MELVYL IAC DATABASES TELNET STATISTICS
Time period: 05/04/02 through 05/10/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 86 158 244
Davis 96 0 96
Irvine 42 0 42
Los Angeles 0 37 37
Riverside 6 9 15
San Diego 24 7 31
San Francisco 8 0 8
Santa Barbara 11 11 22
Santa Cruz 7 19 26
LBL 0 5 5
LLL 0 1 1
Los Alamos n/a 0 0
Other - UC 8 26 34
Stanford 0
Other-Network UC n/a 46 46
_______ ______ _____
288 319 607
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 19 51 435
2-4 a.m. 2 5 54
4-6 a.m. 5 11 21
6-8 a.m. 9 20 68
8-10 a.m. 56 171 3,386
10-12 a.m. 114 279 2,509
12-2 p.m. 108 243 3,052
2-4 p.m. 139 311 3,665
4-6 p.m. 69 170 2,648
6-8 p.m. 41 133 1,684
8-10 p.m. 27 82 1,283
10-12 p.m. 18 45 604
__________ __________ __________ _________________
Total: 607 1,521 19,409
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 228 360 588
Davis 301 0 301
Irvine 80 0 80
Los Angeles 0 93 93
Riverside 8 16 24
San Diego 33 9 42
San Francisco 15 0 15
Santa Barbara 26 17 43
Santa Cruz 7 47 54
LBL 0 5 5
LLL 0 4 4
Los Alamos n/a 0 0
Other - UC 63 84 147
Stanford 0
Other-Network UC n/a 125 125
_______ ______ _____
761 760 1,521
Number of FIND commands by database
MAGS database 1,381
NEWS database 96
COMP database 44
Total number of FIND commands 1,521
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,555 4,193 7,748
Davis 4,578 0 4,578
Irvine 666 0 666
Los Angeles 0 1,387 1,387
Riverside 170 49 219
San Diego 183 15 198
San Francisco 247 0 247
Santa Barbara 272 646 918
Santa Cruz 31 825 856
LBL 0 134 134
LLL 0 19 19
Los Alamos n/a 0 0
Other - UC 89 722 811
Stanford 0
Other-Network UC n/a 1,628 1,628
_______ ______ _____
9,791 9,618 19,409
Number of Records Displayed by database:
MAGS database 18,327
NEWS database 863
COMP database 219
Total number of Records Displayed 19,409
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 86.7%
Percent of NEWS sessions 10.4%
Percent of COMP sessions 3.0%
Percent of searches done in the MAGS database 90.8%
Percent of searches done in the NEWS database 6.3%
Percent of searches done in the COMP database 2.9%
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) 6:46
Average session length (minutes:seconds) 11:10
Longest session recorded (minutes:seconds) 103:04
Average number of searches completed per session 2.6
Retrievals per search - median 4.0
Retrievals per search - average 487.4
Retrievals per search - standard deviation 4824.1
Percent of searches completed with 0 results 31.9%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 77.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,303 28.3%
DISPLAY (excluding automatic displays) 1,738 37.7%
HELP 136 2.9%
EXPLAIN 122 2.6%
SET/RESET 216 4.7%
SHOW 34 0.7%
ADD ON (AND, OR, AND NOT) 78 1.7%
LOGON or LOGOFF 691 15.0%
COMMENT 0 0.0%
SAVE 45 1.0%
USE 0 0.0%
OTHER 247 5.4%
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 256 19.1% 64 25.0% 13 70.8 198.1
TITLE WORD 309 23.1% 110 35.6% 10 248.5 1583.9
EXACT TITLE 29 2.2% 14 48.3% 5 4001.3 15449.8
JOURNAL 56 4.2% 31 55.4% 379 3888.0 7979.6
EXACT JOURNAL 33 2.5% 13 39.4% 566 3223.7 5821.0
SUBJECT 336 25.1% 144 42.9% 40 300.0 881.8
EXACT SUBJECT 10 0.7% 3 30.0% 71 79.9 90.4
KEYWORD 189 14.1% 32 16.9% 24 1830.7 12381.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 3 0.2% 1 33.3% 7 7.0 4.2
DATE 12 0.9% 1 8.3% 31 63.4 108.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 37 2.8% 6 16.2% 22 1092.8 5292.9
EXACT PE 8 0.6% 0 0.0% 2 3.3 2.8
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 61 4.6% 6 9.8% 1 607.4 2671.3
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 39 3.0% 8 20.5% 18 1043.6 3505.1
Single 1,260 97.0% 409 32.5% 16 744.2 6084.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 61.8%
LONG 1.8%
FIELDS 0.8%
PERIODICALS 2.3%
COMMENTS 0.0%
Other 31.2%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 2:12
Average session length (minutes:seconds) 4:27
Longest session recorded (minutes:seconds) 32:24
Average number of searches completed per session 2.4
Retrievals per search - median 1.0
Retrievals per search - average 301.3
Retrievals per search - standard deviation 1157.7
Percent of searches completed with 0 results 34.1%
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 44 32.4%
DISPLAY (excluding automatic displays) 36 26.5%
HELP 5 3.7%
EXPLAIN 8 5.9%
SET/RESET 7 5.1%
SHOW 2 1.5%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 27 19.9%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 7 5.1%
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 4 9.1% 3 75.0% 20 20.0 0.0
TITLE WORD 5 11.4% 1 20.0% 7 7.0 2.3
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 1 2.3% 0 0.0% 556 556.0 0.0
EXACT JOURNAL 1 2.3% 1 100% 0 0.0 0.0
SUBJECT 10 22.7% 1 10.0% 54 181.8 312.6
EXACT SUBJECT 2 4.5% 1 50.0% 7 7.0 0.0
KEYWORD 0 0.0% 0 0.0% 0 0.0 0.0
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 7 15.9% 4 57.1% 5,488 3659.0 3167.9
EXACT PE 1 2.3% 0 0.0% 22 22.0 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 13 29.5% 4 30.8% 1 1.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 44 100% 15 34.1% 7 457.1 1408.7
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.6%
SHORT 42.4%
LONG 0.0%
FIELDS 0.0%
PERIODICALS 6.1%
COMMENTS 0.0%
Other 43.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 322
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 5
displays or when any of these paging options is set.
TEXT included with MAIL commands 51
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 5:10
Average session length (minutes:seconds) 20:11
Longest session recorded (minutes:seconds) 417:36
Average number of searches completed per session 1.5
Retrievals per search - median 2.5
Retrievals per search - average 168.4
Retrievals per search - standard deviation 568.6
Percent of searches completed with 0 results 39.6%
Percent of searches entered that are long 1.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 89 28.3%
DISPLAY (excluding automatic displays) 64 20.4%
HELP 15 4.8%
EXPLAIN 19 6.1%
SET/RESET 32 10.2%
SHOW 1 0.3%
ADD ON (AND, OR, AND NOT) 7 2.2%
LOGON or LOGOFF 74 23.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 13 4.1%
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 13 14.0% 8 61.5% 144 802.2 1022.7
TITLE WORD 18 19.4% 6 33.3% 20 380.4 1193.4
EXACT TITLE 5 5.4% 2 40.0% 1 1.3 0.6
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 33 35.5% 14 42.4% 85 352.1 581.6
EXACT SUBJECT 1 1.1% 0 0.0% 66 66.0 0.0
KEYWORD 19 20.4% 5 26.3% 18 58.1 103.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 1.1% 0 0.0% 220 220.0 0.0
DATE 2 2.2% 1 50.0% 5 5.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 1 1.1% 0 0.0% 15 15.0 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
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 4.5% 2 50.0% 113 112.5 152.0
Single 85 95.5% 32 37.6% 24 300.7 741.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 0.8%
SHORT 52.0%
LONG 0.0%
FIELDS 1.6%
PERIODICALS 0.8%
COMMENTS 0.0%
Other 44.9%
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 36.3%
2. NS command - no next screen 22.2%
3. FIND command with invalid index name 12.2%
4. PS command - no previous screen 5.3%
5. DISPLAY command contains invalid word 4.1%
6. NS of SHOW/EXP command-no next screen 3.3%
7. Valid command at an inappropriate time 2.7%
8. Search term missing from search command 2.5%
9. DISPLAY command - no FIND results 1.1%
10. 178 0.7%
11. All others 9.7%
Ten most frequent EXPLAIN requests:
1. LOCATE (ARTICLE DBS) 32.2%
2. GUIDE 22.1%
3. INDEXES 8.7%
4. COMMANDS 6.0%
5. MAGS DATABASE 4.7%
6. Unrecognized term 3.4%
7. FIND 2.7%
8. DISPLAYS (IAC DBS) 2.0%
9. Unrecognized term-reminders off 2.0%
10. A016 1.3%
11. All others 14.8%
Ten most frequent HELP situations:
1. Help requested from SET DB command 30.2%
2. First word of command is invalid 19.7%
3. FIND command with invalid index name 10.5%
4. DISPLAY command - middle of >1 screen 6.6%
5. DISPLAY command-first of >1 screen 6.2%
6. DISPLAY command-complete in one screen 5.2%
7. FIND command with zero results 3.9%
8. FIND command retrieves 1 book 2.6%
9. NS command - no next screen 2.0%
10. FIND command retrieves >1 book 2.0%
11. All others 11.1%
Ten most frequent SHOW requests:
1. HISTORY 36.1%
2. SEARCH 27.8%
3. IAC NEWS 11.1%
4. MAIL STATUS 8.3%
5. SETTINGS (IAC DBS) 5.6%
6. MAIL SETTINGS 5.6%
7. GLOSSARY 2.8%
8. DISPLAY 2.8%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)