MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/03/01 through 03/09/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 172 418 590
Davis 294 2 296
Irvine 257 0 257
Los Angeles 13 171 184
Riverside 91 17 108
San Diego 40 75 115
San Francisco 73 0 73
Santa Barbara 83 72 155
Santa Cruz 115 80 195
LBL 0 19 19
LLL 0 1 1
Los Alamos n/a 1 1
Other - UC 9 66 75
Stanford 70
Other-Network UC n/a 135 135
_______ ______ _____
1,147 1,057 2,274
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 45 120 2,038
2-4 a.m. 17 30 574
4-6 a.m. 6 6 38
6-8 a.m. 35 78 673
8-10 a.m. 145 397 2,706
10-12 a.m. 315 1,074 9,310
12-2 p.m. 368 1,033 10,915
2-4 p.m. 524 1,417 15,677
4-6 p.m. 385 1,089 9,859
6-8 p.m. 211 736 6,422
8-10 p.m. 142 554 4,814
10-12 p.m. 81 381 5,952
__________ __________ __________ _________________
Total: 2,274 6,915 68,978
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 527 1,273 1,800
Davis 828 6 834
Irvine 908 0 908
Los Angeles 52 511 563
Riverside 365 39 404
San Diego 79 198 277
San Francisco 207 0 207
Santa Barbara 176 237 413
Santa Cruz 305 236 541
LBL 0 52 52
LLL 0 6 6
Los Alamos n/a 4 4
Other - UC 13 163 176
Stanford 242
Other-Network UC n/a 488 488
_______ ______ _____
3,460 3,213 6,915
Number of FIND commands by database
MAGS database 6,242
NEWS database 479
COMP database 194
Total number of FIND commands 6,915
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,248 12,333 16,581
Davis 7,430 20 7,450
Irvine 8,054 0 8,054
Los Angeles 451 6,539 6,990
Riverside 2,447 403 2,850
San Diego 1,086 1,246 2,332
San Francisco 4,158 0 4,158
Santa Barbara 1,230 1,599 2,829
Santa Cruz 3,233 2,304 5,537
LBL 0 526 526
LLL 0 178 178
Los Alamos n/a 10 10
Other - UC 25 2,573 2,598
Stanford 301
Other-Network UC n/a 6,916 6,916
_______ ______ _____
32,362 34,647 67,310
Number of Records Displayed by database:
MAGS database 63,564
NEWS database 3,657
COMP database 1,757
Total number of Records Displayed 67,310
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.6%
Percent of NEWS sessions 9.0%
Percent of COMP sessions 3.4%
Percent of searches done in the MAGS database 90.3%
Percent of searches done in the NEWS database 6.9%
Percent of searches done in the COMP database 2.8%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:33
Average session length (minutes:seconds) 12:14
Longest session recorded (minutes:seconds) 527:45
Average number of searches completed per session 3.1
Retrievals per search - median 4.0
Retrievals per search - average 427.3
Retrievals per search - standard deviation 3610.6
Percent of searches completed with 0 results 32.7%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 44.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 5,861 29.5%
DISPLAY (excluding automatic displays) 7,506 37.8%
HELP 624 3.1%
EXPLAIN 441 2.2%
SET/RESET 654 3.3%
SHOW 101 0.5%
ADD ON (AND, OR, AND NOT) 381 1.9%
LOGON or LOGOFF 2,806 14.1%
COMMENT 1 0.0%
SAVE 354 1.8%
USE 4 0.0%
OTHER 1,115 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 980 16.0% 302 30.8% 8 74.3 279.1
TITLE WORD 1,256 20.6% 397 31.6% 11 210.5 894.9
EXACT TITLE 158 2.6% 69 43.7% 7 32.3 76.4
JOURNAL 257 4.2% 142 55.3% 969 6690.2 14798.2
EXACT JOURNAL 94 1.5% 38 40.4% 835 5025.5 10212.4
SUBJECT 1,399 22.9% 655 46.8% 22 288.2 925.4
EXACT SUBJECT 40 0.7% 13 32.5% 54 154.8 244.0
KEYWORD 1,612 26.4% 361 22.4% 30 861.0 5759.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 18 0.3% 5 27.8% 5 19.3 28.2
DATE 75 1.2% 11 14.7% 4 93.1 600.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 129 2.1% 27 20.9% 7 79.0 300.5
EXACT PE 37 0.6% 7 18.9% 3 4.2 6.1
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 54 0.9% 9 16.7% 232 2180.4 4228.2
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 303 5.2% 90 29.7% 8 526.4 2141.0
Single 5,496 94.8% 1,852 33.7% 17 677.4 4639.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.0%
SHORT 62.3%
LONG 1.9%
FIELDS 0.6%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 31.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:19
Average session length (minutes:seconds) 12:31
Longest session recorded (minutes:seconds) 107:55
Average number of searches completed per session 2.5
Retrievals per search - median 7.0
Retrievals per search - average 205.9
Retrievals per search - standard deviation 655.5
Percent of searches completed with 0 results 28.9%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 176 26.9%
DISPLAY (excluding automatic displays) 241 36.9%
HELP 22 3.4%
EXPLAIN 20 3.1%
SET/RESET 30 4.6%
SHOW 3 0.5%
ADD ON (AND, OR, AND NOT) 18 2.8%
LOGON or LOGOFF 106 16.2%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 37 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 10 5.4% 7 70.0% 3 3.3 1.5
TITLE WORD 38 20.5% 4 10.5% 18 352.4 1135.0
EXACT TITLE 1 0.5% 0 0.0% 5 5.0 0.0
JOURNAL 10 5.4% 6 60.0% 126 125.3 141.7
EXACT JOURNAL 3 1.6% 3 100% 0 0.0 0.0
SUBJECT 23 12.4% 12 52.2% 123 359.3 467.9
EXACT SUBJECT 5 2.7% 3 60.0% 1,478 1478.0 2042.1
KEYWORD 84 45.4% 17 20.2% 45 246.6 567.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.5% 0 0.0% 2,514 2514.0 0.0
DATE 7 3.8% 0 0.0% 20 21.1 15.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.5% 0 0.0% 369 369.0 0.0
EXACT PE 1 0.5% 0 0.0% 1 1.0 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 0.5% 0 0.0% 9 9.0 0.0
By number of indexes:
Multiple 8 4.5% 1 12.5% 20 21.1 15.0
Single 168 95.5% 50 29.8% 50 327.7 816.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.4%
SHORT 60.0%
LONG 1.7%
FIELDS 0.7%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 32.6%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,468
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 49
displays or when any of these paging options is set.
TEXT included with MAIL commands 370
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:57
Average session length (minutes:seconds) 7:06
Longest session recorded (minutes:seconds) 39:35
Average number of searches completed per session 2.3
Retrievals per search - median 3.0
Retrievals per search - average 329.0
Retrievals per search - standard deviation 2046.1
Percent of searches completed with 0 results 39.7%
Percent of searches entered that are long 2.3%
Percent of long searches completed
(includes partial results) 54.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 440 32.4%
DISPLAY (excluding automatic displays) 320 23.5%
HELP 67 4.9%
EXPLAIN 52 3.8%
SET/RESET 63 4.6%
SHOW 4 0.3%
ADD ON (AND, OR, AND NOT) 39 2.9%
LOGON or LOGOFF 300 22.1%
COMMENT 0 0.0%
SAVE 8 0.6%
USE 0 0.0%
OTHER 66 4.9%
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 49 10.9% 21 42.9% 251 609.3 738.5
TITLE WORD 97 21.6% 40 41.2% 21 600.4 2038.6
EXACT TITLE 13 2.9% 10 76.9% 64 393.3 582.6
JOURNAL 11 2.5% 10 90.9% 2 2.0 0.0
EXACT JOURNAL 3 0.7% 3 100% 0 0.0 0.0
SUBJECT 143 31.9% 67 46.9% 30 1023.1 4633.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 124 27.7% 18 14.5% 12 214.8 580.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.2% 1 100% 0 0.0 0.0
DATE 6 1.3% 2 33.3% 279 273.8 302.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.2% 0 0.0% 33 33.0 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 15 3.5% 10 66.7% 2 5.6 9.2
Single 418 96.5% 152 36.4% 27 579.2 2692.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.8%
SHORT 45.3%
LONG 5.3%
FIELDS 0.9%
PERIODICALS 0.2%
COMMENTS 0.0%
Other 41.6%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.4%
Ten most frequent errors:
1. First word of command is invalid 36.8%
2. NS command - no next screen 26.7%
3. FIND command with invalid index name 13.2%
4. PS command - no previous screen 4.1%
5. DISPLAY command contains invalid word 2.6%
6. Valid command at an inappropriate time 2.2%
7. Search term missing from search command 2.2%
8. DISPLAY command - no FIND results 1.0%
9. MAIL command issued w/o email address 0.9%
10. 1243 0.8%
11. All others 9.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.3%
2. LOCATE (ARTICLE DBS) 15.8%
3. FIND 10.3%
4. COMMANDS 6.8%
5. INDEXES 5.8%
6. MAGS DATABASE 5.5%
7. DISPLAYS (IAC DBS) 3.9%
8. Unrecognized term 3.7%
9. ADDON SEARCH 2.3%
10. DATABASES 1.8%
11. All others 16.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.3%
2. First word of command is invalid 17.9%
3. FIND command with invalid index name 12.4%
4. FIND command with zero results 6.3%
5. DISPLAY command-complete in one screen 5.2%
6. DISPLAY command-first of >1 screen 4.7%
7. DISPLAY command - middle of >1 screen 4.2%
8. NS command - no next screen 3.8%
9. FIND command retrieves >1 book 3.6%
10. DISPLAY command - last of >1 screen 1.9%
11. All others 13.8%
Ten most frequent SHOW requests:
1. SEARCH 41.1%
2. HISTORY 37.4%
3. SETTINGS (IAC DBS) 3.7%
4. GLOSSARY 3.7%
5. MAIL STATUS 3.7%
6. SYSTEM NEWS 2.8%
7. IAC NEWS 1.9%
8. LIBRARY NEWS 1.9%
9. MAIL SETTINGS 1.9%
10. 0405 0.9%
11. All others 0.9%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)