MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/01/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 645 1,215 1,860
Davis 745 4 749
Irvine 383 0 383
Los Angeles 3 249 252
Riverside 93 67 160
San Diego 54 159 213
San Francisco 118 0 118
Santa Barbara 56 75 131
Santa Cruz 79 79 158
LBL 0 41 41
LLL 0 7 7
Los Alamos n/a 1 1
Other - UC 14 234 248
Stanford 18
Other-Network UC n/a 412 412
_______ ______ _____
2,190 2,543 4,751
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 80 229 3,345
2-4 a.m. 28 96 1,883
4-6 a.m. 21 65 1,142
6-8 a.m. 78 224 3,268
8-10 a.m. 368 895 10,304
10-12 a.m. 764 2,229 25,103
12-2 p.m. 949 2,422 28,178
2-4 p.m. 1,037 2,543 30,097
4-6 p.m. 698 1,995 18,932
6-8 p.m. 297 906 9,452
8-10 p.m. 279 737 10,406
10-12 p.m. 152 422 4,533
__________ __________ __________ _________________
Total: 4,751 12,763 146,643
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,802 3,185 4,987
Davis 1,796 22 1,818
Irvine 1,133 0 1,133
Los Angeles 4 562 566
Riverside 283 246 529
San Diego 119 427 546
San Francisco 307 0 307
Santa Barbara 135 215 350
Santa Cruz 355 196 551
LBL 0 147 147
LLL 0 28 28
Los Alamos n/a 1 1
Other - UC 33 618 651
Stanford 55
Other-Network UC n/a 1,094 1,094
_______ ______ _____
5,967 6,741 12,763
Number of FIND commands by database
MAGS database 11,439
NEWS database 907
COMP database 417
Total number of FIND commands 12,763
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 23,913 38,672 62,585
Davis 17,265 157 17,422
Irvine 8,968 0 8,968
Los Angeles 77 7,520 7,597
Riverside 2,515 2,368 4,883
San Diego 755 7,021 7,776
San Francisco 4,557 0 4,557
Santa Barbara 882 2,247 3,129
Santa Cruz 1,627 1,928 3,555
LBL 0 2,752 2,752
LLL 0 433 433
Los Alamos n/a 3 3
Other - UC 346 5,687 6,033
Stanford 67
Other-Network UC n/a 16,606 16,606
_______ ______ _____
60,905 85,394 146,366
Number of Records Displayed by database:
MAGS database 131,797
NEWS database 12,151
COMP database 2,695
Total number of Records Displayed 146,366
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.8%
Percent of NEWS sessions 9.2%
Percent of COMP sessions 4.0%
Percent of searches done in the MAGS database 89.6%
Percent of searches done in the NEWS database 7.1%
Percent of searches done in the COMP database 3.3%
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 2.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:39
Average session length (minutes:seconds) 12:22
Longest session recorded (minutes:seconds) 501:07
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 557.3
Retrievals per search - standard deviation 5367.0
Percent of searches completed with 0 results 30.3%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 57.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 10,625 28.2%
DISPLAY (excluding automatic displays) 14,043 37.3%
HELP 1,330 3.5%
EXPLAIN 950 2.5%
SET/RESET 1,536 4.1%
SHOW 231 0.6%
ADD ON (AND, OR, AND NOT) 814 2.2%
LOGON or LOGOFF 5,562 14.8%
COMMENT 0 0.0%
SAVE 616 1.6%
USE 8 0.0%
OTHER 1,948 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 2,187 19.8% 603 27.6% 10 70.8 282.6
TITLE WORD 2,479 22.4% 728 29.4% 12 289.5 1985.4
EXACT TITLE 408 3.7% 227 55.6% 4 73.5 375.1
JOURNAL 560 5.1% 257 45.9% 957 5907.9 20470.8
EXACT JOURNAL 275 2.5% 141 51.3% 1,491 5956.0 9450.9
SUBJECT 2,431 22.0% 916 37.7% 33 303.2 2040.0
EXACT SUBJECT 117 1.1% 30 25.6% 102 745.2 1842.6
KEYWORD 1,967 17.8% 368 18.7% 27 1397.7 9607.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 23 0.2% 4 17.4% 42 3164.3 7644.7
DATE 154 1.4% 29 18.8% 23 174.7 432.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 232 2.1% 45 19.4% 9 743.3 5549.0
EXACT PE 152 1.4% 22 14.5% 3 24.9 91.1
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 69 0.6% 21 30.4% 146 965.5 2801.1
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 482 4.6% 147 30.5% 13 378.7 2204.0
Single 10,060 95.4% 3,086 30.7% 19 859.6 6746.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 60.4%
LONG 1.9%
FIELDS 1.5%
PERIODICALS 2.0%
COMMENTS 0.0%
Other 32.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:00
Average session length (minutes:seconds) 9:59
Longest session recorded (minutes:seconds) 94:45
Average number of searches completed per session 2.2
Retrievals per search - median 2.0
Retrievals per search - average 367.7
Retrievals per search - standard deviation 3533.8
Percent of searches completed with 0 results 39.9%
Percent of searches entered that are long 3.6%
Percent of long searches completed
(includes partial results) 93.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 380 28.4%
DISPLAY (excluding automatic displays) 455 34.1%
HELP 32 2.4%
EXPLAIN 38 2.8%
SET/RESET 91 6.8%
SHOW 5 0.4%
ADD ON (AND, OR, AND NOT) 37 2.8%
LOGON or LOGOFF 213 15.9%
COMMENT 0 0.0%
SAVE 15 1.1%
USE 0 0.0%
OTHER 70 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 138 34.2% 82 59.4% 2 24.5 104.7
TITLE WORD 91 22.5% 36 39.6% 22 188.9 511.6
EXACT TITLE 2 0.5% 2 100% 0 0.0 0.0
JOURNAL 14 3.5% 10 71.4% 78 397.3 690.1
EXACT JOURNAL 3 0.7% 2 66.7% 3,450 3450.0 0.0
SUBJECT 29 7.2% 14 48.3% 9 365.9 913.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 101 25.0% 13 12.9% 30 844.1 4980.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.5% 0 0.0% 14 14.0 0.0
DATE 8 2.0% 1 12.5% 14 15.0 10.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 2.0% 3 37.5% 5 4.0 2.3
EXACT PE 8 2.0% 0 0.0% 5 11.1 14.0
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 23 6.1% 5 21.7% 14 186.8 589.8
Single 356 93.9% 153 43.0% 14 443.6 3309.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 58.3%
LONG 1.2%
FIELDS 2.3%
PERIODICALS 2.4%
COMMENTS 0.0%
Other 32.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,747
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 206
displays or when any of these paging options is set.
TEXT included with MAIL commands 519
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 3:29
Average session length (minutes:seconds) 7:45
Longest session recorded (minutes:seconds) 99:22
Average number of searches completed per session 2.0
Retrievals per search - median 2.0
Retrievals per search - average 5498.2
Retrievals per search - standard deviation 69949
Percent of searches completed with 0 results 39.5%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 53.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 848 31.8%
DISPLAY (excluding automatic displays) 647 24.3%
HELP 142 5.3%
EXPLAIN 84 3.1%
SET/RESET 189 7.1%
SHOW 30 1.1%
ADD ON (AND, OR, AND NOT) 59 2.2%
LOGON or LOGOFF 546 20.5%
COMMENT 0 0.0%
SAVE 17 0.6%
USE 0 0.0%
OTHER 105 3.9%
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 81 9.0% 43 53.1% 15 308.7 671.8
TITLE WORD 267 29.8% 105 39.3% 16 413.2 2465.0
EXACT TITLE 20 2.2% 12 60.0% 2 2.1 1.4
JOURNAL 22 2.5% 7 31.8% 229 300381 463920
EXACT JOURNAL 12 1.3% 9 75.0% 167 115.0 98.9
SUBJECT 254 28.3% 113 44.5% 29 333.9 941.2
EXACT SUBJECT 15 1.7% 8 53.3% 161 1084.1 2466.1
KEYWORD 177 19.8% 45 25.4% 27 1998.1 13282.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.3% 1 33.3% 2 2.0 0.0
DATE 32 3.6% 2 6.3% 244 258.0 250.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 0.9% 1 12.5% 28 29.6 25.1
EXACT PE 3 0.3% 0 0.0% 4 27.7 42.7
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 2 0.2% 0 0.0% 167 167.0 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 53 6.3% 11 20.8% 51 154.1 182.5
Single 787 93.7% 324 41.2% 22 10580.1 96917.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.4%
SHORT 43.5%
LONG 4.3%
FIELDS 2.9%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 42.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.9%
Ten most frequent errors:
1. First word of command is invalid 37.9%
2. NS command - no next screen 21.8%
3. FIND command with invalid index name 14.4%
4. PS command - no previous screen 4.9%
5. DISPLAY command contains invalid word 2.8%
6. Valid command at an inappropriate time 2.7%
7. Search term missing from search command 2.7%
8. NS of SHOW/EXP command-no next screen 1.3%
9. DISPLAY command - no FIND results 1.0%
10. DISPLAY command-record numbers too large 0.9%
11. All others 9.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 24.5%
2. LOCATE (ARTICLE DBS) 24.1%
3. FIND 8.3%
4. COMMANDS 6.3%
5. MAGS DATABASE 6.0%
6. INDEXES 5.7%
7. Unrecognized term 4.2%
8. DISPLAYS (IAC DBS) 2.5%
9. ADDON SEARCH 2.3%
10. MAIL 1.6%
11. All others 14.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.3%
2. First word of command is invalid 20.9%
3. FIND command with invalid index name 11.3%
4. DISPLAY command-complete in one screen 5.4%
5. DISPLAY command-first of >1 screen 5.2%
6. FIND command with zero results 5.1%
7. DISPLAY command - middle of >1 screen 4.5%
8. FIND command retrieves >1 book 2.6%
9. NS command - no next screen 2.4%
10. PS command - no previous screen 2.0%
11. All others 15.2%
Ten most frequent SHOW requests:
1. HISTORY 31.3%
2. SEARCH 29.8%
3. IAC NEWS 18.1%
4. SYSTEM NEWS 4.9%
5. MAIL SETTINGS 3.4%
6. MAIL STATUS 2.6%
7. GLOSSARY 1.9%
8. SETTINGS (IAC DBS) 1.5%
9. SYSTEM1 NEWS 0.8%
10. LIBRARY NEWS 0.8%
11. All others 4.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)