MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/20/02 through 04/26/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 120 179 299
Davis 101 0 101
Irvine 93 0 93
Los Angeles 3 26 29
Riverside 3 4 7
San Diego 19 6 25
San Francisco 11 0 11
Santa Barbara 13 32 45
Santa Cruz 21 18 39
LBL 0 11 11
LLL 0 2 2
Los Alamos n/a 1 1
Other - UC 0 25 25
Stanford 4
Other-Network UC n/a 93 93
_______ ______ _____
384 397 785
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 18 46 516
2-4 a.m. 7 21 299
4-6 a.m. 0 0 0
6-8 a.m. 9 20 57
8-10 a.m. 54 172 2,281
10-12 a.m. 137 380 5,245
12-2 p.m. 143 354 2,474
2-4 p.m. 166 388 3,512
4-6 p.m. 126 302 3,828
6-8 p.m. 53 124 4,762
8-10 p.m. 46 185 2,355
10-12 p.m. 26 65 255
__________ __________ __________ _________________
Total: 785 2,057 25,584
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 330 473 803
Davis 193 0 193
Irvine 324 0 324
Los Angeles 35 60 95
Riverside 1 11 12
San Diego 19 6 25
San Francisco 22 0 22
Santa Barbara 30 127 157
Santa Cruz 44 46 90
LBL 0 21 21
LLL 0 4 4
Los Alamos n/a 1 1
Other - UC 0 100 100
Stanford 5
Other-Network UC n/a 205 205
_______ ______ _____
998 1,054 2,057
Number of FIND commands by database
MAGS database 1,809
NEWS database 183
COMP database 65
Total number of FIND commands 2,057
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,521 6,034 13,555
Davis 1,386 0 1,386
Irvine 1,505 0 1,505
Los Angeles 342 523 865
Riverside 0 76 76
San Diego 206 159 365
San Francisco 37 0 37
Santa Barbara 233 485 718
Santa Cruz 148 381 529
LBL 0 236 236
LLL 0 1,690 1,690
Los Alamos n/a 25 25
Other - UC 0 1,576 1,576
Stanford 6
Other-Network UC n/a 2,840 2,840
_______ ______ _____
11,378 14,025 25,409
Number of Records Displayed by database:
MAGS database 19,009
NEWS database 2,071
COMP database 4,504
Total number of Records Displayed 25,409
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.0%
Percent of NEWS sessions 10.2%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 87.9%
Percent of searches done in the NEWS database 8.9%
Percent of searches done in the COMP database 3.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.3
Standard deviation in seconds 1.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.0
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:58
Average session length (minutes:seconds) 13:30
Longest session recorded (minutes:seconds) 416:40
Average number of searches completed per session 2.7
Retrievals per search - median 4.0
Retrievals per search - average 342.7
Retrievals per search - standard deviation 2036.9
Percent of searches completed with 0 results 30.6%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 63.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,741 30.0%
DISPLAY (excluding automatic displays) 2,051 35.4%
HELP 187 3.2%
EXPLAIN 138 2.4%
SET/RESET 275 4.7%
SHOW 18 0.3%
ADD ON (AND, OR, AND NOT) 68 1.2%
LOGON or LOGOFF 861 14.8%
COMMENT 0 0.0%
SAVE 90 1.6%
USE 1 0.0%
OTHER 369 6.4%
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 360 20.2% 99 27.5% 8 42.8 140.7
TITLE WORD 495 27.8% 147 29.7% 18 413.3 2042.9
EXACT TITLE 107 6.0% 33 30.8% 1 4.4 12.2
JOURNAL 73 4.1% 41 56.2% 909 4101.0 8685.8
EXACT JOURNAL 53 3.0% 21 39.6% 647 2701.2 4207.2
SUBJECT 340 19.1% 110 32.4% 32 278.8 877.1
EXACT SUBJECT 22 1.2% 8 36.4% 57 202.9 470.0
KEYWORD 241 13.6% 56 23.2% 32 941.1 3407.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 21 21.0 0.0
DATE 16 0.9% 2 12.5% 21 56.3 92.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 23 1.3% 5 21.7% 4 8.4 11.6
EXACT PE 34 1.9% 6 17.6% 3 7.9 13.6
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 13 0.7% 8 61.5% 64 180.4 178.1
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 45 2.6% 12 26.7% 28 59.2 102.7
Single 1,686 97.4% 512 30.4% 16 521.5 2503.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
SHORT 59.5%
LONG 1.0%
FIELDS 1.0%
PERIODICALS 2.2%
COMMENTS 0.0%
Other 33.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:47
Average session length (minutes:seconds) 20:29
Longest session recorded (minutes:seconds) 193:44
Average number of searches completed per session 2.1
Retrievals per search - median 3.0
Retrievals per search - average 833.4
Retrievals per search - standard deviation 2496.1
Percent of searches completed with 0 results 39.1%
Percent of searches entered that are long 7.7%
Percent of long searches completed
(includes partial results) 80.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 55 29.6%
DISPLAY (excluding automatic displays) 35 18.8%
HELP 7 3.8%
EXPLAIN 4 2.2%
SET/RESET 15 8.1%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 10 5.4%
LOGON or LOGOFF 34 18.3%
COMMENT 0 0.0%
SAVE 17 9.1%
USE 0 0.0%
OTHER 9 4.8%
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 5 8.3% 3 60.0% 34 33.5 44.5
TITLE WORD 28 46.7% 16 57.1% 123 1323.8 3682.7
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 1.7% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 11 18.3% 5 45.5% 405 1359.0 1797.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 8 13.3% 0 0.0% 421 2226.9 3608.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 8.3% 1 20.0% 1,093 2723.8 4055.8
DATE 1 1.7% 0 0.0% 2 2.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.7% 0 0.0% 1 1.0 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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 6 11.1% 1 16.7% 197 2179.4 3717.3
Single 48 88.9% 24 50.0% 136 1292.7 3015.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.6%
SHORT 52.4%
LONG 0.0%
FIELDS 2.4%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 40.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 450
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 47
displays or when any of these paging options is set.
TEXT included with MAIL commands 166
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:35
Average session length (minutes:seconds) 10:03
Longest session recorded (minutes:seconds) 78:51
Average number of searches completed per session 2.2
Retrievals per search - median 1.0
Retrievals per search - average 865.1
Retrievals per search - standard deviation 4290.1
Percent of searches completed with 0 results 39.1%
Percent of searches entered that are long 8.7%
Percent of long searches completed
(includes partial results) 43.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 179 35.3%
DISPLAY (excluding automatic displays) 130 25.6%
HELP 19 3.7%
EXPLAIN 18 3.6%
SET/RESET 39 7.7%
SHOW 2 0.4%
ADD ON (AND, OR, AND NOT) 4 0.8%
LOGON or LOGOFF 94 18.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 22 4.3%
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 18 9.8% 4 22.2% 49 299.2 601.2
TITLE WORD 22 12.0% 9 40.9% 8 190.6 401.4
EXACT TITLE 21 11.5% 7 33.3% 1 1.9 2.6
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 8 4.4% 4 50.0% 117 377.5 606.1
SUBJECT 62 33.9% 31 50.0% 280 1908.1 3446.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 29 15.8% 10 34.5% 280 4402.1 11708.1
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 6 3.3% 1 16.7% 208 149.8 94.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 12 6.6% 3 25.0% 4 17.4 34.9
EXACT PE 4 2.2% 0 0.0% 3 3.3 2.6
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 1 0.5% 0 0.0% 43 43.0 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 12 7.1% 2 16.7% 159 242.8 386.5
Single 158 92.9% 65 41.1% 15 1579.5 5785.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 42.1%
LONG 1.1%
FIELDS 5.5%
PERIODICALS 7.3%
COMMENTS 0.0%
Other 41.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.5%
Ten most frequent errors:
1. First word of command is invalid 41.0%
2. NS command - no next screen 20.1%
3. FIND command with invalid index name 15.6%
4. PS command - no previous screen 3.4%
5. Valid command at an inappropriate time 3.1%
6. DISPLAY command contains invalid word 2.8%
7. Search term missing from search command 2.1%
8. DISPLAY command - no FIND results 1.5%
9. NS of SHOW/EXP command-no next screen 0.8%
10. DISPLAY command-record numbers too large 0.7%
11. All others 9.0%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 28.8%
2. GUIDE 24.4%
3. COMMANDS 8.8%
4. FIND 7.5%
5. MAGS DATABASE 6.9%
6. INDEXES 6.9%
7. Unrecognized term 3.8%
8. FIND LOCATION 2.5%
9. DISPLAYS (IAC DBS) 1.9%
10. DATABASES 1.9%
11. All others 6.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.4%
2. First word of command is invalid 21.7%
3. FIND command with invalid index name 10.7%
4. FIND command with zero results 6.4%
5. DISPLAY command - middle of >1 screen 5.6%
6. DISPLAY command-complete in one screen 5.4%
7. DISPLAY command-first of >1 screen 5.1%
8. FIND command retrieves 1 book 1.9%
9. PS command - no previous screen 1.6%
10. DISPLAY command - last of >1 screen 1.3%
11. All others 11.8%
Ten most frequent SHOW requests:
1. HISTORY 40.0%
2. SEARCH 30.0%
3. IAC NEWS 20.0%
4. TIMEOUT SETTING 5.0%
5. MAIL STATUS 5.0%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)