MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/12/01 through 05/18/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 80 255 335
Davis 208 1 209
Irvine 203 0 203
Los Angeles 1 131 132
Riverside 76 22 98
San Diego 13 36 49
San Francisco 47 0 47
Santa Barbara 18 46 64
Santa Cruz 74 52 126
LBL 0 6 6
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 40 40
Stanford 50
Other-Network UC n/a 132 132
_______ ______ _____
720 721 1,491
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 22 46 2,414
2-4 a.m. 7 13 292
4-6 a.m. 12 46 607
6-8 a.m. 20 64 603
8-10 a.m. 111 252 3,017
10-12 a.m. 242 713 6,669
12-2 p.m. 247 614 5,930
2-4 p.m. 320 829 8,450
4-6 p.m. 221 669 5,832
6-8 p.m. 112 285 3,606
8-10 p.m. 116 387 2,486
10-12 p.m. 61 164 2,087
__________ __________ __________ _________________
Total: 1,491 4,082 41,993
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 205 615 820
Davis 477 1 478
Irvine 656 0 656
Los Angeles 1 401 402
Riverside 186 69 255
San Diego 25 76 101
San Francisco 141 0 141
Santa Barbara 33 102 135
Santa Cruz 224 110 334
LBL 0 17 17
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 2 118 120
Stanford 188
Other-Network UC n/a 435 435
_______ ______ _____
1,950 1,944 4,082
Number of FIND commands by database
MAGS database 3,574
NEWS database 416
COMP database 92
Total number of FIND commands 4,082
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,504 6,648 9,152
Davis 4,201 33 4,234
Irvine 5,643 0 5,643
Los Angeles 0 4,287 4,287
Riverside 1,003 508 1,511
San Diego 185 953 1,138
San Francisco 1,785 0 1,785
Santa Barbara 332 887 1,219
Santa Cruz 1,507 1,088 2,595
LBL 0 171 171
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 17 3,129 3,146
Stanford 244
Other-Network UC n/a 5,051 5,051
_______ ______ _____
17,177 22,755 40,176
Number of Records Displayed by database:
MAGS database 37,960
NEWS database 3,135
COMP database 898
Total number of Records Displayed 40,176
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.2%
Percent of NEWS sessions 10.6%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 87.6%
Percent of searches done in the NEWS database 10.2%
Percent of searches done in the COMP database 2.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.4
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:59
Average session length (minutes:seconds) 11:55
Longest session recorded (minutes:seconds) 720:05
Average number of searches completed per session 2.8
Retrievals per search - median 6.0
Retrievals per search - average 561.1
Retrievals per search - standard deviation 3829.3
Percent of searches completed with 0 results 29.9%
Percent of searches entered that are long 1.4%
Percent of long searches completed
(includes partial results) 58.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,308 28.8%
DISPLAY (excluding automatic displays) 4,288 37.4%
HELP 335 2.9%
EXPLAIN 244 2.1%
SET/RESET 479 4.2%
SHOW 31 0.3%
ADD ON (AND, OR, AND NOT) 266 2.3%
LOGON or LOGOFF 1,696 14.8%
COMMENT 0 0.0%
SAVE 195 1.7%
USE 3 0.0%
OTHER 633 5.5%
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 604 17.4% 179 29.6% 10 63.4 207.0
TITLE WORD 667 19.2% 218 32.7% 14 394.4 2482.4
EXACT TITLE 94 2.7% 47 50.0% 3 28.0 93.1
JOURNAL 214 6.2% 85 39.7% 803 3026.0 6498.1
EXACT JOURNAL 124 3.6% 49 39.5% 329 4516.2 9643.2
SUBJECT 681 19.7% 288 42.3% 39 187.4 462.5
EXACT SUBJECT 16 0.5% 4 25.0% 22 141.1 333.3
KEYWORD 905 26.1% 162 17.9% 17 828.2 5894.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.1% 0 0.0% 91 79.3 73.2
DATE 45 1.3% 11 24.4% 23 370.6 983.3
ADDED 4 0.1% 1 25.0% 44,434 35855.0 14859.3
PERIODICAL 41 1.2% 5 12.2% 6 196.8 906.4
EXACT PE 21 0.6% 3 14.3% 19 47.0 67.2
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 46 1.3% 6 13.0% 2,558 5916.0 8991.3
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 178 5.4% 54 30.3% 19 1126.7 3755.5
Single 3,108 94.6% 950 30.6% 19 791.2 4717.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.4%
SHORT 61.8%
LONG 1.7%
FIELDS 0.8%
PERIODICALS 1.2%
COMMENTS 0.0%
Other 32.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:45
Average session length (minutes:seconds) 7:18
Longest session recorded (minutes:seconds) 32:59
Average number of searches completed per session 1.9
Retrievals per search - median 8.0
Retrievals per search - average 717.1
Retrievals per search - standard deviation 3970.7
Percent of searches completed with 0 results 34.8%
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 86 24.8%
DISPLAY (excluding automatic displays) 117 33.7%
HELP 16 4.6%
EXPLAIN 15 4.3%
SET/RESET 18 5.2%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 6 1.7%
LOGON or LOGOFF 65 18.7%
COMMENT 0 0.0%
SAVE 2 0.6%
USE 1 0.3%
OTHER 21 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 14 14.7% 10 71.4% 2 73.0 142.7
TITLE WORD 22 23.2% 7 31.8% 18 143.7 308.8
EXACT TITLE 1 1.1% 1 100% 0 0.0 0.0
JOURNAL 2 2.1% 2 100% 0 0.0 0.0
EXACT JOURNAL 1 1.1% 0 0.0% 4,005 4005.0 0.0
SUBJECT 16 16.8% 3 18.8% 728 1094.2 1678.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 31 32.6% 10 32.3% 95 1990.1 8132.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 3.2% 2 66.7% 103 103.0 0.0
DATE 2 2.1% 2 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.1% 0 0.0% 8 8.0 0.0
EXACT PE 2 2.1% 0 0.0% 5 4.5 3.5
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 7 8.1% 5 71.4% 52 52.0 72.1
Single 79 91.9% 25 31.6% 69 1155.2 5141.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.1%
SHORT 58.5%
LONG 1.0%
FIELDS 2.1%
PERIODICALS 4.1%
COMMENTS 0.0%
Other 30.1%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 882
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 31
displays or when any of these paging options is set.
TEXT included with MAIL commands 185
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 8:17
Average session length (minutes:seconds) 10:59
Longest session recorded (minutes:seconds) 97:46
Average number of searches completed per session 2.6
Retrievals per search - median 3.0
Retrievals per search - average 1267.2
Retrievals per search - standard deviation 22078
Percent of searches completed with 0 results 35.8%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 55.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 398 38.2%
DISPLAY (excluding automatic displays) 276 26.5%
HELP 19 1.8%
EXPLAIN 13 1.2%
SET/RESET 85 8.2%
SHOW 9 0.9%
ADD ON (AND, OR, AND NOT) 18 1.7%
LOGON or LOGOFF 181 17.4%
COMMENT 0 0.0%
SAVE 6 0.6%
USE 0 0.0%
OTHER 37 3.6%
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 3.4% 10 62.5% 2 3.3 3.6
TITLE WORD 78 16.6% 36 46.2% 6 589.8 3049.8
EXACT TITLE 4 0.9% 4 100% 0 0.0 0.0
JOURNAL 2 0.4% 1 50.0% 447159 447159 0.0
EXACT JOURNAL 3 0.6% 0 0.0% 168 118.7 86.3
SUBJECT 99 21.1% 39 39.4% 32 228.8 792.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 197 42.0% 52 26.4% 13 235.8 860.2
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 68 14.5% 21 30.9% 8 28.0 42.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 0.4% 0 0.0% 24 23.5 26.2
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 75 19.1% 24 32.0% 10 34.3 62.1
Single 318 80.9% 115 36.2% 15 2552.2 31401.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.6%
SHORT 43.2%
LONG 3.8%
FIELDS 1.8%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 48.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.1%
Ten most frequent errors:
1. First word of command is invalid 32.3%
2. NS command - no next screen 27.1%
3. FIND command with invalid index name 13.5%
4. PS command - no previous screen 3.3%
5. DISPLAY command contains invalid word 3.1%
6. Valid command at an inappropriate time 2.6%
7. Search term missing from search command 1.9%
8. MAIL command issued w/o email address 1.6%
9. DISPLAY command - no FIND results 1.3%
10. NS of SHOW/EXP command-no next screen 1.0%
11. All others 12.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 30.1%
2. LOCATE (ARTICLE DBS) 14.3%
3. FIND 9.6%
4. INDEXES 8.1%
5. COMMANDS 7.4%
6. MAGS DATABASE 7.0%
7. Unrecognized term 4.4%
8. DISPLAYS (IAC DBS) 2.6%
9. ADDON SEARCH 2.6%
10. MAIL 1.8%
11. All others 12.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 29.0%
2. First word of command is invalid 17.6%
3. FIND command with invalid index name 13.7%
4. DISPLAY command - middle of >1 screen 5.3%
5. DISPLAY command-first of >1 screen 5.0%
6. FIND command with zero results 4.8%
7. FIND command retrieves >1 book 3.1%
8. DISPLAY command-complete in one screen 2.6%
9. PS command - no previous screen 1.9%
10. NS command - no next screen 1.7%
11. All others 15.3%
Ten most frequent SHOW requests:
1. HISTORY 50.0%
2. SEARCH 23.5%
3. GLOSSARY 5.9%
4. SYSTEM NEWS 5.9%
5. MAIL STATUS 5.9%
6. IAC NEWS 2.9%
7. SETTINGS (IAC DBS) 2.9%
8. LIBRARY NEWS 2.9%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)