MELVYL IAC DATABASES TELNET STATISTICS
Time period: 04/21/01 through 04/27/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 193 436 629
Davis 181 2 183
Irvine 180 0 180
Los Angeles 2 102 104
Riverside 35 16 51
San Diego 49 30 79
San Francisco 32 0 32
Santa Barbara 9 21 30
Santa Cruz 96 109 205
LBL 0 7 7
LLL 0 2 2
Los Alamos n/a 0 0
Other - UC 3 81 84
Stanford 44
Other-Network UC n/a 121 121
_______ ______ _____
780 927 1,751
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 92 2,099
2-4 a.m. 12 45 422
4-6 a.m. 6 13 78
6-8 a.m. 11 18 201
8-10 a.m. 143 377 5,351
10-12 a.m. 305 920 10,425
12-2 p.m. 300 813 8,102
2-4 p.m. 355 930 9,976
4-6 p.m. 261 620 6,845
6-8 p.m. 136 394 5,136
8-10 p.m. 109 285 3,142
10-12 p.m. 90 210 1,776
__________ __________ __________ _________________
Total: 1,751 4,717 53,553
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 658 1,162 1,820
Davis 470 13 483
Irvine 523 0 523
Los Angeles 2 232 234
Riverside 125 44 169
San Diego 125 71 196
San Francisco 84 0 84
Santa Barbara 27 45 72
Santa Cruz 196 180 376
LBL 0 12 12
LLL 0 8 8
Los Alamos n/a 0 0
Other - UC 8 196 204
Stanford 152
Other-Network UC n/a 384 384
_______ ______ _____
2,218 2,347 4,717
Number of FIND commands by database
MAGS database 4,116
NEWS database 411
COMP database 190
Total number of FIND commands 4,717
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 6,791 14,700 21,491
Davis 4,345 72 4,417
Irvine 4,125 0 4,125
Los Angeles 14 4,374 4,388
Riverside 751 234 985
San Diego 886 897 1,783
San Francisco 801 0 801
Santa Barbara 113 550 663
Santa Cruz 1,637 767 2,404
LBL 0 90 90
LLL 0 72 72
Los Alamos n/a 0 0
Other - UC 56 4,760 4,816
Stanford 215
Other-Network UC n/a 5,629 5,629
_______ ______ _____
19,519 32,145 51,879
Number of Records Displayed by database:
MAGS database 49,465
NEWS database 2,689
COMP database 1,399
Total number of Records Displayed 51,879
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.7%
Percent of NEWS sessions 8.9%
Percent of COMP sessions 3.4%
Percent of searches done in the MAGS database 87.3%
Percent of searches done in the NEWS database 8.7%
Percent of searches done in the COMP database 4.0%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 1.9
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.9
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:14
Average session length (minutes:seconds) 11:22
Longest session recorded (minutes:seconds) 461:31
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 413.6
Retrievals per search - standard deviation 2942.5
Percent of searches completed with 0 results 30.2%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 59.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 3,883 28.7%
DISPLAY (excluding automatic displays) 4,916 36.3%
HELP 452 3.3%
EXPLAIN 362 2.7%
SET/RESET 586 4.3%
SHOW 69 0.5%
ADD ON (AND, OR, AND NOT) 233 1.7%
LOGON or LOGOFF 2,038 15.1%
COMMENT 0 0.0%
SAVE 209 1.5%
USE 2 0.0%
OTHER 784 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 806 20.0% 225 27.9% 10 73.4 301.5
TITLE WORD 732 18.1% 217 29.6% 11 149.1 618.9
EXACT TITLE 227 5.6% 117 51.5% 2 63.6 505.2
JOURNAL 249 6.2% 100 40.2% 908 3321.2 7506.5
EXACT JOURNAL 95 2.4% 40 42.1% 449 4570.8 9713.7
SUBJECT 856 21.2% 295 34.5% 40 371.0 2052.5
EXACT SUBJECT 13 0.3% 9 69.2% 339 498.0 599.5
KEYWORD 900 22.3% 184 20.4% 26 769.2 4789.0
SUBFILE 1 0.0% 0 0.0% 27 27.0 0.0
PUBLICATION TYPE 18 0.4% 3 16.7% 35 182.3 507.7
DATE 29 0.7% 7 24.1% 6 8.8 7.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 59 1.5% 14 23.7% 12 492.6 1961.7
EXACT PE 16 0.4% 4 25.0% 2 15.2 35.9
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 38 0.9% 9 23.7% 495 1226.8 1882.4
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 182 4.7% 49 26.9% 13 300.2 1006.4
Single 3,669 95.3% 1,124 30.6% 19 634.4 3698.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 61.6%
LONG 1.6%
FIELDS 1.1%
PERIODICALS 1.3%
COMMENTS 0.0%
Other 32.6%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 5:19
Average session length (minutes:seconds) 21:07
Longest session recorded (minutes:seconds) 388:50
Average number of searches completed per session 3.2
Retrievals per search - median 5.0
Retrievals per search - average 139.4
Retrievals per search - standard deviation 547.7
Percent of searches completed with 0 results 33.7%
Percent of searches entered that are long 6.3%
Percent of long searches completed
(includes partial results) 75.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 159 27.3%
DISPLAY (excluding automatic displays) 203 34.9%
HELP 10 1.7%
EXPLAIN 6 1.0%
SET/RESET 25 4.3%
SHOW 15 2.6%
ADD ON (AND, OR, AND NOT) 31 5.3%
LOGON or LOGOFF 71 12.2%
COMMENT 0 0.0%
SAVE 16 2.7%
USE 0 0.0%
OTHER 46 7.9%
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 11 5.4% 10 90.9% 4 4.0 0.0
TITLE WORD 49 24.3% 11 22.4% 16 222.5 583.2
EXACT TITLE 3 1.5% 3 100% 0 0.0 0.0
JOURNAL 1 0.5% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 36 17.8% 10 27.8% 26 366.4 996.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 62 30.7% 17 27.4% 21 120.7 256.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 2.0% 1 25.0% 19 21.3 4.0
DATE 34 16.8% 9 26.5% 13 38.8 61.4
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 1 0.5% 0 0.0% 2 2.0 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 1 0.5% 0 0.0% 3,886 3886.0 0.0
By number of indexes:
Multiple 43 27.6% 12 27.9% 16 89.8 254.9
Single 113 72.4% 38 33.6% 21 303.0 824.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.1%
SHORT 46.8%
LONG 2.4%
FIELDS 12.2%
PERIODICALS 0.3%
COMMENTS 0.0%
Other 37.2%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 1,026
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 46
displays or when any of these paging options is set.
TEXT included with MAIL commands 259
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 6:38
Average session length (minutes:seconds) 9:36
Longest session recorded (minutes:seconds) 55:43
Average number of searches completed per session 2.6
Retrievals per search - median 2.5
Retrievals per search - average 315.9
Retrievals per search - standard deviation 2325.1
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 25.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 394 37.2%
DISPLAY (excluding automatic displays) 237 22.4%
HELP 62 5.8%
EXPLAIN 51 4.8%
SET/RESET 74 7.0%
SHOW 9 0.8%
ADD ON (AND, OR, AND NOT) 17 1.6%
LOGON or LOGOFF 182 17.2%
COMMENT 0 0.0%
SAVE 1 0.1%
USE 0 0.0%
OTHER 33 3.1%
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 24 5.6% 7 29.2% 4 215.6 437.3
TITLE WORD 108 25.2% 24 22.2% 9 259.8 1464.6
EXACT TITLE 40 9.3% 18 45.0% 1 4.4 11.4
JOURNAL 1 0.2% 0 0.0% 12,026 12026.0 0.0
EXACT JOURNAL 4 0.9% 1 25.0% 40 69.0 65.5
SUBJECT 128 29.9% 58 45.3% 48 469.3 1342.5
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 82 19.2% 25 30.5% 14 1011.6 5527.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 4 0.9% 2 50.0% 125 124.5 89.8
DATE 29 6.8% 7 24.1% 9 37.5 67.9
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 6 1.4% 1 16.7% 10 15.6 18.5
EXACT PE 2 0.5% 0 0.0% 3 3.0 1.4
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 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 37 9.5% 10 27.0% 9 40.1 68.9
Single 354 90.5% 123 34.7% 12 551.2 3072.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.3%
SHORT 44.8%
LONG 2.8%
FIELDS 3.0%
PERIODICALS 1.5%
COMMENTS 0.0%
Other 46.7%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 13.0%
Ten most frequent errors:
1. First word of command is invalid 39.8%
2. NS command - no next screen 23.2%
3. FIND command with invalid index name 12.5%
4. PS command - no previous screen 6.0%
5. DISPLAY command contains invalid word 2.9%
6. Search term missing from search command 2.4%
7. Valid command at an inappropriate time 2.3%
8. DISPLAY command - no FIND results 0.8%
9. NS of SHOW/EXP command-no next screen 0.7%
10. MAIL command issued w/o email address 0.7%
11. All others 8.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.5%
2. LOCATE (ARTICLE DBS) 24.1%
3. FIND 8.6%
4. INDEXES 8.4%
5. COMMANDS 7.2%
6. MAGS DATABASE 4.5%
7. Unrecognized term 4.3%
8. DISPLAYS (IAC DBS) 2.6%
9. A055 1.4%
10. FIND LOCATION 1.4%
11. All others 11.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.3%
2. First word of command is invalid 20.9%
3. FIND command with invalid index name 9.5%
4. FIND command with zero results 7.2%
5. DISPLAY command-first of >1 screen 6.9%
6. DISPLAY command-complete in one screen 4.9%
7. DISPLAY command - middle of >1 screen 4.8%
8. PS command - no previous screen 2.5%
9. NS command - no next screen 2.3%
10. FIND command retrieves >1 book 1.9%
11. All others 12.7%
Ten most frequent SHOW requests:
1. SEARCH 32.6%
2. HISTORY 32.6%
3. MAIL STATUS 10.1%
4. MAIL SETTINGS 6.7%
5. SYSTEM NEWS 4.5%
6. IAC NEWS 3.4%
7. GLOSSARY 2.2%
8. SYSTEM5 NEWS 2.2%
9. LIBRARY LOCATIONS 2.2%
10. 0202 1.1%
11. All others 2.2%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)