MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/03/01 through 02/09/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 163 425 588
Davis 200 3 203
Irvine 183 0 183
Los Angeles 4 132 136
Riverside 68 22 90
San Diego 29 39 68
San Francisco 52 0 52
Santa Barbara 67 66 133
Santa Cruz 144 40 184
LBL 0 7 7
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 4 38 42
Stanford 55
Other-Network UC n/a 159 159
_______ ______ _____
914 934 1,903
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 24 74 425
2-4 a.m. 7 29 749
4-6 a.m. 5 9 320
6-8 a.m. 34 67 1,213
8-10 a.m. 167 512 6,006
10-12 a.m. 293 723 7,038
12-2 p.m. 374 1,002 9,138
2-4 p.m. 411 1,113 14,147
4-6 p.m. 283 755 9,605
6-8 p.m. 153 421 4,610
8-10 p.m. 107 288 4,249
10-12 p.m. 45 121 1,418
__________ __________ __________ _________________
Total: 1,903 5,114 58,918
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 544 1,082 1,626
Davis 543 15 558
Irvine 481 0 481
Los Angeles 7 326 333
Riverside 182 41 223
San Diego 87 116 203
San Francisco 149 0 149
Santa Barbara 159 152 311
Santa Cruz 347 62 409
LBL 0 19 19
LLL 0 16 16
Los Alamos n/a 0 0
Other - UC 6 125 131
Stanford 170
Other-Network UC n/a 485 485
_______ ______ _____
2,505 2,439 5,114
Number of FIND commands by database
MAGS database 4,447
NEWS database 557
COMP database 110
Total number of FIND commands 5,114
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 7,121 12,476 19,597
Davis 5,058 255 5,313
Irvine 5,210 0 5,210
Los Angeles 18 5,777 5,795
Riverside 1,367 344 1,711
San Diego 229 1,293 1,522
San Francisco 1,538 0 1,538
Santa Barbara 1,406 2,115 3,521
Santa Cruz 2,551 1,299 3,850
LBL 0 168 168
LLL 0 144 144
Los Alamos n/a 0 0
Other - UC 50 1,083 1,133
Stanford 323
Other-Network UC n/a 7,162 7,162
_______ ______ _____
24,548 32,116 56,987
Number of Records Displayed by database:
MAGS database 53,352
NEWS database 3,290
COMP database 2,276
Total number of Records Displayed 56,987
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.7%
Percent of NEWS sessions 10.1%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 87.0%
Percent of searches done in the NEWS database 10.9%
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 0.7
Standard deviation in seconds 2.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:24
Average session length (minutes:seconds) 10:53
Longest session recorded (minutes:seconds) 434:58
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 414.6
Retrievals per search - standard deviation 3197.1
Percent of searches completed with 0 results 31.0%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 28.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,207 28.7%
DISPLAY (excluding automatic displays) 5,420 37.0%
HELP 539 3.7%
EXPLAIN 350 2.4%
SET/RESET 589 4.0%
SHOW 64 0.4%
ADD ON (AND, OR, AND NOT) 240 1.6%
LOGON or LOGOFF 2,210 15.1%
COMMENT 0 0.0%
SAVE 216 1.5%
USE 5 0.0%
OTHER 822 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 948 21.8% 264 27.8% 10 62.7 268.3
TITLE WORD 850 19.5% 305 35.9% 10 426.2 2909.3
EXACT TITLE 126 2.9% 73 57.9% 4 23.5 46.9
JOURNAL 173 4.0% 80 46.2% 1,757 5014.9 8382.6
EXACT JOURNAL 136 3.1% 51 37.5% 617 3485.9 6558.4
SUBJECT 920 21.2% 357 38.8% 31 264.6 654.7
EXACT SUBJECT 60 1.4% 34 56.7% 10 332.8 847.8
KEYWORD 924 21.2% 158 17.1% 22 751.4 5890.9
SUBFILE 2 0.0% 0 0.0% 36 36.0 49.5
PUBLICATION TYPE 9 0.2% 0 0.0% 35 48.1 46.3
DATE 61 1.4% 22 36.1% 15 241.4 1103.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 49 1.1% 10 20.4% 5 60.5 165.8
EXACT PE 31 0.7% 3 9.7% 2 6.3 14.6
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 60 1.4% 18 30.0% 271 3049.5 5916.3
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 179 4.3% 67 37.4% 15 1097.8 3876.3
Single 3,971 95.7% 1,233 31.0% 17 607.9 3951.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 61.7%
LONG 1.4%
FIELDS 1.1%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 31.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:47
Average session length (minutes:seconds) 9:29
Longest session recorded (minutes:seconds) 63:54
Average number of searches completed per session 1.8
Retrievals per search - median 13.0
Retrievals per search - average 690.3
Retrievals per search - standard deviation 2704.8
Percent of searches completed with 0 results 28.7%
Percent of searches entered that are long 4.5%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 104 21.3%
DISPLAY (excluding automatic displays) 191 39.1%
HELP 15 3.1%
EXPLAIN 22 4.5%
SET/RESET 29 5.9%
SHOW 12 2.5%
ADD ON (AND, OR, AND NOT) 6 1.2%
LOGON or LOGOFF 67 13.7%
COMMENT 0 0.0%
SAVE 21 4.3%
USE 0 0.0%
OTHER 21 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 15 14.0% 7 46.7% 16 531.0 1142.8
TITLE WORD 25 23.4% 9 36.0% 8 171.4 543.4
EXACT TITLE 1 0.9% 0 0.0% 1 1.0 0.0
JOURNAL 3 2.8% 3 100% 0 0.0 0.0
EXACT JOURNAL 1 0.9% 0 0.0% 743 743.0 0.0
SUBJECT 23 21.5% 5 21.7% 163 890.1 1908.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 35 32.7% 8 22.9% 360 1868.6 4988.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.9% 1 100% 0 0.0 0.0
DATE 1 0.9% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.9% 1 50.0% 18 18.0 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 4 3.9% 4 100% 0 0.0 0.0
Single 98 96.1% 26 26.5% 58 1030.9 3266.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.5%
SHORT 64.7%
LONG 2.1%
FIELDS 0.3%
PERIODICALS 0.7%
COMMENTS 0.0%
Other 24.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,109
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 78
displays or when any of these paging options is set.
TEXT included with MAIL commands 237
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:40
Average session length (minutes:seconds) 11:49
Longest session recorded (minutes:seconds) 165:34
Average number of searches completed per session 2.9
Retrievals per search - median 1.0
Retrievals per search - average 2732.8
Retrievals per search - standard deviation 40952
Percent of searches completed with 0 results 39.7%
Percent of searches entered that are long 1.8%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 542 39.3%
DISPLAY (excluding automatic displays) 308 22.3%
HELP 42 3.0%
EXPLAIN 29 2.1%
SET/RESET 82 5.9%
SHOW 15 1.1%
ADD ON (AND, OR, AND NOT) 15 1.1%
LOGON or LOGOFF 259 18.8%
COMMENT 0 0.0%
SAVE 17 1.2%
USE 0 0.0%
OTHER 70 5.1%
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 19 3.4% 6 31.6% 26 95.4 185.0
TITLE WORD 205 36.7% 79 38.5% 5 924.0 6656.5
EXACT TITLE 9 1.6% 6 66.7% 1 3.7 4.6
JOURNAL 11 2.0% 5 45.5% 89 217054 357045
EXACT JOURNAL 4 0.7% 1 25.0% 2 256.7 442.0
SUBJECT 190 34.0% 92 48.4% 30 747.6 2619.0
EXACT SUBJECT 8 1.4% 1 12.5% 15 21.0 26.6
KEYWORD 100 17.9% 28 28.0% 16 85.6 262.0
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 10 1.8% 2 20.0% 7 129.6 263.6
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 0.4% 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
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 19 3.5% 5 26.3% 14 82.4 201.8
Single 517 96.5% 210 40.6% 10 4880.5 54806.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 45.9%
LONG 3.4%
FIELDS 1.6%
PERIODICALS 0.1%
COMMENTS 0.0%
Other 45.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.8%
Ten most frequent errors:
1. First word of command is invalid 38.2%
2. NS command - no next screen 24.5%
3. FIND command with invalid index name 13.3%
4. PS command - no previous screen 4.1%
5. DISPLAY command contains invalid word 3.1%
6. Valid command at an inappropriate time 2.3%
7. Search term missing from search command 2.3%
8. DISPLAY command - no FIND results 1.2%
9. DISPLAY command-record numbers too large 0.9%
10. Command contains escape or arrow key 0.6%
11. All others 9.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.9%
2. LOCATE (ARTICLE DBS) 17.2%
3. INDEXES 7.5%
4. MAGS DATABASE 7.2%
5. COMMANDS 7.0%
6. FIND 6.5%
7. Unrecognized term 5.2%
8. DISPLAYS (IAC DBS) 3.5%
9. MAIL 3.5%
10. A121 1.5%
11. All others 13.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.2%
2. First word of command is invalid 20.4%
3. FIND command with invalid index name 11.0%
4. FIND command with zero results 6.1%
5. DISPLAY command-first of >1 screen 5.1%
6. DISPLAY command-complete in one screen 4.5%
7. DISPLAY command - middle of >1 screen 4.5%
8. NS command - no next screen 3.6%
9. DISPLAY command - last of >1 screen 2.2%
10. FIND command retrieves >1 book 1.9%
11. All others 13.4%
Ten most frequent SHOW requests:
1. HISTORY 35.6%
2. SEARCH 32.2%
3. MAIL STATUS 11.5%
4. GLOSSARY 6.9%
5. SETTINGS (IAC DBS) 3.4%
6. SYSTEM NEWS 3.4%
7. MAIL SETTINGS 3.4%
8. IAC NEWS 2.3%
9. LIBRARY NEWS 1.1%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)