MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/30/02 through 04/05/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 64 214 278
Davis 58 2 60
Irvine 40 0 40
Los Angeles 2 42 44
Riverside 6 10 16
San Diego 15 18 33
San Francisco 16 0 16
Santa Barbara 2 13 15
Santa Cruz 4 21 25
LBL 0 4 4
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 30 30
Stanford 1
Other-Network UC n/a 73 73
_______ ______ _____
207 427 635
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 6 21 230
2-4 a.m. 1 1 3
4-6 a.m. 2 4 102
6-8 a.m. 13 32 259
8-10 a.m. 82 219 1,727
10-12 a.m. 114 315 3,651
12-2 p.m. 95 171 2,517
2-4 p.m. 123 312 3,085
4-6 p.m. 93 273 2,644
6-8 p.m. 35 92 720
8-10 p.m. 46 124 600
10-12 p.m. 25 49 400
__________ __________ __________ _________________
Total: 635 1,613 15,938
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 149 544 693
Davis 119 12 131
Irvine 126 0 126
Los Angeles 11 89 100
Riverside 11 22 33
San Diego 18 43 61
San Francisco 53 0 53
Santa Barbara 6 38 44
Santa Cruz 26 39 65
LBL 0 6 6
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 63 63
Stanford 4
Other-Network UC n/a 234 234
_______ ______ _____
519 1,090 1,613
Number of FIND commands by database
MAGS database 1,374
NEWS database 153
COMP database 86
Total number of FIND commands 1,613
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,262 6,943 8,205
Davis 728 262 990
Irvine 880 0 880
Los Angeles 86 777 863
Riverside 66 108 174
San Diego 257 192 449
San Francisco 1,262 0 1,262
Santa Barbara 95 115 210
Santa Cruz 39 568 607
LBL 0 295 295
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 0 566 566
Stanford 2
Other-Network UC n/a 1,420 1,420
_______ ______ _____
4,675 11,246 15,923
Number of Records Displayed by database:
MAGS database 14,377
NEWS database 1,097
COMP database 464
Total number of Records Displayed 15,923
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.5%
Percent of NEWS sessions 9.1%
Percent of COMP sessions 4.4%
Percent of searches done in the MAGS database 85.2%
Percent of searches done in the NEWS database 9.5%
Percent of searches done in the COMP database 5.3%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.4
Standard deviation in seconds 1.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 1.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 8:08
Average session length (minutes:seconds) 14:09
Longest session recorded (minutes:seconds) 201:00
Average number of searches completed per session 2.5
Retrievals per search - median 4.0
Retrievals per search - average 379.0
Retrievals per search - standard deviation 3021.5
Percent of searches completed with 0 results 31.0%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 59.1%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,317 27.5%
DISPLAY (excluding automatic displays) 1,927 40.2%
HELP 114 2.4%
EXPLAIN 105 2.2%
SET/RESET 226 4.7%
SHOW 6 0.1%
ADD ON (AND, OR, AND NOT) 57 1.2%
LOGON or LOGOFF 690 14.4%
COMMENT 0 0.0%
SAVE 102 2.1%
USE 1 0.0%
OTHER 247 5.2%
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 299 21.7% 87 29.1% 9 37.5 89.0
TITLE WORD 289 21.0% 102 35.3% 8 408.7 3378.6
EXACT TITLE 49 3.6% 9 18.4% 19 80.7 149.4
JOURNAL 35 2.5% 21 60.0% 3,003 11416.9 22902.5
EXACT JOURNAL 25 1.8% 12 48.0% 3,170 4056.2 4160.8
SUBJECT 335 24.4% 138 41.2% 61 536.1 1251.6
EXACT SUBJECT 10 0.7% 4 40.0% 29 29.0 4.4
KEYWORD 237 17.2% 50 21.1% 20 453.0 2071.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.6% 2 25.0% 6 6.5 5.0
DATE 24 1.7% 2 8.3% 45 70.9 91.7
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 28 2.0% 3 10.7% 8 49.9 95.0
EXACT PE 31 2.3% 0 0.0% 4 28.5 118.7
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 0.4% 0 0.0% 10,360 7100.0 6300.4
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 67 5.1% 23 34.3% 7 389.4 2103.7
Single 1,241 94.9% 384 30.9% 16 578.3 3768.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.8%
SHORT 64.1%
LONG 0.8%
FIELDS 0.7%
PERIODICALS 3.0%
COMMENTS 0.0%
Other 29.5%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 1:17
Average session length (minutes:seconds) 23:37
Longest session recorded (minutes:seconds) 214:18
Average number of searches completed per session 3.1
Retrievals per search - median 3.0
Retrievals per search - average 564.9
Retrievals per search - standard deviation 3416.6
Percent of searches completed with 0 results 22.1%
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 79 34.1%
DISPLAY (excluding automatic displays) 91 39.2%
HELP 4 1.7%
EXPLAIN 4 1.7%
SET/RESET 18 7.8%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 7 3.0%
LOGON or LOGOFF 20 8.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 9 3.9%
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 4 5.0% 4 100% 0 0.0 0.0
TITLE WORD 19 23.7% 5 26.3% 3 71.0 187.5
EXACT TITLE 2 2.5% 1 50.0% 1 1.0 0.0
JOURNAL 4 5.0% 1 25.0% 3,145 11371.7 16791.4
EXACT JOURNAL 1 1.2% 0 0.0% 7,306 7306.0 0.0
SUBJECT 9 11.2% 4 44.4% 4 4.6 2.6
EXACT SUBJECT 1 1.2% 1 100% 0 0.0 0.0
KEYWORD 16 20.0% 3 18.8% 10 394.2 972.8
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 18 22.5% 0 0.0% 4 7.2 12.3
EXACT PE 6 7.5% 0 0.0% 4 5.0 4.1
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 1 1.3% 1 100% 0 0.0 0.0
Single 78 98.7% 17 21.8% 5 782.3 4045.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.2%
SHORT 38.6%
LONG 0.0%
FIELDS 3.0%
PERIODICALS 17.5%
COMMENTS 0.0%
Other 36.7%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 346
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 9
displays or when any of these paging options is set.
TEXT included with MAIL commands 85
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:00
Average session length (minutes:seconds) 7:20
Longest session recorded (minutes:seconds) 44:17
Average number of searches completed per session 2.6
Retrievals per search - median 2.0
Retrievals per search - average 124.8
Retrievals per search - standard deviation 765.8
Percent of searches completed with 0 results 32.7%
Percent of searches entered that are long 0.7%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 145 37.4%
DISPLAY (excluding automatic displays) 115 29.6%
HELP 8 2.1%
EXPLAIN 7 1.8%
SET/RESET 32 8.2%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 8 2.1%
LOGON or LOGOFF 58 14.9%
COMMENT 0 0.0%
SAVE 3 0.8%
USE 0 0.0%
OTHER 11 2.8%
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 13 8.1% 5 38.5% 9 48.1 65.0
TITLE WORD 36 22.5% 16 44.4% 4 76.6 248.3
EXACT TITLE 9 5.6% 6 66.7% 1 58.0 98.7
JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1 0.6% 1 100% 0 0.0 0.0
SUBJECT 19 11.9% 10 52.6% 267 831.2 1943.6
EXACT SUBJECT 2 1.2% 0 0.0% 33 33.0 0.0
KEYWORD 14 8.7% 5 35.7% 8 981.0 2371.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 1.9% 2 66.7% 11 11.0 0.0
DATE 10 6.3% 3 30.0% 50 133.9 125.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 44 27.5% 5 11.4% 3 13.4 36.2
EXACT PE 9 5.6% 0 0.0% 5 8.0 6.3
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 15 10.3% 6 40.0% 50 105.4 122.4
Single 130 89.7% 41 31.5% 4 203.5 997.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 26.7%
LONG 0.8%
FIELDS 1.5%
PERIODICALS 27.9%
COMMENTS 0.0%
Other 40.8%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.8%
Ten most frequent errors:
1. First word of command is invalid 33.3%
2. NS command - no next screen 24.4%
3. FIND command with invalid index name 15.0%
4. PS command - no previous screen 5.3%
5. DISPLAY command contains invalid word 3.2%
6. Search term missing from search command 3.2%
7. Valid command at an inappropriate time 3.1%
8. DISPLAY command - no FIND results 1.4%
9. DISPLAY command-record numbers too large 1.4%
10. MAIL command issued w/o email address 1.1%
11. All others 8.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 30.2%
2. LOCATE (ARTICLE DBS) 20.7%
3. INDEXES 11.2%
4. MAGS DATABASE 6.0%
5. FIND 5.2%
6. COMMANDS 5.2%
7. Unrecognized term 2.6%
8. ADDON SEARCH 2.6%
9. NEWS DATABASE 1.7%
10. DISPLAYS (IAC DBS) 1.7%
11. All others 12.9%
Ten most frequent HELP situations:
1. Help requested from SET DB command 30.6%
2. First word of command is invalid 19.8%
3. FIND command with invalid index name 10.3%
4. DISPLAY command-complete in one screen 7.0%
5. DISPLAY command-first of >1 screen 5.8%
6. FIND command with zero results 4.1%
7. NS command - no next screen 2.5%
8. PS command - no previous screen 2.5%
9. FIND command retrieves 1 book 2.1%
10. FIND command retrieves >1 book 2.1%
11. All others 13.2%
Ten most frequent SHOW requests:
1. IAC NEWS 28.6%
2. SETTINGS (IAC DBS) 14.3%
3. GLOSSARY 14.3%
4. SYSTEM NEWS 14.3%
5. SEARCH 14.3%
6. HISTORY 14.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)