
Retrievals per search - standard deviation 20144
Percent of searches completed with 0 results 28.5%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 47.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,869 28.8%
DISPLAY (excluding automatic displays) 2,496 38.4%
HELP 152 2.3%
EXPLAIN 94 1.4%
SET/RESET 315 4.9%
SHOW 16 0.2%
ADD ON (AND, OR, AND NOT) 168 2.6%
LOGON or LOGOFF 869 13.4%
COMMENT 0 0.0%
SAVE 163 2.5%
USE 1 0.0%
OTHER 349 5.4%
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 490 25.3% 126 25.7% 10 62.0 222.1
TITLE WORD 470 24.3% 142 30.2% 10 302.0 1658.4
EXACT TITLE 66 3.4% 35 53.0% 6 333.0 1006.0
JOURNAL 97 5.0% 35 36.1% 1,754 7882.1 15364.7
EXACT JOURNAL 51 2.6% 30 58.8% 800 2241.5 4695.3
SUBJECT 258 13.3% 72 27.9% 33 247.7 644.5
EXACT SUBJECT 26 1.3% 5 19.2% 68 230.0 280.2
KEYWORD 402 20.8% 93 23.1% 24 3507.9 50916.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 8 8.0 0.0
DATE 25 1.3% 4 16.0% 6 267.0 869.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 29 1.5% 4 13.8% 10 118.6 296.0
EXACT PE 12 0.6% 2 16.7% 3 12.5 28.8
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 8 0.4% 1 12.5% 2,916 4481.3 3445.0
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 76 4.1% 18 23.7% 9 781.5 1960.8
Single 1,780 95.9% 511 28.7% 16 1380.6 25421.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 62.2%
LONG 1.4%
FIELDS 1.0%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 31.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:55
Average session length (minutes:seconds) 13:09
Longest session recorded (minutes:seconds) 91:09
Average number of searches completed per session 3.4
Retrievals per search - median 19.0
Retrievals per search - average 836.1
Retrievals per search - standard deviation 3997.7
Percent of searches completed with 0 results 26.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 122 22.6%
DISPLAY (excluding automatic displays) 264 49.0%
HELP 6 1.1%
EXPLAIN 12 2.2%
SET/RESET 16 3.0%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 16 3.0%
LOGON or LOGOFF 53 9.8%
COMMENT 0 0.0%
SAVE 22 4.1%
USE 0 0.0%
OTHER 28 5.2%
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 8 6.3% 7 87.5% 12 12.0 0.0
TITLE WORD 14 10.9% 8 57.1% 14 205.0 450.1
EXACT TITLE 1 0.8% 1 100% 0 0.0 0.0
JOURNAL 3 2.3% 2 66.7% 3,311 3311.0 0.0
EXACT JOURNAL 4 3.1% 0 0.0% 823 1262.0 1445.4
SUBJECT 24 18.8% 9 37.5% 13 356.5 1283.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 68 53.1% 6 8.8% 131 1620.0 5838.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 4 3.1% 0 0.0% 63 115.3 145.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 2 1.6% 0 0.0% 3 2.5 2.1
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 6 4.9% 0 0.0% 95 643.8 1311.5
Single 116 95.1% 33 28.4% 58 1302.8 5095.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.6%
SHORT 65.3%
LONG 2.1%
FIELDS 0.0%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 25.2%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 500
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 22
displays or when any of these paging options is set.
TEXT included with MAIL commands 97
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:18
Average session length (minutes:seconds) 9:00
Longest session recorded (minutes:seconds) 35:33
Average number of searches completed per session 2.1
Retrievals per search - median 1.0
Retrievals per search - average 203.5
Retrievals per search - standard deviation 1109.1
Percent of searches completed with 0 results 39.1%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 188 34.1%
DISPLAY (excluding automatic displays) 123 22.3%
HELP 21 3.8%
EXPLAIN 18 3.3%
SET/RESET 24 4.4%
SHOW 5 0.9%
ADD ON (AND, OR, AND NOT) 14 2.5%
LOGON or LOGOFF 144 26.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 1 0.2%
OTHER 13 2.4%
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 12.7% 10 38.5% 4 196.8 403.6
TITLE WORD 87 42.6% 26 29.9% 9 401.3 1902.1
EXACT TITLE 2 1.0% 2 100% 0 0.0 0.0
JOURNAL 4 2.0% 4 100% 0 0.0 0.0
EXACT JOURNAL 1 0.5% 1 100% 0 0.0 0.0
SUBJECT 22 10.8% 10 45.5% 4 102.7 334.0
EXACT SUBJECT 4 2.0% 2 50.0% 43 43.0 55.2
KEYWORD 46 22.5% 13 28.3% 11 252.2 510.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 9 4.4% 1 11.1% 15 15.6 12.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.0% 2 100% 0 0.0 0.0
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 1 0.5% 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 16 8.5% 1 6.3% 3 9.3 11.4
Single 172 91.5% 70 40.7% 10 363.8 1503.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
SHORT 50.0%
LONG 2.1%
FIELDS 0.7%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 45.8%
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 32.9%
2. NS command - no next screen 30.9%
3. FIND command with invalid index name 12.0%
4. DISPLAY command contains invalid word 3.6%
5. PS command - no previous screen 3.3%
6. Search term missing from search command 1.6%
7. DISPLAY command-record numbers too large 1.3%
8. DISPLAY command - no FIND results 1.2%
9. Add-on search, no index name after verb 0.9%
10. MAIL command issued w/o email address 0.9%
11. All others 11.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 28.2%
2. FIND 10.5%
3. LOCATE (ARTICLE DBS) 9.7%
4. INDEXES 8.1%
5. MAGS DATABASE 7.3%
6. COMMANDS 6.5%
7. DISPLAYS (IAC DBS) 3.2%
8. Unrecognized term 3.2%
9. A040 2.4%
10. Unrecognized term-reminders off 2.4%
11. All others 18.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 22.4%
2. First word of command is invalid 20.1%
3. FIND command with invalid index name 12.9%
4. DISPLAY command-first of >1 screen 5.3%
5. DISPLAY command - middle of >1 screen 5.0%
6. NS command - no next screen 4.3%
7. DISPLAY command - last of >1 screen 4.3%
8. FIND command with zero results 4.0%
9. PS command - no previous screen 3.3%
10. DISPLAY command-complete in one screen 3.0%
11. All others 15.5%
Ten most frequent SHOW requests:
1. SEARCH 28.6%
2. HISTORY 23.8%
3. IAC NEWS 19.0%
4. SETTINGS (IAC DBS) 9.5%
5. MAIL STATUS 9.5%
6. BOOKS DISPLAY 4.8%
7. DATABASES 4.8%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)