MELVYL IAC DATABASES TELNET STATISTICS
Time period: 11/24/01 through 11/30/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 128 247 375
Davis 157 3 160
Irvine 65 0 65
Los Angeles 1 52 53
Riverside 22 12 34
San Diego 27 40 67
San Francisco 31 0 31
Santa Barbara 6 20 26
Santa Cruz 20 25 45
LBL 0 2 2
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 0 56 56
Stanford 3
Other-Network UC n/a 114 114
_______ ______ _____
457 574 1,034
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 15 55 1,261
2-4 a.m. 3 35 1,064
4-6 a.m. 6 17 487
6-8 a.m. 23 52 992
8-10 a.m. 87 186 2,998
10-12 a.m. 178 436 5,550
12-2 p.m. 173 436 6,251
2-4 p.m. 213 483 6,011
4-6 p.m. 154 377 3,777
6-8 p.m. 72 169 2,244
8-10 p.m. 73 185 3,189
10-12 p.m. 37 117 1,364
__________ __________ __________ _________________
Total: 1,034 2,548 35,188
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 292 611 903
Davis 405 17 422
Irvine 147 0 147
Los Angeles 3 106 109
Riverside 76 28 104
San Diego 29 81 110
San Francisco 85 0 85
Santa Barbara 15 40 55
Santa Cruz 46 59 105
LBL 0 5 5
LLL 0 12 12
Los Alamos n/a 0 0
Other - UC 0 146 146
Stanford 17
Other-Network UC n/a 328 328
_______ ______ _____
1,098 1,433 2,548
Number of FIND commands by database
MAGS database 2,304
NEWS database 195
COMP database 49
Total number of FIND commands 2,548
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,506 9,711 14,217
Davis 4,249 156 4,405
Irvine 1,154 0 1,154
Los Angeles 77 2,097 2,174
Riverside 1,100 431 1,531
San Diego 77 2,324 2,401
San Francisco 1,089 0 1,089
Santa Barbara 25 423 448
Santa Cruz 227 540 767
LBL 0 191 191
LLL 0 248 248
Los Alamos n/a 0 0
Other - UC 0 1,459 1,459
Stanford 27
Other-Network UC n/a 4,986 4,986
_______ ______ _____
12,504 22,566 35,097
Number of Records Displayed by database:
MAGS database 31,898
NEWS database 2,872
COMP database 418
Total number of Records Displayed 35,097
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.4%
Percent of NEWS sessions 10.3%
Percent of COMP sessions 2.3%
Percent of searches done in the MAGS database 90.4%
Percent of searches done in the NEWS database 7.7%
Percent of searches done in the COMP database 1.9%
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 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) 4:57
Average session length (minutes:seconds) 12:33
Longest session recorded (minutes:seconds) 407:51
Average number of searches completed per session 2.5
Retrievals per search - median 6.0
Retrievals per search - average 503.5
Retrievals per search - standard deviation 4537.7
Percent of searches completed with 0 results 27.9%
Percent of searches entered that are long 1.2%
Percent of long searches completed
(includes partial results) 71.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,109 25.6%
DISPLAY (excluding automatic displays) 3,258 39.6%
HELP 256 3.1%
EXPLAIN 193 2.3%
SET/RESET 348 4.2%
SHOW 60 0.7%
ADD ON (AND, OR, AND NOT) 195 2.4%
LOGON or LOGOFF 1,205 14.6%
COMMENT 0 0.0%
SAVE 176 2.1%
USE 1 0.0%
OTHER 436 5.3%
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 470 21.5% 118 25.1% 11 55.7 138.8
TITLE WORD 520 23.8% 151 29.0% 15 200.4 639.9
EXACT TITLE 51 2.3% 24 47.1% 9 163.1 628.5
JOURNAL 102 4.7% 46 45.1% 1,234 9340.8 25110.3
EXACT JOURNAL 68 3.1% 32 47.1% 717 3522.4 5741.7
SUBJECT 406 18.5% 146 36.0% 35 278.6 603.9
EXACT SUBJECT 45 2.1% 3 6.7% 98 1338.7 2514.8
KEYWORD 406 18.5% 74 18.2% 21 539.5 2230.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.2% 1 25.0% 16 35.0 38.2
DATE 22 1.0% 2 9.1% 21 202.9 613.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 48 2.2% 10 20.8% 12 1813.3 10391.3
EXACT PE 41 1.9% 10 24.4% 2 20.5 38.8
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 6 0.3% 2 33.3% 6,908 6860.8 7627.5
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 89 4.2% 27 30.3% 14 521.3 2409.0
Single 2,010 95.8% 565 28.1% 20 755.8 5672.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 61.5%
LONG 1.7%
FIELDS 2.2%
PERIODICALS 1.9%
COMMENTS 0.0%
Other 29.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:01
Average session length (minutes:seconds) 13:25
Longest session recorded (minutes:seconds) 94:45
Average number of searches completed per session 2.0
Retrievals per search - median 4.0
Retrievals per search - average 203.1
Retrievals per search - standard deviation 678.0
Percent of searches completed with 0 results 32.7%
Percent of searches entered that are long 4.1%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 44 22.1%
DISPLAY (excluding automatic displays) 81 40.7%
HELP 1 0.5%
EXPLAIN 2 1.0%
SET/RESET 11 5.5%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 5 2.5%
LOGON or LOGOFF 30 15.1%
COMMENT 0 0.0%
SAVE 9 4.5%
USE 0 0.0%
OTHER 16 8.0%
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 20.8% 5 50.0% 4 8.4 9.3
TITLE WORD 14 29.2% 6 42.9% 50 84.9 89.5
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 4.2% 2 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 1 2.1% 0 0.0% 3 3.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 19 39.6% 1 5.3% 65 537.4 1053.6
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 2.1% 0 0.0% 9 9.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 2.1% 1 100% 0 0.0 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 9.1% 0 0.0% 189 144.0 90.0
Single 40 90.9% 15 37.5% 16 370.2 925.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.9%
SHORT 65.8%
LONG 1.8%
FIELDS 1.8%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 29.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 604
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 72
displays or when any of these paging options is set.
TEXT included with MAIL commands 91
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:41
Average session length (minutes:seconds) 8:47
Longest session recorded (minutes:seconds) 51:00
Average number of searches completed per session 1.8
Retrievals per search - median 6.0
Retrievals per search - average 12556
Retrievals per search - standard deviation 97212
Percent of searches completed with 0 results 31.9%
Percent of searches entered that are long 2.6%
Percent of long searches completed
(includes partial results) 40.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 174 29.5%
DISPLAY (excluding automatic displays) 130 22.0%
HELP 26 4.4%
EXPLAIN 22 3.7%
SET/RESET 55 9.3%
SHOW 13 2.2%
ADD ON (AND, OR, AND NOT) 21 3.6%
LOGON or LOGOFF 114 19.3%
COMMENT 0 0.0%
SAVE 4 0.7%
USE 0 0.0%
OTHER 31 5.3%
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 7.9% 9 60.0% 31 647.7 1302.5
TITLE WORD 65 34.2% 24 36.9% 29 431.5 1120.9
EXACT TITLE 2 1.1% 1 50.0% 3 3.0 0.0
JOURNAL 12 6.3% 1 8.3% 229 209191 366544
EXACT JOURNAL 2 1.1% 0 0.0% 172 172.0 7.1
SUBJECT 38 20.0% 13 34.2% 26 427.6 1523.0
EXACT SUBJECT 4 2.1% 1 25.0% 177 268.0 171.7
KEYWORD 44 23.2% 9 20.5% 16 1761.4 3740.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 1.1% 1 50.0% 2 2.0 0.0
DATE 2 1.1% 0 0.0% 91 91.0 107.5
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 1.1% 0 0.0% 40 39.5 53.0
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 1.1% 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 18 10.5% 5 27.8% 48 123.2 137.9
Single 154 89.5% 49 31.8% 26 22795.8 130497
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.2%
SHORT 32.6%
LONG 5.3%
FIELDS 3.9%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 46.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.5%
Ten most frequent errors:
1. First word of command is invalid 37.0%
2. NS command - no next screen 21.8%
3. FIND command with invalid index name 13.0%
4. PS command - no previous screen 5.0%
5. DISPLAY command contains invalid word 3.4%
6. Valid command at an inappropriate time 3.0%
7. Search term missing from search command 2.5%
8. Max. # of ports to a Z39 db are in use 1.9%
9. DISPLAY command-record numbers too large 1.4%
10. MAIL command issued w/o email address 1.1%
11. All others 9.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 28.6%
2. LOCATE (ARTICLE DBS) 16.6%
3. MAGS DATABASE 7.4%
4. COMMANDS 7.4%
5. FIND 6.9%
6. Unrecognized term 6.5%
7. INDEXES 4.1%
8. DISPLAYS (IAC DBS) 3.7%
9. ADDON SEARCH 2.8%
10. PERIODICALS 1.8%
11. All others 14.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.0%
2. First word of command is invalid 20.2%
3. FIND command with invalid index name 9.0%
4. DISPLAY command-first of >1 screen 5.8%
5. DISPLAY command-complete in one screen 5.4%
6. FIND command with zero results 5.0%
7. DISPLAY command - middle of >1 screen 5.0%
8. FIND command retrieves >1 book 3.4%
9. NS command - no next screen 3.0%
10. PS command - no previous screen 1.2%
11. All others 13.0%
Ten most frequent SHOW requests:
1. SEARCH 28.8%
2. HISTORY 23.3%
3. IAC NEWS 20.5%
4. SYSTEM NEWS 12.3%
5. MAIL SETTINGS 4.1%
6. MAIL STATUS 4.1%
7. GLOSSARY 2.7%
8. SYSTEM1 NEWS 2.7%
9. DATABASES 1.4%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)