MELVYL IAC DATABASES TELNET STATISTICS
Time period: 12/30/00 through 01/05/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 40 245 285
Davis 112 8 120
Irvine 55 0 55
Los Angeles 8 41 49
Riverside 22 17 39
San Diego 17 20 37
San Francisco 44 0 44
Santa Barbara 9 34 43
Santa Cruz 16 25 41
LBL 0 4 4
LLL 0 2 2
Los Alamos n/a 5 5
Other - UC 7 16 23
Stanford 38
Other-Network UC n/a 83 83
_______ ______ _____
330 500 868
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 4 20 209
2-4 a.m. 5 4 175
4-6 a.m. 5 10 156
6-8 a.m. 8 13 20
8-10 a.m. 78 223 2,194
10-12 a.m. 153 378 4,093
12-2 p.m. 168 446 4,293
2-4 p.m. 203 583 5,116
4-6 p.m. 104 289 2,493
6-8 p.m. 49 90 981
8-10 p.m. 46 141 1,637
10-12 p.m. 45 139 1,083
__________ __________ __________ _________________
Total: 868 2,336 22,450
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 96 550 646
Davis 291 13 304
Irvine 185 0 185
Los Angeles 24 144 168
Riverside 35 86 121
San Diego 44 36 80
San Francisco 170 0 170
Santa Barbara 24 74 98
Santa Cruz 39 123 162
LBL 0 3 3
LLL 0 1 1
Los Alamos n/a 9 9
Other - UC 9 34 43
Stanford 82
Other-Network UC n/a 264 264
_______ ______ _____
917 1,337 2,336
Number of FIND commands by database
MAGS database 2,145
NEWS database 128
COMP database 63
Total number of FIND commands 2,336
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 829 5,846 6,675
Davis 2,353 88 2,441
Irvine 1,773 0 1,773
Los Angeles 114 1,077 1,191
Riverside 159 759 918
San Diego 329 375 704
San Francisco 2,328 0 2,328
Santa Barbara 314 415 729
Santa Cruz 106 749 855
LBL 0 16 16
LLL 0 121 121
Los Alamos n/a 54 54
Other - UC 165 371 536
Stanford 116
Other-Network UC n/a 3,633 3,633
_______ ______ _____
8,470 13,504 22,090
Number of Records Displayed by database:
MAGS database 21,128
NEWS database 657
COMP database 665
Total number of Records Displayed 22,090
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.9%
Percent of NEWS sessions 7.9%
Percent of COMP sessions 5.2%
Percent of searches done in the MAGS database 91.8%
Percent of searches done in the NEWS database 5.5%
Percent of searches done in the COMP database 2.7%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 1.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 7:03
Average session length (minutes:seconds) 13:42
Longest session recorded (minutes:seconds) 640:22
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 603.1
Retrievals per search - standard deviation 4670.7
Percent of searches completed with 0 results 28.4%
Percent of searches entered that are long 1.1%
Percent of long searches completed
(includes partial results) 78.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,994 28.8%
DISPLAY (excluding automatic displays) 2,705 39.1%
HELP 135 2.0%
EXPLAIN 108 1.6%
SET/RESET 318 4.6%
SHOW 26 0.4%
ADD ON (AND, OR, AND NOT) 151 2.2%
LOGON or LOGOFF 953 13.8%
COMMENT 0 0.0%
SAVE 90 1.3%
USE 1 0.0%
OTHER 439 6.3%
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 566 27.0% 151 26.7% 9 68.7 257.3
TITLE WORD 486 23.2% 145 29.8% 10 187.8 1040.4
EXACT TITLE 39 1.9% 14 35.9% 2 3.1 2.3
JOURNAL 125 6.0% 58 46.4% 1,197 5382.0 9811.3
EXACT JOURNAL 51 2.4% 26 51.0% 1,218 14955.7 27908.2
SUBJECT 325 15.5% 120 36.9% 14 266.3 1769.6
EXACT SUBJECT 11 0.5% 1 9.1% 12 1435.4 3080.9
KEYWORD 388 18.5% 67 17.3% 31 1135.7 6400.9
SUBFILE 2 0.1% 0 0.0% 108 108.0 148.5
PUBLICATION TYPE 7 0.3% 1 14.3% 10 10.7 4.8
DATE 26 1.2% 3 11.5% 16 34.6 39.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 26 1.2% 2 7.7% 6 460.1 1795.4
EXACT PE 26 1.2% 6 23.1% 2 29.6 105.2
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 16 0.8% 0 0.0% 1,290 2189.9 2851.0
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 107 5.4% 28 26.2% 11 460.6 1527.6
Single 1,880 94.6% 538 28.6% 14 920.7 5857.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
SHORT 58.6%
LONG 3.7%
FIELDS 1.4%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 32.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:08
Average session length (minutes:seconds) 6:12
Longest session recorded (minutes:seconds) 36:11
Average number of searches completed per session 1.4
Retrievals per search - median 2.0
Retrievals per search - average 281.4
Retrievals per search - standard deviation 735.3
Percent of searches completed with 0 results 38.1%
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 57 21.4%
DISPLAY (excluding automatic displays) 84 31.6%
HELP 12 4.5%
EXPLAIN 8 3.0%
SET/RESET 16 6.0%
SHOW 3 1.1%
ADD ON (AND, OR, AND NOT) 6 2.3%
LOGON or LOGOFF 61 22.9%
COMMENT 0 0.0%
SAVE 1 0.4%
USE 0 0.0%
OTHER 18 6.8%
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 4 6.9% 2 50.0% 174 173.5 244.0
TITLE WORD 15 25.9% 3 20.0% 63 240.3 436.0
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 4 6.9% 3 75.0% 744 744.0 0.0
EXACT JOURNAL 3 5.2% 0 0.0% 693 1507.3 2039.3
SUBJECT 7 12.1% 4 57.1% 22 51.7 66.7
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 25 43.1% 10 40.0% 59 457.3 788.9
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 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
By number of indexes:
Multiple 1 1.8% 0 0.0% 744 744.0 0.0
Single 56 98.2% 22 39.3% 61 412.4 845.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 14.4%
SHORT 56.8%
LONG 1.5%
FIELDS 0.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 27.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 584
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 40
displays or when any of these paging options is set.
TEXT included with MAIL commands 117
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:24
Average session length (minutes:seconds) 10:26
Longest session recorded (minutes:seconds) 63:30
Average number of searches completed per session 1.9
Retrievals per search - median 2.0
Retrievals per search - average 65.6
Retrievals per search - standard deviation 202.6
Percent of searches completed with 0 results 35.2%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 121 31.3%
DISPLAY (excluding automatic displays) 93 24.1%
HELP 16 4.1%
EXPLAIN 5 1.3%
SET/RESET 32 8.3%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 7 1.8%
LOGON or LOGOFF 88 22.8%
COMMENT 0 0.0%
SAVE 2 0.5%
USE 0 0.0%
OTHER 22 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 17 12.7% 7 41.2% 12 196.5 264.6
TITLE WORD 49 36.6% 19 38.8% 6 127.8 310.9
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 2 1.5% 2 100% 0 0.0 0.0
EXACT JOURNAL 3 2.2% 0 0.0% 5 60.0 97.0
SUBJECT 21 15.7% 6 28.6% 6 105.9 284.7
EXACT SUBJECT 2 1.5% 1 50.0% 12 12.0 0.0
KEYWORD 30 22.4% 6 20.0% 8 34.3 63.7
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 7.5% 4 40.0% 40 235.5 454.2
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 11 9.1% 4 36.4% 9 202.0 424.0
Single 110 90.9% 37 33.6% 8 95.6 227.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
SHORT 42.0%
LONG 6.3%
FIELDS 2.9%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 43.0%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.1%
Ten most frequent errors:
1. NS command - no next screen 32.2%
2. First word of command is invalid 30.2%
3. FIND command with invalid index name 12.4%
4. DISPLAY command contains invalid word 3.2%
5. PS command - no previous screen 3.2%
6. MAIL command issued w/o email address 2.8%
7. Search term missing from search command 1.8%
8. Valid command at an inappropriate time 1.5%
9. Command contains escape or arrow key 1.3%
10. Index invalid in current database 1.1%
11. All others 10.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 21.5%
2. LOCATE (ARTICLE DBS) 13.2%
3. FIND 10.7%
4. COMMANDS 9.1%
5. INDEXES 8.3%
6. MAGS DATABASE 7.4%
7. DATABASES 6.6%
8. MAIL 5.8%
9. A028 2.5%
10. DISPLAYS (IAC DBS) 2.5%
11. All others 12.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.9%
2. First word of command is invalid 16.2%
3. FIND command with invalid index name 11.3%
4. FIND command with zero results 8.1%
5. DISPLAY command-complete in one screen 4.2%
6. DISPLAY command-first of >1 screen 3.9%
7. DISPLAY command - middle of >1 screen 3.5%
8. NS command - no next screen 3.2%
9. MAIL command entered w/o email address 3.2%
10. FIND command retrieves >1 book 2.5%
11. All others 14.1%
Ten most frequent SHOW requests:
1. HISTORY 57.1%
2. MAIL SETTINGS 7.1%
3. DISPLAY 7.1%
4. IAC NEWS 3.6%
5. SETTINGS (IAC DBS) 3.6%
6. Invalid term 3.6%
7. SYSTEM NEWS 3.6%
8. SUBFILE 3.6%
9. SEARCH 3.6%
10. MAIL STATUS 3.6%
11. All others 3.6%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)