MELVYL IAC DATABASES TELNET STATISTICS
Time period: 09/29/01 through 10/05/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 91 242 333
Davis 109 0 109
Irvine 83 0 83
Los Angeles 1 66 67
Riverside 16 16 32
San Diego 10 11 21
San Francisco 42 0 42
Santa Barbara 5 27 32
Santa Cruz 11 14 25
LBL 0 15 15
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 2 34 36
Stanford 3
Other-Network UC n/a 77 77
_______ ______ _____
370 505 878
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 11 24 269
2-4 a.m. 12 26 514
4-6 a.m. 3 36 281
6-8 a.m. 18 46 500
8-10 a.m. 101 279 2,304
10-12 a.m. 145 369 3,485
12-2 p.m. 174 344 3,150
2-4 p.m. 183 435 5,076
4-6 p.m. 110 234 1,971
6-8 p.m. 69 173 4,123
8-10 p.m. 34 91 551
10-12 p.m. 18 40 329
__________ __________ __________ _________________
Total: 878 2,097 22,553
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 193 680 873
Davis 279 2 281
Irvine 152 0 152
Los Angeles 3 152 155
Riverside 31 38 69
San Diego 22 21 43
San Francisco 96 0 96
Santa Barbara 9 33 42
Santa Cruz 37 33 70
LBL 0 22 22
LLL 0 3 3
Los Alamos n/a 0 0
Other - UC 2 70 72
Stanford 5
Other-Network UC n/a 214 214
_______ ______ _____
824 1,268 2,097
Number of FIND commands by database
MAGS database 1,888
NEWS database 130
COMP database 79
Total number of FIND commands 2,097
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,932 7,155 9,087
Davis 1,836 10 1,846
Irvine 911 0 911
Los Angeles 15 3,015 3,030
Riverside 55 256 311
San Diego 193 656 849
San Francisco 1,221 0 1,221
Santa Barbara 118 586 704
Santa Cruz 165 174 339
LBL 0 329 329
LLL 0 32 32
Los Alamos n/a 0 0
Other - UC 24 1,037 1,061
Stanford 31
Other-Network UC n/a 2,700 2,700
_______ ______ _____
6,470 15,950 22,451
Number of Records Displayed by database:
MAGS database 21,321
NEWS database 643
COMP database 589
Total number of Records Displayed 22,451
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.6%
Percent of NEWS sessions 8.1%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 90.0%
Percent of searches done in the NEWS database 6.2%
Percent of searches done in the COMP database 3.8%
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 3.1
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.1
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:02
Average session length (minutes:seconds) 12:01
Longest session recorded (minutes:seconds) 408:56
Average number of searches completed per session 2.4
Retrievals per search - median 5.0
Retrievals per search - average 483.5
Retrievals per search - standard deviation 4941.6
Percent of searches completed with 0 results 30.6%
Percent of searches entered that are long 1.7%
Percent of long searches completed
(includes partial results) 66.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,762 27.3%
DISPLAY (excluding automatic displays) 2,397 37.2%
HELP 187 2.9%
EXPLAIN 147 2.3%
SET/RESET 299 4.6%
SHOW 23 0.4%
ADD ON (AND, OR, AND NOT) 126 2.0%
LOGON or LOGOFF 1,009 15.6%
COMMENT 0 0.0%
SAVE 127 2.0%
USE 1 0.0%
OTHER 372 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 384 20.9% 111 28.9% 9 82.0 326.2
TITLE WORD 495 26.9% 157 31.7% 14 222.8 1145.3
EXACT TITLE 52 2.8% 27 51.9% 2 680.8 1856.8
JOURNAL 88 4.8% 36 40.9% 1,058 6327.0 13195.8
EXACT JOURNAL 51 2.8% 17 33.3% 899 3174.6 5058.2
SUBJECT 385 20.9% 138 35.8% 33 193.3 503.4
EXACT SUBJECT 27 1.5% 7 25.9% 386 964.5 1188.0
KEYWORD 308 16.7% 66 21.4% 28 946.6 11309.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 7 0.4% 4 57.1% 2 1.7 0.6
DATE 15 0.8% 3 20.0% 5 136.9 352.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 20 1.1% 6 30.0% 8 15.6 20.3
EXACT PE 4 0.2% 0 0.0% 10 9.8 9.0
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 5 0.3% 1 20.0% 90 1085.8 2044.1
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 87 5.0% 28 32.2% 5 54.4 184.0
Single 1,660 95.0% 514 31.0% 20 739.6 6147.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 61.1%
LONG 1.3%
FIELDS 2.2%
PERIODICALS 0.6%
COMMENTS 0.0%
Other 31.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:15
Average session length (minutes:seconds) 5:22
Longest session recorded (minutes:seconds) 45:13
Average number of searches completed per session 2.1
Retrievals per search - median 18.0
Retrievals per search - average 1635.6
Retrievals per search - standard deviation 10989
Percent of searches completed with 0 results 24.0%
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 71 23.9%
DISPLAY (excluding automatic displays) 91 30.6%
HELP 10 3.4%
EXPLAIN 8 2.7%
SET/RESET 14 4.7%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 8 2.7%
LOGON or LOGOFF 49 16.5%
COMMENT 0 0.0%
SAVE 17 5.7%
USE 0 0.0%
OTHER 28 9.4%
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 14 17.3% 8 57.1% 3 32.3 65.4
TITLE WORD 22 27.2% 5 22.7% 26 6084.8 23528.8
EXACT TITLE 1 1.2% 1 100% 0 0.0 0.0
JOURNAL 1 1.2% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 2 2.5% 0 0.0% 379 379.0 534.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 31 38.3% 5 16.1% 109 942.5 2187.3
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 9 11.1% 0 0.0% 27 34.6 22.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.2% 0 0.0% 11 11.0 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 10 14.1% 1 10.0% 27 34.6 22.0
Single 61 85.9% 18 29.5% 165 2990.7 14837.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.9%
SHORT 57.8%
LONG 0.6%
FIELDS 1.2%
PERIODICALS 2.3%
COMMENTS 0.0%
Other 35.3%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 544
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 13
displays or when any of these paging options is set.
TEXT included with MAIL commands 94
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 3:55
Average session length (minutes:seconds) 7:54
Longest session recorded (minutes:seconds) 38:08
Average number of searches completed per session 1.8
Retrievals per search - median 2.0
Retrievals per search - average 118.4
Retrievals per search - standard deviation 365.2
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 6.2%
Percent of long searches completed
(includes partial results) 37.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 116 30.4%
DISPLAY (excluding automatic displays) 80 21.0%
HELP 24 6.3%
EXPLAIN 15 3.9%
SET/RESET 35 9.2%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 14 3.7%
LOGON or LOGOFF 76 19.9%
COMMENT 0 0.0%
SAVE 3 0.8%
USE 0 0.0%
OTHER 18 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 8 7.0% 2 25.0% 32 641.8 1007.3
TITLE WORD 27 23.5% 3 11.1% 10 116.3 306.0
EXACT TITLE 2 1.7% 2 100% 0 0.0 0.0
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 28 24.3% 15 53.6% 200 481.1 631.8
EXACT SUBJECT 2 1.7% 0 0.0% 382 381.5 525.4
KEYWORD 27 23.5% 11 40.7% 14 80.7 137.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.9% 0 0.0% 2 2.0 0.0
DATE 1 0.9% 0 0.0% 41 41.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 15 13.0% 3 20.0% 3 6.5 6.8
EXACT PE 4 3.5% 0 0.0% 2 3.5 3.8
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 4 3.6% 0 0.0% 24 200.8 368.6
Single 107 96.4% 36 33.6% 11 189.8 464.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 37.7%
LONG 1.7%
FIELDS 1.7%
PERIODICALS 10.3%
COMMENTS 0.0%
Other 45.1%
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 37.0%
2. NS command - no next screen 21.6%
3. FIND command with invalid index name 13.4%
4. PS command - no previous screen 4.9%
5. DISPLAY command contains invalid word 3.2%
6. NS of SHOW/EXP command-no next screen 2.2%
7. Search term missing from search command 1.9%
8. Valid command at an inappropriate time 1.2%
9. Add-on search, no index name after verb 1.1%
10. MAIL command issued w/o email address 1.1%
11. All others 12.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.1%
2. LOCATE (ARTICLE DBS) 14.1%
3. COMMANDS 8.2%
4. FIND 6.5%
5. INDEXES 6.5%
6. MAGS DATABASE 5.3%
7. ADDON SEARCH 4.7%
8. DATABASES 4.1%
9. Unrecognized term 2.4%
10. A031 1.8%
11. All others 19.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.9%
2. First word of command is invalid 20.5%
3. FIND command with invalid index name 8.2%
4. FIND command with zero results 7.2%
5. DISPLAY command - middle of >1 screen 5.9%
6. FIND command retrieves >1 book 4.1%
7. DISPLAY command-complete in one screen 3.8%
8. DISPLAY command - last of >1 screen 1.5%
9. 723 1.5%
10. PS command - no previous screen 1.3%
11. All others 18.2%
Ten most frequent SHOW requests:
1. HISTORY 41.7%
2. IAC NEWS 16.7%
3. SEARCH 12.5%
4. MAIL STATUS 8.3%
5. DATABASES 8.3%
6. SETTINGS (IAC DBS) 4.2%
7. Z39.50 NEWS 4.2%
8. 2292 4.2%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)