MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/02/01 through 06/08/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 44 206 250
Davis 171 0 171
Irvine 128 0 128
Los Angeles 3 108 111
Riverside 44 19 63
San Diego 9 46 55
San Francisco 30 0 30
Santa Barbara 26 46 72
Santa Cruz 39 26 65
LBL 0 21 21
LLL 0 1 1
Los Alamos n/a 1 1
Other - UC 1 14 15
Stanford 27
Other-Network UC n/a 126 126
_______ ______ _____
495 614 1,136
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 23 59 951
2-4 a.m. 6 35 862
4-6 a.m. 7 8 39
6-8 a.m. 33 97 781
8-10 a.m. 113 236 2,577
10-12 a.m. 213 604 8,389
12-2 p.m. 186 419 4,566
2-4 p.m. 227 579 5,165
4-6 p.m. 147 452 5,832
6-8 p.m. 45 113 890
8-10 p.m. 79 219 2,307
10-12 p.m. 57 147 1,412
__________ __________ __________ _________________
Total: 1,136 2,968 33,771
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 93 525 618
Davis 425 0 425
Irvine 386 0 386
Los Angeles 4 277 281
Riverside 78 52 130
San Diego 17 97 114
San Francisco 56 0 56
Santa Barbara 91 138 229
Santa Cruz 115 44 159
LBL 0 36 36
LLL 0 2 2
Los Alamos n/a 2 2
Other - UC 1 35 36
Stanford 74
Other-Network UC n/a 420 420
_______ ______ _____
1,266 1,628 2,968
Number of FIND commands by database
MAGS database 2,553
NEWS database 321
COMP database 94
Total number of FIND commands 2,968
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,215 5,272 6,487
Davis 3,788 0 3,788
Irvine 3,164 0 3,164
Los Angeles 43 3,864 3,907
Riverside 1,040 492 1,532
San Diego 179 1,105 1,284
San Francisco 646 0 646
Santa Barbara 727 908 1,635
Santa Cruz 1,280 505 1,785
LBL 0 216 216
LLL 0 6 6
Los Alamos n/a 12 12
Other - UC 7 543 550
Stanford 138
Other-Network UC n/a 7,979 7,979
_______ ______ _____
12,089 20,902 33,129
Number of Records Displayed by database:
MAGS database 30,813
NEWS database 1,975
COMP database 983
Total number of Records Displayed 33,129
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.7%
Percent of NEWS sessions 11.5%
Percent of COMP sessions 3.8%
Percent of searches done in the MAGS database 86.0%
Percent of searches done in the NEWS database 10.8%
Percent of searches done in the COMP database 3.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
Standard deviation in seconds 5.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:30
Average session length (minutes:seconds) 11:32
Longest session recorded (minutes:seconds) 329:47
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 885.7
Retrievals per search - standard deviation 12142
Percent of searches completed with 0 results 28.0%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 71.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,336 27.5%
DISPLAY (excluding automatic displays) 3,344 39.3%
HELP 157 1.8%
EXPLAIN 126 1.5%
SET/RESET 380 4.5%
SHOW 21 0.2%
ADD ON (AND, OR, AND NOT) 217 2.6%
LOGON or LOGOFF 1,246 14.7%
COMMENT 0 0.0%
SAVE 168 2.0%
USE 1 0.0%
OTHER 502 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 533 21.5% 142 26.6% 10 48.7 149.0
TITLE WORD 475 19.2% 145 30.5% 13 710.3 5583.3
EXACT TITLE 67 2.7% 28 41.8% 3 7.8 12.8
JOURNAL 142 5.7% 61 43.0% 1,416 5984.9 10936.9
EXACT JOURNAL 81 3.3% 34 42.0% 927 2599.1 7737.0
SUBJECT 359 14.5% 124 34.5% 29 395.3 1193.3
EXACT SUBJECT 22 0.9% 10 45.5% 8 100.4 272.4
KEYWORD 656 26.5% 119 18.1% 32 2419.3 25526.2
SUBFILE 1 0.0% 0 0.0% 1,399 1399.0 0.0
PUBLICATION TYPE 2 0.1% 0 0.0% 4,529 4529.0 5777.1
DATE 58 2.3% 10 17.2% 13 105.0 207.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 29 1.2% 8 27.6% 9 98.5 238.1
EXACT PE 13 0.5% 2 15.4% 8 136.2 370.4
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 39 1.6% 4 10.3% 661 2062.6 3734.4
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 148 6.4% 29 19.6% 13 1164.0 5254.9
Single 2,175 93.6% 629 28.9% 20 1337.1 15471.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 63.8%
LONG 1.2%
FIELDS 1.3%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 31.1%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 7:07
Average session length (minutes:seconds) 8:40
Longest session recorded (minutes:seconds) 40:11
Average number of searches completed per session 2.2
Retrievals per search - median 3.0
Retrievals per search - average 736.5
Retrievals per search - standard deviation 3764.5
Percent of searches completed with 0 results 35.1%
Percent of searches entered that are long 2.1%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 86 23.4%
DISPLAY (excluding automatic displays) 129 35.1%
HELP 12 3.3%
EXPLAIN 7 1.9%
SET/RESET 16 4.4%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 8 2.2%
LOGON or LOGOFF 68 18.5%
COMMENT 0 0.0%
SAVE 14 3.8%
USE 0 0.0%
OTHER 26 7.1%
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 9 9.5% 8 88.9% 12 12.0 0.0
TITLE WORD 16 16.8% 8 50.0% 23 1212.9 3262.5
EXACT TITLE 1 1.1% 1 100% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 3 3.2% 0 0.0% 43 57.7 26.3
SUBJECT 16 16.8% 10 62.5% 3 485.5 749.4
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 40 42.1% 2 5.0% 83 1476.8 5684.3
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 3.2% 0 0.0% 3 15.0 20.8
DATE 5 5.3% 0 0.0% 42 42.8 30.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 2.1% 1 50.0% 144 144.0 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 8 9.3% 0 0.0% 28 29.5 29.7
Single 78 90.7% 30 38.5% 106 1433.6 5198.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.0%
SHORT 55.7%
LONG 3.2%
FIELDS 0.5%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 29.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 669
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 42
displays or when any of these paging options is set.
TEXT included with MAIL commands 135
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:56
Average session length (minutes:seconds) 10:51
Longest session recorded (minutes:seconds) 82:08
Average number of searches completed per session 2.4
Retrievals per search - median 3.0
Retrievals per search - average 424.1
Retrievals per search - standard deviation 2570.4
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 305 35.9%
DISPLAY (excluding automatic displays) 215 25.3%
HELP 23 2.7%
EXPLAIN 11 1.3%
SET/RESET 67 7.9%
SHOW 1 0.1%
ADD ON (AND, OR, AND NOT) 16 1.9%
LOGON or LOGOFF 159 18.7%
COMMENT 0 0.0%
SAVE 20 2.4%
USE 0 0.0%
OTHER 32 3.8%
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 29 9.0% 10 34.5% 358 474.1 566.2
TITLE WORD 92 28.6% 31 33.7% 13 160.4 773.3
EXACT TITLE 7 2.2% 4 57.1% 1 1.0 0.0
JOURNAL 3 0.9% 1 33.3% 11,948 11948.0 16890.0
EXACT JOURNAL 1 0.3% 1 100% 0 0.0 0.0
SUBJECT 34 10.6% 12 35.3% 14 31.2 50.0
EXACT SUBJECT 7 2.2% 1 14.3% 7 71.0 115.7
KEYWORD 130 40.4% 42 32.3% 19 1013.3 4071.3
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 17 5.3% 6 35.3% 23 2286.6 7168.6
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 0.6% 0 0.0% 62 61.5 65.8
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 20 6.6% 7 35.0% 7 1850.7 6622.3
Single 282 93.4% 94 33.3% 18 585.8 2847.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 47.2%
LONG 2.7%
FIELDS 1.7%
PERIODICALS 0.4%
COMMENTS 0.0%
Other 44.9%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.2%
Ten most frequent errors:
1. First word of command is invalid 35.5%
2. NS command - no next screen 29.7%
3. FIND command with invalid index name 12.9%
4. DISPLAY command contains invalid word 3.6%
5. Search term missing from search command 2.8%
6. PS command - no previous screen 2.6%
7. DISPLAY command - no FIND results 1.2%
8. Valid command at an inappropriate time 1.1%
9. DISPLAY command-record numbers too large 1.1%
10. 815 0.8%
11. All others 8.5%
Ten most frequent EXPLAIN requests:
1. GUIDE 31.2%
2. LOCATE (ARTICLE DBS) 17.4%
3. FIND 13.9%
4. MAGS DATABASE 6.9%
5. INDEXES 5.6%
6. COMMANDS 3.5%
7. DISPLAYS (IAC DBS) 3.5%
8. MAIL 2.1%
9. DATABASES 2.1%
10. ADDON SEARCH 2.1%
11. All others 11.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 28.0%
2. First word of command is invalid 25.3%
3. FIND command with invalid index name 10.4%
4. DISPLAY command - middle of >1 screen 6.3%
5. DISPLAY command-complete in one screen 3.9%
6. FIND command retrieves >1 book 3.6%
7. FIND command with zero results 3.0%
8. DISPLAY command-first of >1 screen 3.0%
9. PS command - no previous screen 2.7%
10. DISPLAY command - last of >1 screen 1.8%
11. All others 12.2%
Ten most frequent SHOW requests:
1. HISTORY 54.5%
2. SEARCH 36.4%
3. 2292 4.5%
4. MAIL STATUS 4.5%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)