MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/29/02 through 07/05/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 23 92 115
Davis 22 0 22
Irvine 35 0 35
Los Angeles 1 18 19
Riverside 0 5 5
San Diego 5 8 13
San Francisco 7 0 7
Santa Barbara 4 5 9
Santa Cruz 4 7 11
LBL 0 6 6
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 1 10 11
Stanford 0
Other-Network UC n/a 33 33
_______ ______ _____
102 185 287
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 5 14 113
2-4 a.m. 0 0 0
4-6 a.m. 2 10 59
6-8 a.m. 0 0 0
8-10 a.m. 39 107 1,169
10-12 a.m. 58 115 1,513
12-2 p.m. 56 184 2,188
2-4 p.m. 60 143 3,820
4-6 p.m. 26 57 562
6-8 p.m. 8 17 537
8-10 p.m. 16 24 408
10-12 p.m. 17 37 583
__________ __________ __________ _________________
Total: 287 708 10,952
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 46 209 255
Davis 39 0 39
Irvine 125 0 125
Los Angeles 5 43 48
Riverside 0 29 29
San Diego 15 37 52
San Francisco 16 0 16
Santa Barbara 6 6 12
Santa Cruz 2 13 15
LBL 0 22 22
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 1 15 16
Stanford 0
Other-Network UC n/a 75 75
_______ ______ _____
255 453 708
Number of FIND commands by database
MAGS database 621
NEWS database 49
COMP database 38
Total number of FIND commands 708
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 525 3,640 4,165
Davis 334 0 334
Irvine 1,237 0 1,237
Los Angeles 8 2,740 2,748
Riverside 0 207 207
San Diego 352 219 571
San Francisco 221 0 221
Santa Barbara 21 40 61
Santa Cruz 3 100 103
LBL 0 201 201
LLL 0 22 22
Los Alamos n/a 0 0
Other - UC 0 75 75
Stanford 0
Other-Network UC n/a 1,007 1,007
_______ ______ _____
2,701 8,251 10,952
Number of Records Displayed by database:
MAGS database 9,744
NEWS database 994
COMP database 214
Total number of Records Displayed 10,952
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.5%
Percent of NEWS sessions 9.1%
Percent of COMP sessions 3.5%
Percent of searches done in the MAGS database 87.7%
Percent of searches done in the NEWS database 6.9%
Percent of searches done in the COMP database 5.4%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.3
Standard deviation in seconds 0.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 0.5
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:35
Average session length (minutes:seconds) 18:20
Longest session recorded (minutes:seconds) 381:59
Average number of searches completed per session 2.5
Retrievals per search - median 5.0
Retrievals per search - average 288.9
Retrievals per search - standard deviation 2017.7
Percent of searches completed with 0 results 32.0%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 80.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 584 24.8%
DISPLAY (excluding automatic displays) 971 41.3%
HELP 74 3.1%
EXPLAIN 40 1.7%
SET/RESET 88 3.7%
SHOW 11 0.5%
ADD ON (AND, OR, AND NOT) 37 1.6%
LOGON or LOGOFF 348 14.8%
COMMENT 0 0.0%
SAVE 26 1.1%
USE 0 0.0%
OTHER 173 7.4%
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 97 15.9% 19 19.6% 12 37.7 86.6
TITLE WORD 185 30.4% 57 30.8% 15 665.5 4112.7
EXACT TITLE 8 1.3% 2 25.0% 53 1141.0 2521.9
JOURNAL 34 5.6% 23 67.6% 787 1784.0 1889.5
EXACT JOURNAL 19 3.1% 7 36.8% 49 476.3 679.4
SUBJECT 145 23.8% 49 33.8% 64 693.2 3501.2
EXACT SUBJECT 13 2.1% 6 46.2% 219 968.9 1419.5
KEYWORD 68 11.2% 15 22.1% 18 348.2 1742.6
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 10 1.6% 3 30.0% 35 26.3 19.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 17 2.8% 4 23.5% 4 50.8 146.2
EXACT PE 6 1.0% 0 0.0% 4 4.0 2.6
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 7 1.1% 3 42.9% 6 28.8 49.0
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 25 4.3% 6 24.0% 16 1829.7 7768.9
Single 558 95.7% 175 31.4% 19 374.8 1889.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 67.2%
LONG 1.3%
FIELDS 0.9%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 27.7%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:31
Average session length (minutes:seconds) 7:47
Longest session recorded (minutes:seconds) 24:55
Average number of searches completed per session 3.8
Retrievals per search - median 15.0
Retrievals per search - average 1456.1
Retrievals per search - standard deviation 7249.9
Percent of searches completed with 0 results 28.9%
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 29 31.5%
DISPLAY (excluding automatic displays) 30 32.6%
HELP 1 1.1%
EXPLAIN 0 0.0%
SET/RESET 3 3.3%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 9 9.8%
LOGON or LOGOFF 17 18.5%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 3 3.3%
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 1 3.2% 0 0.0% 12 12.0 0.0
TITLE WORD 9 29.0% 3 33.3% 102 311.7 542.0
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 19 61.3% 3 15.8% 111 3305.9 11099.9
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 2 6.5% 1 50.0% 12 12.0 0.0
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 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 2 6.9% 1 50.0% 12 12.0 0.0
Single 27 93.1% 5 18.5% 111 2489.3 9483.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 13.8%
SHORT 44.8%
LONG 0.0%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 41.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 275
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 10
displays or when any of these paging options is set.
TEXT included with MAIL commands 55
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 10:44
Average session length (minutes:seconds) 11:41
Longest session recorded (minutes:seconds) 44:56
Average number of searches completed per session 1.9
Retrievals per search - median 21.0
Retrievals per search - average 230.9
Retrievals per search - standard deviation 948.4
Percent of searches completed with 0 results 12.2%
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 41 23.6%
DISPLAY (excluding automatic displays) 62 35.6%
HELP 0 0.0%
EXPLAIN 0 0.0%
SET/RESET 15 8.6%
SHOW 5 2.9%
ADD ON (AND, OR, AND NOT) 8 4.6%
LOGON or LOGOFF 29 16.7%
COMMENT 0 0.0%
SAVE 1 0.6%
USE 0 0.0%
OTHER 13 7.5%
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 3 6.3% 0 0.0% 6 75.3 121.8
TITLE WORD 22 45.8% 2 9.1% 31 119.6 207.6
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 7 14.6% 0 0.0% 165 197.7 277.0
SUBJECT 9 18.8% 1 11.1% 13 28.8 46.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 7 14.6% 2 28.6% 462 1531.2 2856.2
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 0 0.0% 0 0.0% 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
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 17.1% 0 0.0% 165 197.7 277.0
Single 34 82.9% 5 14.7% 31 314.5 1223.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.8%
SHORT 47.2%
LONG 3.7%
FIELDS 6.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 39.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.4%
Ten most frequent errors:
1. First word of command is invalid 32.5%
2. NS command - no next screen 24.4%
3. FIND command with invalid index name 15.7%
4. PS command - no previous screen 6.8%
5. Search term missing from search command 5.1%
6. Valid command at an inappropriate time 3.0%
7. DISPLAY command contains invalid word 3.0%
8. SHOW command contains invalid word 1.1%
9. DISPLAY command - no FIND results 1.1%
10. MAIL command issued w/o email address 1.1%
11. All others 6.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.5%
2. LOCATE (ARTICLE DBS) 20.0%
3. INDEXES 10.0%
4. FIND 7.5%
5. COMMANDS 7.5%
6. DISPLAYS (IAC DBS) 7.5%
7. MAGS DATABASE 5.0%
8. Unrecognized term 5.0%
9. ABI TEXT 2.5%
10. MAIL 2.5%
11. All others 5.0%
Ten most frequent HELP situations:
1. First word of command is invalid 20.9%
2. Help requested from SET DB command 17.4%
3. FIND command with invalid index name 11.3%
4. DISPLAY command-first of >1 screen 8.7%
5. DISPLAY command - middle of >1 screen 7.0%
6. DISPLAY command contains invalid word 6.1%
7. NS command - no next screen 4.3%
8. PS command - no previous screen 4.3%
9. FIND command retrieves >1 book 3.5%
10. 3 HELP commands issued from same code 2.6%
11. All others 13.9%
Ten most frequent SHOW requests:
1. HISTORY 56.3%
2. IAC NEWS 12.5%
3. SETTINGS (IAC DBS) 12.5%
4. SEARCH 12.5%
5. MAIL STATUS 6.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)