MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/02/02 through 03/08/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 109 222 331
Davis 172 2 174
Irvine 55 0 55
Los Angeles 0 59 59
Riverside 10 13 23
San Diego 34 23 57
San Francisco 11 0 11
Santa Barbara 7 11 18
Santa Cruz 16 35 51
LBL 0 3 3
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 1 38 39
Stanford 8
Other-Network UC n/a 99 99
_______ ______ _____
415 506 929
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 11 49 697
2-4 a.m. 19 96 700
4-6 a.m. 5 34 161
6-8 a.m. 9 29 390
8-10 a.m. 71 197 2,451
10-12 a.m. 177 430 5,923
12-2 p.m. 181 451 5,160
2-4 p.m. 186 483 5,022
4-6 p.m. 121 364 5,632
6-8 p.m. 63 210 2,371
8-10 p.m. 49 122 1,434
10-12 p.m. 37 69 1,164
__________ __________ __________ _________________
Total: 929 2,534 31,105
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 268 629 897
Davis 482 7 489
Irvine 144 0 144
Los Angeles 0 176 176
Riverside 26 33 59
San Diego 89 41 130
San Francisco 22 0 22
Santa Barbara 36 17 53
Santa Cruz 20 96 116
LBL 0 6 6
LLL 0 5 5
Los Alamos n/a 0 0
Other - UC 1 140 141
Stanford 25
Other-Network UC n/a 271 271
_______ ______ _____
1,088 1,421 2,534
Number of FIND commands by database
MAGS database 2,333
NEWS database 142
COMP database 59
Total number of FIND commands 2,534
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,617 9,331 12,948
Davis 4,579 81 4,660
Irvine 784 0 784
Los Angeles 0 2,089 2,089
Riverside 521 372 893
San Diego 1,601 283 1,884
San Francisco 546 0 546
Santa Barbara 198 117 315
Santa Cruz 136 1,030 1,166
LBL 0 71 71
LLL 0 150 150
Los Alamos n/a 0 0
Other - UC 2 1,254 1,256
Stanford 49
Other-Network UC n/a 4,037 4,037
_______ ______ _____
11,984 18,815 30,848
Number of Records Displayed by database:
MAGS database 29,463
NEWS database 1,219
COMP database 423
Total number of Records Displayed 30,848
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 88.7%
Percent of NEWS sessions 8.3%
Percent of COMP sessions 3.0%
Percent of searches done in the MAGS database 92.1%
Percent of searches done in the NEWS database 5.6%
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 0.5
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) 5:51
Average session length (minutes:seconds) 13:11
Longest session recorded (minutes:seconds) 397:16
Average number of searches completed per session 2.8
Retrievals per search - median 4.0
Retrievals per search - average 307.6
Retrievals per search - standard deviation 2253.2
Percent of searches completed with 0 results 29.6%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 55.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,245 29.1%
DISPLAY (excluding automatic displays) 2,899 37.6%
HELP 248 3.2%
EXPLAIN 168 2.2%
SET/RESET 240 3.1%
SHOW 31 0.4%
ADD ON (AND, OR, AND NOT) 88 1.1%
LOGON or LOGOFF 1,217 15.8%
COMMENT 0 0.0%
SAVE 121 1.6%
USE 1 0.0%
OTHER 454 5.9%
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 444 18.9% 101 22.7% 11 66.0 248.1
TITLE WORD 581 24.8% 163 28.1% 11 450.6 3269.0
EXACT TITLE 63 2.7% 33 52.4% 2 8.9 15.0
JOURNAL 105 4.5% 53 50.5% 156 2743.9 6673.1
EXACT JOURNAL 30 1.3% 14 46.7% 1,515 7939.4 13483.2
SUBJECT 572 24.4% 213 37.2% 28 266.5 799.2
EXACT SUBJECT 12 0.5% 4 33.3% 21 74.6 102.6
KEYWORD 383 16.3% 89 23.2% 32 382.9 1495.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.1% 1 33.3% 19 18.5 16.3
DATE 35 1.5% 6 17.1% 9 34.2 76.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 77 3.3% 11 14.3% 12 247.8 705.0
EXACT PE 26 1.1% 3 11.5% 2 34.6 94.5
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 16 0.7% 3 18.8% 287 481.4 654.4
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 121 5.4% 25 20.7% 10 98.4 285.6
Single 2,104 94.6% 643 30.6% 16 475.9 2820.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.5%
SHORT 60.1%
LONG 1.8%
FIELDS 0.9%
PERIODICALS 2.8%
COMMENTS 0.0%
Other 32.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 3:13
Average session length (minutes:seconds) 5:47
Longest session recorded (minutes:seconds) 29:25
Average number of searches completed per session 2.1
Retrievals per search - median 4.0
Retrievals per search - average 351.8
Retrievals per search - standard deviation 1620.8
Percent of searches completed with 0 results 32.8%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 59 31.4%
DISPLAY (excluding automatic displays) 40 21.3%
HELP 13 6.9%
EXPLAIN 5 2.7%
SET/RESET 6 3.2%
SHOW 2 1.1%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 43 22.9%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 20 10.6%
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 5 8.3% 5 100% 0 0.0 0.0
TITLE WORD 17 28.3% 4 23.5% 40 181.5 252.6
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 5 8.3% 4 80.0% 11,706 11706.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 7 11.7% 5 71.4% 1 1.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 19 31.7% 2 10.5% 29 370.5 1011.2
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 5 8.3% 0 0.0% 3 6.2 6.3
EXACT PE 2 3.3% 0 0.0% 5 5.0 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
By number of indexes:
Multiple 2 3.4% 1 50.0% 3 3.0 0.0
Single 56 96.6% 18 32.1% 18 536.9 1986.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.0%
SHORT 42.0%
LONG 0.0%
FIELDS 0.0%
PERIODICALS 12.5%
COMMENTS 0.0%
Other 45.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 643
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 45
displays or when any of these paging options is set.
TEXT included with MAIL commands 150
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:50
Average session length (minutes:seconds) 8:37
Longest session recorded (minutes:seconds) 49:12
Average number of searches completed per session 1.8
Retrievals per search - median 2.0
Retrievals per search - average 1411.3
Retrievals per search - standard deviation 12322
Percent of searches completed with 0 results 42.9%
Percent of searches entered that are long 2.8%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 133 31.3%
DISPLAY (excluding automatic displays) 82 19.3%
HELP 19 4.5%
EXPLAIN 11 2.6%
SET/RESET 31 7.3%
SHOW 3 0.7%
ADD ON (AND, OR, AND NOT) 9 2.1%
LOGON or LOGOFF 98 23.1%
COMMENT 0 0.0%
SAVE 12 2.8%
USE 0 0.0%
OTHER 27 6.4%
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 9 6.3% 2 22.2% 168 468.7 577.0
TITLE WORD 40 28.2% 19 47.5% 35 582.4 1989.2
EXACT TITLE 3 2.1% 2 66.7% 7 7.0 0.0
JOURNAL 5 3.5% 2 40.0% 799 48262.3 82901.0
EXACT JOURNAL 4 2.8% 2 50.0% 845 845.0 981.5
SUBJECT 41 28.9% 25 61.0% 42 271.2 528.7
EXACT SUBJECT 3 2.1% 2 66.7% 1,064 1064.0 0.0
KEYWORD 31 21.8% 7 22.6% 69 1324.8 4712.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.7% 0 0.0% 6 6.0 0.0
DATE 3 2.1% 0 0.0% 151 128.7 54.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 1.4% 0 0.0% 3 3.0 2.8
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 10 7.6% 3 30.0% 151 390.1 576.9
Single 121 92.4% 55 45.5% 53 2941.3 17891.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.6%
SHORT 43.0%
LONG 4.5%
FIELDS 1.1%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 45.3%
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 38.4%
2. NS command - no next screen 22.5%
3. FIND command with invalid index name 16.9%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 2.9%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 1.7%
8. DISPLAY command - no FIND results 1.4%
9. MAIL command issued w/o email address 1.3%
10. NS of SHOW/EXP command-no next screen 0.9%
11. All others 7.6%
Ten most frequent EXPLAIN requests:
1. GUIDE 34.2%
2. LOCATE (ARTICLE DBS) 17.9%
3. FIND 9.8%
4. COMMANDS 6.5%
5. Unrecognized term 6.0%
6. MAGS DATABASE 4.9%
7. INDEXES 3.8%
8. ADDON SEARCH 3.8%
9. DISPLAYS (IAC DBS) 2.7%
10. MAIL 1.1%
11. All others 9.2%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.2%
2. First word of command is invalid 23.7%
3. FIND command with invalid index name 12.1%
4. FIND command with zero results 6.9%
5. DISPLAY command-first of >1 screen 5.0%
6. DISPLAY command - middle of >1 screen 5.0%
7. FIND command retrieves >1 book 3.9%
8. DISPLAY command-complete in one screen 3.4%
9. NS command - no next screen 3.0%
10. Valid command at an inappropriate time 1.5%
11. All others 10.3%
Ten most frequent SHOW requests:
1. SEARCH 47.2%
2. HISTORY 22.2%
3. IAC NEWS 19.4%
4. GLOSSARY 5.6%
5. MAIL SETTINGS 2.8%
6. MAIL STATUS 2.8%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)