MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/11/02 through 05/17/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 70 186 256
Davis 80 0 80
Irvine 64 0 64
Los Angeles 1 54 55
Riverside 12 6 18
San Diego 18 13 31
San Francisco 7 0 7
Santa Barbara 8 11 19
Santa Cruz 5 20 25
LBL 0 4 4
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 0 30 30
Stanford 0
Other-Network UC n/a 54 54
_______ ______ _____
265 381 646
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 6 15 109
2-4 a.m. 6 13 299
4-6 a.m. 0 0 0
6-8 a.m. 5 16 307
8-10 a.m. 58 151 1,512
10-12 a.m. 93 253 2,772
12-2 p.m. 114 277 3,197
2-4 p.m. 110 231 3,138
4-6 p.m. 109 227 3,503
6-8 p.m. 52 92 1,277
8-10 p.m. 65 154 1,570
10-12 p.m. 28 72 800
__________ __________ __________ _________________
Total: 646 1,501 18,484
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 153 378 531
Davis 167 0 167
Irvine 139 0 139
Los Angeles 20 125 145
Riverside 28 12 40
San Diego 56 20 76
San Francisco 11 0 11
Santa Barbara 27 22 49
Santa Cruz 11 67 78
LBL 0 19 19
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 0 64 64
Stanford 0
Other-Network UC n/a 179 179
_______ ______ _____
612 889 1,501
Number of FIND commands by database
MAGS database 1,361
NEWS database 93
COMP database 47
Total number of FIND commands 1,501
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,898 5,446 7,344
Davis 1,681 0 1,681
Irvine 1,947 0 1,947
Los Angeles 370 2,086 2,456
Riverside 262 81 343
San Diego 318 312 630
San Francisco 44 0 44
Santa Barbara 92 133 225
Santa Cruz 114 520 634
LBL 0 166 166
LLL 0 10 10
Los Alamos n/a 0 0
Other - UC 0 539 539
Stanford 0
Other-Network UC n/a 2,465 2,465
_______ ______ _____
6,726 11,758 18,484
Number of Records Displayed by database:
MAGS database 17,331
NEWS database 914
COMP database 239
Total number of Records Displayed 18,484
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.3%
Percent of NEWS sessions 7.7%
Percent of COMP sessions 2.9%
Percent of searches done in the MAGS database 90.7%
Percent of searches done in the NEWS database 6.2%
Percent of searches done in the COMP database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:27
Average session length (minutes:seconds) 11:37
Longest session recorded (minutes:seconds) 229:03
Average number of searches completed per session 2.3
Retrievals per search - median 6.0
Retrievals per search - average 406.4
Retrievals per search - standard deviation 3780.7
Percent of searches completed with 0 results 26.7%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 57.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,299 25.2%
DISPLAY (excluding automatic displays) 1,980 38.4%
HELP 147 2.9%
EXPLAIN 108 2.1%
SET/RESET 218 4.2%
SHOW 14 0.3%
ADD ON (AND, OR, AND NOT) 62 1.2%
LOGON or LOGOFF 792 15.4%
COMMENT 0 0.0%
SAVE 192 3.7%
USE 1 0.0%
OTHER 340 6.6%
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 341 24.5% 92 27.0% 9 34.0 140.0
TITLE WORD 247 17.7% 79 32.0% 11 126.9 458.8
EXACT TITLE 18 1.3% 9 50.0% 6 6.0 4.2
JOURNAL 22 1.6% 10 45.5% 3,536 15647.6 31033.3
EXACT JOURNAL 20 1.4% 5 25.0% 7,859 11102.1 14445.6
SUBJECT 233 16.7% 88 37.8% 14 222.8 657.1
EXACT SUBJECT 38 2.7% 7 18.4% 8 351.4 987.7
KEYWORD 351 25.2% 50 14.2% 27 367.2 1806.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.1% 0 0.0% 6 6.0 0.0
DATE 75 5.4% 10 13.3% 6 92.3 287.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 22 1.6% 4 18.2% 15 306.5 577.6
EXACT PE 14 1.0% 1 7.1% 33 105.0 222.1
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 11 0.8% 4 36.4% 110 377.9 737.4
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 102 7.9% 18 17.6% 7 103.6 333.1
Single 1,184 92.1% 320 27.0% 18 620.4 4708.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 60.6%
LONG 1.6%
FIELDS 0.7%
PERIODICALS 2.1%
COMMENTS 0.0%
Other 30.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:53
Average session length (minutes:seconds) 6:08
Longest session recorded (minutes:seconds) 20:55
Average number of searches completed per session 2.5
Retrievals per search - median 1.0
Retrievals per search - average 650.7
Retrievals per search - standard deviation 2417.1
Percent of searches completed with 0 results 48.9%
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 47 37.3%
DISPLAY (excluding automatic displays) 24 19.0%
HELP 5 4.0%
EXPLAIN 9 7.1%
SET/RESET 6 4.8%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 27 21.4%
COMMENT 0 0.0%
SAVE 1 0.8%
USE 0 0.0%
OTHER 7 5.6%
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 4 8.2% 4 100% 0 0.0 0.0
TITLE WORD 13 26.5% 5 38.5% 33 308.9 715.7
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 5 10.2% 2 40.0% 1,462 4707.3 6924.1
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 19 38.8% 11 57.9% 349 372.5 406.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 6 12.2% 1 16.7% 23 2201.0 4884.7
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 1 2.0% 0 0.0% 1,462 1462.0 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 1 2.0% 0 0.0% 9 9.0 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 4.3% 0 0.0% 732 732.0 1032.4
Single 45 95.7% 23 51.1% 33 1323.7 3436.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.3%
SHORT 35.2%
LONG 3.7%
FIELDS 0.0%
PERIODICALS 3.7%
COMMENTS 0.0%
Other 48.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 378
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 31
displays or when any of these paging options is set.
TEXT included with MAIL commands 112
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:12
Average session length (minutes:seconds) 12:53
Longest session recorded (minutes:seconds) 130:34
Average number of searches completed per session 1.8
Retrievals per search - median 2.0
Retrievals per search - average 49.7
Retrievals per search - standard deviation 190.6
Percent of searches completed with 0 results 35.2%
Percent of searches entered that are long 5.4%
Percent of long searches completed
(includes partial results) 60.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 90 33.0%
DISPLAY (excluding automatic displays) 66 24.2%
HELP 14 5.1%
EXPLAIN 9 3.3%
SET/RESET 26 9.5%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 3 1.1%
LOGON or LOGOFF 53 19.4%
COMMENT 0 0.0%
SAVE 2 0.7%
USE 0 0.0%
OTHER 9 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 17 15.3% 3 17.6% 16 49.8 68.3
TITLE WORD 28 25.2% 9 32.1% 2 9.8 17.4
EXACT TITLE 2 1.8% 0 0.0% 1 1.0 0.0
JOURNAL 2 1.8% 1 50.0% 75 75.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 28 25.2% 16 57.1% 14 279.6 471.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 15 13.5% 4 26.7% 8 15.7 13.5
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 18 16.2% 3 16.7% 65 116.1 228.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.9% 0 0.0% 9 9.0 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
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 20 22.7% 4 20.0% 50 108.9 223.0
Single 68 77.3% 27 39.7% 8 67.0 243.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 46.5%
LONG 0.6%
FIELDS 2.5%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 47.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.1%
Ten most frequent errors:
1. First word of command is invalid 40.7%
2. NS command - no next screen 22.7%
3. FIND command with invalid index name 11.1%
4. PS command - no previous screen 4.6%
5. Valid command at an inappropriate time 2.9%
6. 790 2.7%
7. DISPLAY command contains invalid word 2.2%
8. Search term missing from search command 1.8%
9. Command contains escape or arrow key 1.0%
10. 1281 0.9%
11. All others 9.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.4%
2. LOCATE (ARTICLE DBS) 22.2%
3. MAGS DATABASE 7.1%
4. COMMANDS 7.1%
5. FIND 5.6%
6. INDEXES 5.6%
7. DISPLAYS (IAC DBS) 5.6%
8. Unrecognized term 3.2%
9. MAIL 1.6%
10. ADDON SEARCH 1.6%
11. All others 11.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 31.5%
2. First word of command is invalid 21.9%
3. DISPLAY command-complete in one screen 9.2%
4. FIND command with invalid index name 5.8%
5. FIND command with zero results 5.5%
6. DISPLAY command - middle of >1 screen 4.8%
7. PS command - no previous screen 3.1%
8. DISPLAY command-first of >1 screen 3.1%
9. DISPLAY command - last of >1 screen 3.1%
10. NS command - no next screen 2.1%
11. All others 9.9%
Ten most frequent SHOW requests:
1. IAC NEWS 46.7%
2. SEARCH 26.7%
3. SETTINGS (IAC DBS) 6.7%
4. SYSTEM NEWS 6.7%
5. MAIL SETTINGS 6.7%
6. SYSTEMS INFORMATION 6.7%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)