MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/16/02 through 02/22/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 73 198 271
Davis 89 0 89
Irvine 82 0 82
Los Angeles 1 48 49
Riverside 6 4 10
San Diego 25 28 53
San Francisco 12 0 12
Santa Barbara 12 18 30
Santa Cruz 13 36 49
LBL 0 2 2
LLL 0 3 3
Los Alamos n/a 1 1
Other - UC 2 35 37
Stanford 7
Other-Network UC n/a 62 62
_______ ______ _____
315 435 757
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 7 13 850
2-4 a.m. 2 2 19
4-6 a.m. 9 22 189
6-8 a.m. 9 21 396
8-10 a.m. 46 108 974
10-12 a.m. 103 246 3,230
12-2 p.m. 160 443 5,479
2-4 p.m. 192 523 6,381
4-6 p.m. 110 297 3,644
6-8 p.m. 44 102 2,231
8-10 p.m. 44 121 1,117
10-12 p.m. 31 101 1,108
__________ __________ __________ _________________
Total: 757 1,999 25,618
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 230 524 754
Davis 209 0 209
Irvine 225 0 225
Los Angeles 1 115 116
Riverside 20 6 26
San Diego 59 63 122
San Francisco 17 0 17
Santa Barbara 24 60 84
Santa Cruz 25 76 101
LBL 0 9 9
LLL 0 10 10
Los Alamos n/a 1 1
Other - UC 3 140 143
Stanford 15
Other-Network UC n/a 167 167
_______ ______ _____
813 1,171 1,999
Number of FIND commands by database
MAGS database 1,817
NEWS database 132
COMP database 50
Total number of FIND commands 1,999
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,673 8,951 11,624
Davis 2,434 0 2,434
Irvine 1,071 0 1,071
Los Angeles 5 1,498 1,503
Riverside 161 47 208
San Diego 662 806 1,468
San Francisco 138 0 138
Santa Barbara 140 934 1,074
Santa Cruz 178 944 1,122
LBL 0 162 162
LLL 0 294 294
Los Alamos n/a 8 8
Other - UC 18 2,455 2,473
Stanford 77
Other-Network UC n/a 1,164 1,164
_______ ______ _____
7,480 17,263 24,820
Number of Records Displayed by database:
MAGS database 24,205
NEWS database 763
COMP database 650
Total number of Records Displayed 24,820
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.4%
Percent of NEWS sessions 9.6%
Percent of COMP sessions 4.0%
Percent of searches done in the MAGS database 90.9%
Percent of searches done in the NEWS database 6.6%
Percent of searches done in the COMP database 2.5%
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 3.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.2
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:49
Average session length (minutes:seconds) 12:12
Longest session recorded (minutes:seconds) 245:57
Average number of searches completed per session 2.8
Retrievals per search - median 5.0
Retrievals per search - average 293.0
Retrievals per search - standard deviation 1662.2
Percent of searches completed with 0 results 30.0%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 62.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,748 27.6%
DISPLAY (excluding automatic displays) 2,559 40.4%
HELP 177 2.8%
EXPLAIN 125 2.0%
SET/RESET 266 4.2%
SHOW 59 0.9%
ADD ON (AND, OR, AND NOT) 69 1.1%
LOGON or LOGOFF 835 13.2%
COMMENT 0 0.0%
SAVE 109 1.7%
USE 0 0.0%
OTHER 389 6.1%
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 383 21.0% 108 28.2% 12 105.9 820.0
TITLE WORD 501 27.5% 139 27.7% 17 388.7 1909.8
EXACT TITLE 71 3.9% 25 35.2% 1 22.4 121.1
JOURNAL 79 4.3% 34 43.0% 698 3572.6 6567.1
EXACT JOURNAL 58 3.2% 25 43.1% 1,158 2914.7 4257.7
SUBJECT 344 18.9% 139 40.4% 24 407.7 1333.5
EXACT SUBJECT 21 1.2% 1 4.8% 13 27.1 31.8
KEYWORD 277 15.2% 58 20.9% 18 98.9 270.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.3% 1 16.7% 11 89.8 141.2
DATE 25 1.4% 8 32.0% 40 82.9 182.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 37 2.0% 6 16.2% 6 49.7 137.6
EXACT PE 10 0.5% 1 10.0% 18 108.4 147.1
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 10 0.5% 1 10.0% 24 1744.3 4561.8
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 80 4.6% 27 33.7% 11 591.6 2594.1
Single 1,658 95.4% 491 29.6% 17 420.4 1977.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 63.0%
LONG 1.6%
FIELDS 1.3%
PERIODICALS 1.8%
COMMENTS 0.0%
Other 30.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 1:55
Average session length (minutes:seconds) 6:48
Longest session recorded (minutes:seconds) 34:20
Average number of searches completed per session 1.7
Retrievals per search - median 25.0
Retrievals per search - average 358.8
Retrievals per search - standard deviation 926.3
Percent of searches completed with 0 results 20.0%
Percent of searches entered that are long 2.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 38 22.1%
DISPLAY (excluding automatic displays) 42 24.4%
HELP 5 2.9%
EXPLAIN 10 5.8%
SET/RESET 14 8.1%
SHOW 3 1.7%
ADD ON (AND, OR, AND NOT) 12 7.0%
LOGON or LOGOFF 40 23.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 8 4.7%
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 7 17.5% 3 42.9% 6 14.8 21.0
TITLE WORD 5 12.5% 2 40.0% 43 1079.3 1805.4
EXACT TITLE 1 2.5% 0 0.0% 4 4.0 0.0
JOURNAL 1 2.5% 1 100% 0 0.0 0.0
EXACT JOURNAL 2 5.0% 0 0.0% 2,583 2583.0 0.0
SUBJECT 5 12.5% 0 0.0% 238 317.2 242.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 17 42.5% 3 17.6% 100 514.9 1252.8
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 5.0% 1 50.0% 4 4.0 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 5.3% 1 50.0% 4 4.0 0.0
Single 36 94.7% 8 22.2% 99 616.3 1179.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.8%
SHORT 43.8%
LONG 4.1%
FIELDS 4.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 41.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 571
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 16
displays or when any of these paging options is set.
TEXT included with MAIL commands 148
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:46
Average session length (minutes:seconds) 14:10
Longest session recorded (minutes:seconds) 183:30
Average number of searches completed per session 1.8
Retrievals per search - median 4.0
Retrievals per search - average 81.9
Retrievals per search - standard deviation 329.2
Percent of searches completed with 0 results 27.5%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 128 32.3%
DISPLAY (excluding automatic displays) 74 18.7%
HELP 18 4.5%
EXPLAIN 24 6.1%
SET/RESET 30 7.6%
SHOW 3 0.8%
ADD ON (AND, OR, AND NOT) 4 1.0%
LOGON or LOGOFF 91 23.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 1 0.3%
OTHER 23 5.8%
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 16 12.1% 2 12.5% 5 54.0 115.8
TITLE WORD 44 33.3% 6 13.6% 21 171.8 550.7
EXACT TITLE 11 8.3% 3 27.3% 1 1.1 0.4
JOURNAL 1 0.8% 0 0.0% 35 35.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 29 22.0% 15 51.7% 47 162.3 319.0
EXACT SUBJECT 2 1.5% 2 100% 0 0.0 0.0
KEYWORD 23 17.4% 7 30.4% 8 67.0 206.7
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 4 3.0% 0 0.0% 10 36.8 60.3
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 2 1.5% 0 0.0% 6 6.0 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 5 3.9% 0 0.0% 11 36.4 52.2
Single 122 96.1% 35 28.7% 9 120.3 398.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 42.6%
LONG 1.5%
FIELDS 4.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 49.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.1%
Ten most frequent errors:
1. First word of command is invalid 36.4%
2. NS command - no next screen 25.8%
3. FIND command with invalid index name 15.9%
4. PS command - no previous screen 4.8%
5. DISPLAY command contains invalid word 3.1%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 1.5%
8. DISPLAY command - no FIND results 1.4%
9. MAIL command issued w/o email address 0.9%
10. SHOW command contains invalid word 0.8%
11. All others 7.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.8%
2. FIND 13.8%
3. LOCATE (ARTICLE DBS) 12.6%
4. INDEXES 10.7%
5. COMMANDS 10.7%
6. Unrecognized term 5.0%
7. MAGS DATABASE 3.8%
8. DISPLAYS (IAC DBS) 3.1%
9. DATES 2.5%
10. ADDON SEARCH 1.9%
11. All others 10.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 31.2%
2. First word of command is invalid 21.2%
3. FIND command with invalid index name 10.9%
4. FIND command with zero results 6.1%
5. DISPLAY command - middle of >1 screen 5.3%
6. DISPLAY command-first of >1 screen 3.6%
7. FIND command retrieves >1 book 3.3%
8. PS command - no previous screen 3.1%
9. DISPLAY command-complete in one screen 2.5%
10. DISPLAY command - last of >1 screen 1.7%
11. All others 11.1%
Ten most frequent SHOW requests:
1. SEARCH 52.3%
2. HISTORY 21.5%
3. MAIL STATUS 12.3%
4. IAC NEWS 7.7%
5. SETTINGS (IAC DBS) 1.5%
6. SYSTEM NEWS 1.5%
7. MAIL SETTINGS 1.5%
8. 3002 1.5%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)