MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/22/02 through 06/28/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 34 84 118
Davis 31 0 31
Irvine 39 0 39
Los Angeles 1 41 42
Riverside 3 7 10
San Diego 29 18 47
San Francisco 11 0 11
Santa Barbara 3 7 10
Santa Cruz 5 3 8
LBL 0 6 6
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 3 11 14
Stanford 1
Other-Network UC n/a 56 56
_______ ______ _____
159 236 396
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 10 17 202
2-4 a.m. 10 14 100
4-6 a.m. 0 0 0
6-8 a.m. 16 23 142
8-10 a.m. 47 103 993
10-12 a.m. 70 136 2,094
12-2 p.m. 81 243 2,626
2-4 p.m. 94 220 3,060
4-6 p.m. 45 146 2,555
6-8 p.m. 6 14 356
8-10 p.m. 13 23 122
10-12 p.m. 4 6 16
__________ __________ __________ _________________
Total: 396 945 12,266
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 69 223 292
Davis 77 0 77
Irvine 84 0 84
Los Angeles 0 166 166
Riverside 5 10 15
San Diego 49 29 78
San Francisco 16 0 16
Santa Barbara 11 14 25
Santa Cruz 24 4 28
LBL 0 18 18
LLL 0 18 18
Los Alamos n/a 0 0
Other - UC 7 17 24
Stanford 0
Other-Network UC n/a 104 104
_______ ______ _____
342 603 945
Number of FIND commands by database
MAGS database 835
NEWS database 90
COMP database 20
Total number of FIND commands 945
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 651 2,411 3,062
Davis 637 0 637
Irvine 458 0 458
Los Angeles 0 1,544 1,544
Riverside 0 168 168
San Diego 902 149 1,051
San Francisco 203 0 203
Santa Barbara 136 227 363
Santa Cruz 282 24 306
LBL 0 240 240
LLL 0 1,251 1,251
Los Alamos n/a 0 0
Other - UC 62 128 190
Stanford 0
Other-Network UC n/a 2,793 2,793
_______ ______ _____
3,331 8,935 12,266
Number of Records Displayed by database:
MAGS database 10,946
NEWS database 1,210
COMP database 110
Total number of Records Displayed 12,266
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.6%
Percent of NEWS sessions 7.6%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 88.4%
Percent of searches done in the NEWS database 9.5%
Percent of searches done in the COMP database 2.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 2.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.2
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:37
Average session length (minutes:seconds) 19:01
Longest session recorded (minutes:seconds) 579:31
Average number of searches completed per session 2.3
Retrievals per search - median 7.0
Retrievals per search - average 700.4
Retrievals per search - standard deviation 7674.3
Percent of searches completed with 0 results 25.2%
Percent of searches entered that are long 2.9%
Percent of long searches completed
(includes partial results) 29.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 770 24.3%
DISPLAY (excluding automatic displays) 1,432 45.1%
HELP 57 1.8%
EXPLAIN 38 1.2%
SET/RESET 179 5.6%
SHOW 9 0.3%
ADD ON (AND, OR, AND NOT) 65 2.0%
LOGON or LOGOFF 419 13.2%
COMMENT 0 0.0%
SAVE 37 1.2%
USE 1 0.0%
OTHER 165 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 212 26.2% 46 21.7% 16 64.9 147.2
TITLE WORD 163 20.2% 51 31.3% 16 163.9 589.6
EXACT TITLE 22 2.7% 9 40.9% 7 34.3 67.0
JOURNAL 43 5.3% 16 37.2% 3,455 2804.0 2393.6
EXACT JOURNAL 22 2.7% 11 50.0% 1,022 7587.1 17457.0
SUBJECT 132 16.3% 32 24.2% 33 131.3 387.3
EXACT SUBJECT 6 0.7% 1 16.7% 11 23.4 29.7
KEYWORD 140 17.3% 37 26.4% 14 3557.0 20529.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.5% 1 25.0% 4 47.0 74.5
DATE 10 1.2% 4 40.0% 18 579.5 1264.8
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 35 4.3% 2 5.7% 3 17.8 32.6
EXACT PE 13 1.6% 0 0.0% 1 17.4 49.6
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 6 0.7% 0 0.0% 11 19.0 21.7
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 46 6.1% 18 39.1% 11 151.8 591.4
Single 714 93.9% 174 24.4% 21 1045.2 9416.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.7%
SHORT 60.2%
LONG 2.3%
FIELDS 3.9%
PERIODICALS 3.7%
COMMENTS 0.0%
Other 27.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 1:27
Average session length (minutes:seconds) 3:02
Longest session recorded (minutes:seconds) 12:20
Average number of searches completed per session 1.3
Retrievals per search - median 0.0
Retrievals per search - average 2232.1
Retrievals per search - standard deviation 8425.2
Percent of searches completed with 0 results 55.0%
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 20 27.0%
DISPLAY (excluding automatic displays) 21 28.4%
HELP 1 1.4%
EXPLAIN 6 8.1%
SET/RESET 5 6.8%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 19 25.7%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 2 2.7%
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 4 18.2% 3 75.0% 2 2.0 0.0
TITLE WORD 6 27.3% 2 33.3% 3 3.8 3.1
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 4.5% 1 100% 0 0.0 0.0
EXACT JOURNAL 3 13.6% 2 66.7% 37,357 37357.0 0.0
SUBJECT 2 9.1% 1 50.0% 7,265 7265.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 4 18.2% 2 50.0% 1 1.0 0.0
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 2 9.1% 2 100% 0 0.0 0.0
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 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 2 10.0% 2 100% 0 0.0 0.0
Single 18 90.0% 9 50.0% 2 4960.1 12384.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 15.2%
SHORT 51.5%
LONG 3.0%
FIELDS 3.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 27.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 284
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 21
displays or when any of these paging options is set.
TEXT included with MAIL commands 24
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:04
Average session length (minutes:seconds) 14:46
Longest session recorded (minutes:seconds) 63:29
Average number of searches completed per session 3.0
Retrievals per search - median 3.5
Retrievals per search - average 6428.7
Retrievals per search - standard deviation 56384
Percent of searches completed with 0 results 31.1%
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 86 28.4%
DISPLAY (excluding automatic displays) 145 47.9%
HELP 4 1.3%
EXPLAIN 1 0.3%
SET/RESET 18 5.9%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 4 1.3%
LOGON or LOGOFF 33 10.9%
COMMENT 0 0.0%
SAVE 1 0.3%
USE 0 0.0%
OTHER 10 3.3%
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 10 10.5% 4 40.0% 2 125.8 214.0
TITLE WORD 18 18.9% 6 33.3% 4 65.2 164.3
EXACT TITLE 5 5.3% 4 80.0% 1 1.0 0.0
JOURNAL 1 1.1% 0 0.0% 534298 534298 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 4 4.2% 2 50.0% 69 69.0 63.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 39 41.1% 11 28.2% 32 284.9 683.6
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 6.3% 1 16.7% 47 90.8 135.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 12 12.6% 2 16.7% 5 14.4 18.0
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
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 9 10.5% 2 22.2% 9 65.1 118.9
Single 77 89.5% 26 33.8% 16 10659.6 74792.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.7%
SHORT 60.9%
LONG 0.0%
FIELDS 1.3%
PERIODICALS 8.2%
COMMENTS 0.0%
Other 27.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 9.3%
Ten most frequent errors:
1. First word of command is invalid 32.2%
2. NS command - no next screen 30.9%
3. FIND command with invalid index name 13.9%
4. DISPLAY command contains invalid word 4.4%
5. PS command - no previous screen 2.5%
6. Search term missing from search command 1.9%
7. Valid command at an inappropriate time 1.1%
8. NS of SHOW/EXP command-no next screen 1.1%
9. 754 1.1%
10. 790 1.1%
11. All others 9.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 33.3%
2. LOCATE (ARTICLE DBS) 11.1%
3. MAGS DATABASE 8.9%
4. Unrecognized term 8.9%
5. FIND 6.7%
6. COMMANDS 6.7%
7. A044 4.4%
8. INDEXES 2.2%
9. A014 2.2%
10. A016 2.2%
11. All others 13.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.0%
2. First word of command is invalid 20.6%
3. FIND command with invalid index name 14.0%
4. FIND command with zero results 11.2%
5. FIND command retrieves >1 book 4.7%
6. PS command - no previous screen 3.7%
7. DISPLAY command-first of >1 screen 3.7%
8. DISPLAY command - middle of >1 screen 2.8%
9. DISPLAY command contains invalid word 1.9%
10. DISPLAY command-complete in one screen 1.9%
11. All others 6.5%
Ten most frequent SHOW requests:
1. IAC NEWS 44.4%
2. HISTORY 44.4%
3. SEARCH 11.1%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)