MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/01/01 through 09/07/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 66 203 269
Davis 75 0 75
Irvine 34 0 34
Los Angeles 0 54 54
Riverside 6 4 10
San Diego 20 14 34
San Francisco 15 0 15
Santa Barbara 5 17 22
Santa Cruz 16 4 20
LBL 0 4 4
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 5 16 21
Stanford 1
Other-Network UC n/a 46 46
_______ ______ _____
242 363 606
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 17 55 1,146
2-4 a.m. 4 16 288
4-6 a.m. 2 1 4
6-8 a.m. 22 75 1,320
8-10 a.m. 67 144 2,119
10-12 a.m. 109 339 3,438
12-2 p.m. 96 210 2,026
2-4 p.m. 129 296 3,926
4-6 p.m. 85 199 2,705
6-8 p.m. 26 50 855
8-10 p.m. 30 71 1,138
10-12 p.m. 19 56 1,092
__________ __________ __________ _________________
Total: 606 1,512 20,057
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 169 487 656
Davis 148 1 149
Irvine 84 0 84
Los Angeles 0 137 137
Riverside 8 11 19
San Diego 56 24 80
San Francisco 62 0 62
Santa Barbara 13 39 52
Santa Cruz 55 4 59
LBL 0 18 18
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 6 44 50
Stanford 2
Other-Network UC n/a 142 142
_______ ______ _____
601 909 1,512
Number of FIND commands by database
MAGS database 1,291
NEWS database 124
COMP database 97
Total number of FIND commands 1,512
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,243 7,332 9,575
Davis 1,388 0 1,388
Irvine 586 0 586
Los Angeles 0 2,601 2,601
Riverside 23 22 45
San Diego 317 158 475
San Francisco 1,383 0 1,383
Santa Barbara 113 274 387
Santa Cruz 539 86 625
LBL 0 229 229
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 73 410 483
Stanford 1
Other-Network UC n/a 2,262 2,262
_______ ______ _____
6,665 13,376 20,042
Number of Records Displayed by database:
MAGS database 18,419
NEWS database 621
COMP database 1,017
Total number of Records Displayed 20,042
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.0%
Percent of NEWS sessions 9.1%
Percent of COMP sessions 5.9%
Percent of searches done in the MAGS database 85.4%
Percent of searches done in the NEWS database 8.2%
Percent of searches done in the COMP database 6.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 10.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 10.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 9:00
Average session length (minutes:seconds) 14:52
Longest session recorded (minutes:seconds) 443:01
Average number of searches completed per session 2.5
Retrievals per search - median 6.0
Retrievals per search - average 2265.1
Retrievals per search - standard deviation 32243
Percent of searches completed with 0 results 26.5%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 80.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,229 24.9%
DISPLAY (excluding automatic displays) 2,064 41.8%
HELP 111 2.2%
EXPLAIN 106 2.1%
SET/RESET 230 4.7%
SHOW 27 0.5%
ADD ON (AND, OR, AND NOT) 62 1.3%
LOGON or LOGOFF 645 13.1%
COMMENT 0 0.0%
SAVE 117 2.4%
USE 4 0.1%
OTHER 339 6.9%
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 251 19.3% 63 25.1% 10 99.2 454.4
TITLE WORD 323 24.8% 87 26.9% 11 200.3 847.8
EXACT TITLE 44 3.4% 17 38.6% 3 208.4 654.8
JOURNAL 72 5.5% 32 44.4% 575 48138.4 168292
EXACT JOURNAL 20 1.5% 7 35.0% 42,156 49335.2 94518.9
SUBJECT 211 16.2% 72 34.1% 33 326.7 1219.8
EXACT SUBJECT 8 0.6% 2 25.0% 53 434.0 809.1
KEYWORD 284 21.8% 56 19.7% 25 907.4 4543.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 12 0.9% 2 16.7% 3 7.5 13.7
DATE 25 1.9% 4 16.0% 58 82.0 102.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 24 1.8% 0 0.0% 10 128.3 322.0
EXACT PE 16 1.2% 4 25.0% 4 8.3 9.4
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 11 0.8% 0 0.0% 120 971.3 1310.8
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 76 6.2% 17 22.4% 22 232.1 667.9
Single 1,147 93.8% 310 27.0% 17 3442.8 39908.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 62.8%
LONG 2.7%
FIELDS 0.8%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 29.4%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:47
Average session length (minutes:seconds) 12:21
Longest session recorded (minutes:seconds) 87:49
Average number of searches completed per session 2.7
Retrievals per search - median 2.0
Retrievals per search - average 136.1
Retrievals per search - standard deviation 404.1
Percent of searches completed with 0 results 34.4%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 97 28.9%
DISPLAY (excluding automatic displays) 143 42.6%
HELP 3 0.9%
EXPLAIN 5 1.5%
SET/RESET 16 4.8%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 45 13.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 27 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 19 17.4% 12 63.2% 1 153.9 401.8
TITLE WORD 24 22.0% 7 29.2% 5 16.4 35.3
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 9 8.3% 5 55.6% 245 433.5 486.3
EXACT JOURNAL 1 0.9% 1 100% 0 0.0 0.0
SUBJECT 6 5.5% 2 33.3% 118 295.3 446.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 36 33.0% 7 19.4% 33 207.5 412.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 5 4.6% 1 20.0% 503 729.0 877.0
DATE 7 6.4% 0 0.0% 22 28.1 37.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.8% 0 0.0% 1,391 1391.0 1964.3
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 11 11.5% 2 18.2% 22 332.7 655.6
Single 85 88.5% 31 36.5% 8 186.6 455.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.8%
SHORT 63.9%
LONG 0.4%
FIELDS 0.0%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 31.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 546
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 27
displays or when any of these paging options is set.
TEXT included with MAIL commands 133
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:01
Average session length (minutes:seconds) 7:14
Longest session recorded (minutes:seconds) 64:33
Average number of searches completed per session 2.3
Retrievals per search - median 2.0
Retrievals per search - average 347.0
Retrievals per search - standard deviation 1652.0
Percent of searches completed with 0 results 42.7%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 115 33.4%
DISPLAY (excluding automatic displays) 80 23.3%
HELP 11 3.2%
EXPLAIN 16 4.7%
SET/RESET 22 6.4%
SHOW 4 1.2%
ADD ON (AND, OR, AND NOT) 9 2.6%
LOGON or LOGOFF 70 20.3%
COMMENT 0 0.0%
SAVE 4 1.2%
USE 0 0.0%
OTHER 13 3.8%
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 8 6.6% 4 50.0% 20 438.8 848.9
TITLE WORD 35 28.7% 15 42.9% 12 328.0 731.4
EXACT TITLE 3 2.5% 2 66.7% 1 1.0 0.0
JOURNAL 7 5.7% 7 100% 0 0.0 0.0
EXACT JOURNAL 2 1.6% 2 100% 0 0.0 0.0
SUBJECT 16 13.1% 9 56.3% 24 206.6 478.4
EXACT SUBJECT 1 0.8% 1 100% 0 0.0 0.0
KEYWORD 45 36.9% 13 28.9% 41 1036.1 3107.4
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 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 0.8% 0 0.0% 34 34.0 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 4 3.3% 3 75.0% 2 2.0 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 7 6.1% 5 71.4% 13 13.0 15.6
Single 108 93.9% 46 42.6% 27 692.0 2293.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 48.4%
LONG 8.1%
FIELDS 0.0%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 41.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.2%
Ten most frequent errors:
1. First word of command is invalid 36.4%
2. NS command - no next screen 27.9%
3. FIND command with invalid index name 10.2%
4. DISPLAY command contains invalid word 3.3%
5. PS command - no previous screen 2.8%
6. Search term missing from search command 2.2%
7. DISPLAY command - no FIND results 1.4%
8. DISPLAY command-record numbers too large 1.4%
9. MAIL command issued w/o email address 1.1%
10. NS of SHOW/EXP command-no next screen 0.9%
11. All others 12.3%
Ten most frequent EXPLAIN requests:
1. FIND 16.5%
2. GUIDE 14.2%
3. INDEXES 14.2%
4. COMMANDS 11.8%
5. LOCATE (ARTICLE DBS) 9.4%
6. MAGS DATABASE 3.9%
7. DATABASES 3.1%
8. MAIL 2.4%
9. Unrecognized term 2.4%
10. NEWS DATABASE 1.6%
11. All others 20.5%
Ten most frequent HELP situations:
1. Help requested from SET DB command 31.0%
2. First word of command is invalid 15.5%
3. DISPLAY command-first of >1 screen 8.7%
4. FIND command with zero results 7.5%
5. FIND command with invalid index name 6.7%
6. DISPLAY command-complete in one screen 6.3%
7. FIND command retrieves >1 book 3.2%
8. DISPLAY command - last of >1 screen 2.4%
9. 3 HELP commands issued from same code 2.0%
10. Multi-index search with zero results 2.0%
11. All others 14.7%
Ten most frequent SHOW requests:
1. HISTORY 43.3%
2. IAC NEWS 20.0%
3. SEARCH 13.3%
4. SYSTEM NEWS 10.0%
5. SETTINGS (IAC DBS) 6.7%
6. MAIL STATUS 6.7%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)