MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/01/02 through 02/28/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 447 884 1,331
Davis 495 6 501
Irvine 234 0 234
Los Angeles 7 205 212
Riverside 38 25 63
San Diego 112 120 232
San Francisco 68 0 68
Santa Barbara 56 87 143
Santa Cruz 43 156 199
LBL 0 20 20
LLL 0 9 9
Los Alamos n/a 2 2
Other - UC 5 158 163
Stanford 17
Other-Network UC n/a 315 315
_______ ______ _____
1,505 1,987 3,509
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 57 191 3,073
2-4 a.m. 26 56 913
4-6 a.m. 21 61 906
6-8 a.m. 41 96 1,307
8-10 a.m. 321 665 6,785
10-12 a.m. 609 1,418 21,724
12-2 p.m. 631 1,523 19,597
2-4 p.m. 822 2,122 23,026
4-6 p.m. 478 1,267 14,107
6-8 p.m. 204 543 8,469
8-10 p.m. 167 436 4,968
10-12 p.m. 132 411 10,501
__________ __________ __________ _________________
Total: 3,509 8,789 115,376
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,187 2,199 3,386
Davis 1,184 9 1,193
Irvine 544 0 544
Los Angeles 11 513 524
Riverside 92 77 169
San Diego 211 269 480
San Francisco 169 0 169
Santa Barbara 121 209 330
Santa Cruz 89 354 443
LBL 0 49 49
LLL 0 20 20
Los Alamos n/a 3 3
Other - UC 9 454 463
Stanford 81
Other-Network UC n/a 935 935
_______ ______ _____
3,617 5,091 8,789
Number of FIND commands by database
MAGS database 7,977
NEWS database 549
COMP database 263
Total number of FIND commands 8,789
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 15,552 27,515 43,067
Davis 12,571 148 12,719
Irvine 3,954 0 3,954
Los Angeles 51 5,333 5,384
Riverside 871 1,166 2,037
San Diego 1,548 3,308 4,856
San Francisco 2,238 0 2,238
Santa Barbara 825 13,174 13,999
Santa Cruz 565 5,362 5,927
LBL 0 692 692
LLL 0 510 510
Los Alamos n/a 31 31
Other - UC 51 5,721 5,772
Stanford 316
Other-Network UC n/a 11,395 11,395
_______ ______ _____
38,226 74,355 112,897
Number of Records Displayed by database:
MAGS database 108,273
NEWS database 3,362
COMP database 3,741
Total number of Records Displayed 112,897
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.1%
Percent of NEWS sessions 8.2%
Percent of COMP sessions 3.6%
Percent of searches done in the MAGS database 90.8%
Percent of searches done in the NEWS database 6.2%
Percent of searches done in the COMP database 3.0%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.5
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) 5:20
Average session length (minutes:seconds) 11:23
Longest session recorded (minutes:seconds) 332:29
Average number of searches completed per session 2.6
Retrievals per search - median 5.0
Retrievals per search - average 675.8
Retrievals per search - standard deviation 9313.1
Percent of searches completed with 0 results 29.3%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 60.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,523 27.8%
DISPLAY (excluding automatic displays) 10,284 38.0%
HELP 832 3.1%
EXPLAIN 582 2.1%
SET/RESET 1,169 4.3%
SHOW 152 0.6%
ADD ON (AND, OR, AND NOT) 454 1.7%
LOGON or LOGOFF 4,077 15.0%
COMMENT 0 0.0%
SAVE 474 1.7%
USE 0 0.0%
OTHER 1,546 5.7%
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 1,572 20.1% 420 26.7% 12 79.6 474.9
TITLE WORD 1,962 25.1% 577 29.4% 14 932.1 14478.4
EXACT TITLE 244 3.1% 88 36.1% 2 47.1 315.4
JOURNAL 368 4.7% 157 42.7% 895 5887.8 12605.7
EXACT JOURNAL 199 2.5% 105 52.8% 1,062 6128.9 11577.5
SUBJECT 1,485 19.0% 563 37.9% 24 377.3 2909.9
EXACT SUBJECT 182 2.3% 27 14.8% 13 38.4 92.0
KEYWORD 1,401 17.9% 300 21.4% 23 1371.5 16993.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 22 0.3% 4 18.2% 16 116.6 176.6
DATE 98 1.3% 21 21.4% 23 118.1 264.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 174 2.2% 27 15.5% 8 316.8 1980.0
EXACT PE 70 0.9% 8 11.4% 3 79.5 457.9
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 52 0.7% 12 23.1% 24 1689.1 4050.7
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 341 4.6% 107 31.4% 11 374.7 1925.0
Single 7,133 95.4% 2,089 29.3% 18 996.5 11530.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 59.7%
LONG 2.2%
FIELDS 1.3%
PERIODICALS 2.1%
COMMENTS 0.0%
Other 31.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:13
Average session length (minutes:seconds) 8:01
Longest session recorded (minutes:seconds) 138:27
Average number of searches completed per session 2.0
Retrievals per search - median 9.5
Retrievals per search - average 261.9
Retrievals per search - standard deviation 1065.0
Percent of searches completed with 0 results 27.7%
Percent of searches entered that are long 2.3%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 234 22.5%
DISPLAY (excluding automatic displays) 412 39.6%
HELP 31 3.0%
EXPLAIN 37 3.6%
SET/RESET 52 5.0%
SHOW 5 0.5%
ADD ON (AND, OR, AND NOT) 29 2.8%
LOGON or LOGOFF 167 16.1%
COMMENT 0 0.0%
SAVE 24 2.3%
USE 0 0.0%
OTHER 49 4.7%
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 33 13.0% 19 57.6% 3 9.6 14.5
TITLE WORD 57 22.5% 16 28.1% 43 657.3 2109.1
EXACT TITLE 3 1.2% 1 33.3% 3 2.5 2.1
JOURNAL 13 5.1% 7 53.8% 151 347.5 562.1
EXACT JOURNAL 3 1.2% 1 33.3% 2,583 2583.0 0.0
SUBJECT 45 17.8% 14 31.1% 39 141.5 213.7
EXACT SUBJECT 6 2.4% 1 16.7% 941 575.6 500.6
KEYWORD 68 26.9% 10 14.7% 61 436.5 1215.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 2.8% 2 28.6% 122 121.0 100.7
DATE 10 4.0% 2 20.0% 80 82.3 49.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 7 2.8% 2 28.6% 8 14.0 12.7
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 1 0.4% 0 0.0% 1 1.0 0.0
By number of indexes:
Multiple 21 9.1% 6 28.6% 64 89.2 70.0
Single 210 90.9% 62 29.5% 31 443.1 1385.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 64.9%
LONG 1.7%
FIELDS 2.5%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 27.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 2,188
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 79
displays or when any of these paging options is set.
TEXT included with MAIL commands 470
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
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Median session length (minutes:seconds) 4:13
Average session length (minutes:seconds) 10:28
Longest session recorded (minutes:seconds) 183:30
Average number of searches completed per session 1.9
Retrievals per search - median 3.0
Retrievals per search - average 3456.7
Retrievals per search - standard deviation 41389
Percent of searches completed with 0 results 34.2%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 33.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 515 32.4%
DISPLAY (excluding automatic displays) 340 21.4%
HELP 64 4.0%
EXPLAIN 80 5.0%
SET/RESET 129 8.1%
SHOW 10 0.6%
ADD ON (AND, OR, AND NOT) 34 2.1%
LOGON or LOGOFF 341 21.5%
COMMENT 0 0.0%
SAVE 2 0.1%
USE 1 0.1%
OTHER 73 4.6%
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 52 9.3% 8 15.4% 10 161.0 370.2
TITLE WORD 146 26.1% 41 28.1% 12 142.4 479.6
EXACT TITLE 33 5.9% 11 33.3% 1 39.1 95.8
JOURNAL 22 3.9% 14 63.6% 22,947 214231 284210
EXACT JOURNAL 7 1.2% 6 85.7% 389 389.0 0.0
SUBJECT 138 24.6% 66 47.8% 23 367.0 843.1
EXACT SUBJECT 6 1.1% 5 83.3% 1 1.0 0.0
KEYWORD 110 19.6% 32 29.1% 13 697.6 2544.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 9 1.6% 8 88.9% 1 1.0 0.0
DATE 27 4.8% 5 18.5% 10 98.3 251.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 8 1.4% 1 12.5% 4 5.3 4.8
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 2 0.4% 0 0.0% 6 6.0 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 46 9.0% 18 39.1% 11 93.8 231.1
Single 465 91.0% 161 34.6% 14 5970.0 55173.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
SHORT 45.1%
LONG 1.9%
FIELDS 2.7%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 46.5%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.9%
Ten most frequent errors:
1. First word of command is invalid 35.5%
2. NS command - no next screen 24.4%
3. FIND command with invalid index name 15.7%
4. PS command - no previous screen 4.2%
5. DISPLAY command contains invalid word 3.0%
6. Search term missing from search command 2.4%
7. Valid command at an inappropriate time 2.2%
8. DISPLAY command - no FIND results 1.4%
9. MAIL command issued w/o email address 1.0%
10. DISPLAY command-record numbers too large 0.6%
11. All others 9.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 29.9%
2. LOCATE (ARTICLE DBS) 18.6%
3. FIND 9.9%
4. INDEXES 6.4%
5. COMMANDS 6.0%
6. MAGS DATABASE 5.6%
7. Unrecognized term 3.7%
8. ADDON SEARCH 2.6%
9. DISPLAYS (IAC DBS) 2.4%
10. ABI TEXT 1.4%
11. All others 13.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.5%
2. First word of command is invalid 20.1%
3. FIND command with invalid index name 12.4%
4. DISPLAY command - middle of >1 screen 5.6%
5. FIND command with zero results 5.0%
6. DISPLAY command-first of >1 screen 4.6%
7. DISPLAY command-complete in one screen 3.9%
8. NS command - no next screen 2.8%
9. FIND command retrieves >1 book 2.8%
10. PS command - no previous screen 2.1%
11. All others 12.3%
Ten most frequent SHOW requests:
1. SEARCH 30.1%
2. HISTORY 28.3%
3. IAC NEWS 16.9%
4. MAIL STATUS 13.3%
5. SETTINGS (IAC DBS) 5.4%
6. GLOSSARY 1.8%
7. SYSTEM NEWS 1.2%
8. UCSF PASSWORDS 0.6%
9. TIMEOUT SETTING 0.6%
10. MAIL SETTINGS 0.6%
11. All others 1.2%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)