MELVYL IAC DATABASES TELNET STATISTICS
Time period: 03/23/02 through 03/29/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 39 145 184
Davis 44 0 44
Irvine 17 0 17
Los Angeles 1 27 28
Riverside 9 8 17
San Diego 7 14 21
San Francisco 9 0 9
Santa Barbara 0 6 6
Santa Cruz 5 16 21
LBL 0 1 1
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 1 15 16
Stanford 2
Other-Network UC n/a 62 62
_______ ______ _____
132 294 428
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 14 34 312
2-4 a.m. 5 19 392
4-6 a.m. 0 0 0
6-8 a.m. 19 59 1,417
8-10 a.m. 46 114 949
10-12 a.m. 80 221 2,976
12-2 p.m. 102 267 3,497
2-4 p.m. 81 208 3,277
4-6 p.m. 42 67 836
6-8 p.m. 18 26 252
8-10 p.m. 10 46 396
10-12 p.m. 11 32 339
__________ __________ __________ _________________
Total: 428 1,093 14,643
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 87 423 510
Davis 88 0 88
Irvine 57 0 57
Los Angeles 23 49 72
Riverside 16 8 24
San Diego 13 28 41
San Francisco 34 0 34
Santa Barbara 0 7 7
Santa Cruz 15 42 57
LBL 0 8 8
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 5 39 44
Stanford 11
Other-Network UC n/a 140 140
_______ ______ _____
338 744 1,093
Number of FIND commands by database
MAGS database 1,006
NEWS database 72
COMP database 15
Total number of FIND commands 1,093
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,676 4,514 6,190
Davis 1,033 0 1,033
Irvine 327 0 327
Los Angeles 231 1,231 1,462
Riverside 111 158 269
San Diego 496 182 678
San Francisco 228 0 228
Santa Barbara 0 225 225
Santa Cruz 14 455 469
LBL 0 257 257
LLL 0 0 0
Los Alamos n/a 0 0
Other - UC 246 439 685
Stanford 7
Other-Network UC n/a 2,783 2,783
_______ ______ _____
4,362 10,244 14,613
Number of Records Displayed by database:
MAGS database 13,534
NEWS database 663
COMP database 446
Total number of Records Displayed 14,613
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 89.7%
Percent of NEWS sessions 7.7%
Percent of COMP sessions 2.6%
Percent of searches done in the MAGS database 92.0%
Percent of searches done in the NEWS database 6.6%
Percent of searches done in the COMP database 1.4%
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 3.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 8:05
Average session length (minutes:seconds) 13:28
Longest session recorded (minutes:seconds) 133:13
Average number of searches completed per session 2.6
Retrievals per search - median 5.0
Retrievals per search - average 425.9
Retrievals per search - standard deviation 2768.3
Percent of searches completed with 0 results 28.4%
Percent of searches entered that are long 2.7%
Percent of long searches completed
(includes partial results) 59.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 962 28.3%
DISPLAY (excluding automatic displays) 1,298 38.2%
HELP 83 2.4%
EXPLAIN 53 1.6%
SET/RESET 171 5.0%
SHOW 7 0.2%
ADD ON (AND, OR, AND NOT) 44 1.3%
LOGON or LOGOFF 452 13.3%
COMMENT 0 0.0%
SAVE 136 4.0%
USE 0 0.0%
OTHER 188 5.5%
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 231 23.2% 60 26.0% 15 64.7 219.7
TITLE WORD 275 27.6% 86 31.3% 13 337.0 1594.4
EXACT TITLE 15 1.5% 9 60.0% 6 6.3 5.4
JOURNAL 38 3.8% 18 47.4% 875 2768.5 4507.0
EXACT JOURNAL 39 3.9% 16 41.0% 234 8032.2 13344.5
SUBJECT 152 15.3% 46 30.3% 35 595.4 3234.7
EXACT SUBJECT 13 1.3% 7 53.8% 16 592.2 900.8
KEYWORD 142 14.3% 33 23.2% 25 358.0 1333.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.2% 1 50.0% 4 4.0 0.0
DATE 23 2.3% 2 8.7% 26 195.8 473.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 17 1.7% 0 0.0% 4 39.1 72.7
EXACT PE 45 4.5% 1 2.2% 3 7.8 16.6
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 3 0.3% 1 33.3% 59 59.0 33.9
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 43 4.5% 10 23.3% 22 127.5 385.2
Single 909 95.5% 260 28.6% 16 643.2 3407.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.1%
SHORT 60.3%
LONG 1.6%
FIELDS 1.1%
PERIODICALS 4.5%
COMMENTS 0.0%
Other 30.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 21:36
Average session length (minutes:seconds) 38:47
Longest session recorded (minutes:seconds) 111:05
Average number of searches completed per session 1.4
Retrievals per search - median 9.0
Retrievals per search - average 64.3
Retrievals per search - standard deviation 177.4
Percent of searches completed with 0 results 13.3%
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 13 11.5%
DISPLAY (excluding automatic displays) 63 55.8%
HELP 2 1.8%
EXPLAIN 6 5.3%
SET/RESET 8 7.1%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 2 1.8%
LOGON or LOGOFF 10 8.8%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 9 8.0%
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 2 11.8% 1 50.0% 18 18.0 0.0
TITLE WORD 5 29.4% 0 0.0% 14 163.6 301.7
EXACT TITLE 1 5.9% 0 0.0% 20 20.0 0.0
JOURNAL 1 5.9% 1 100% 0 0.0 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 1 5.9% 0 0.0% 14 14.0 0.0
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 4 23.5% 0 0.0% 24 24.0 22.6
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 3 17.6% 0 0.0% 9 16.0 19.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 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 4 30.8% 0 0.0% 12 15.5 15.9
Single 9 69.2% 2 22.2% 20 127.1 254.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.1%
SHORT 66.7%
LONG 1.2%
FIELDS 7.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 17.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 289
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 5
displays or when any of these paging options is set.
TEXT included with MAIL commands 60
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 7:06
Average session length (minutes:seconds) 20:10
Longest session recorded (minutes:seconds) 254:50
Average number of searches completed per session 2.2
Retrievals per search - median 6.5
Retrievals per search - average 101.0
Retrievals per search - standard deviation 250.1
Percent of searches completed with 0 results 43.1%
Percent of searches entered that are long 5.6%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 67 29.0%
DISPLAY (excluding automatic displays) 78 33.8%
HELP 4 1.7%
EXPLAIN 5 2.2%
SET/RESET 16 6.9%
SHOW 1 0.4%
ADD ON (AND, OR, AND NOT) 5 2.2%
LOGON or LOGOFF 36 15.6%
COMMENT 0 0.0%
SAVE 4 1.7%
USE 0 0.0%
OTHER 15 6.5%
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 10.0% 5 62.5% 176 388.7 527.2
TITLE WORD 20 25.0% 7 35.0% 20 208.1 363.2
EXACT TITLE 2 2.5% 2 100% 0 0.0 0.0
JOURNAL 6 7.5% 2 33.3% 33 65.0 83.6
EXACT JOURNAL 3 3.7% 1 33.3% 11 11.0 0.0
SUBJECT 16 20.0% 4 25.0% 45 207.3 354.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 21 26.2% 10 47.6% 34 48.9 53.4
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 4 5.0% 1 25.0% 9 252.3 428.4
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 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 12 17.9% 3 25.0% 11 115.4 244.0
Single 55 82.1% 25 45.5% 53 195.2 340.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 9.6%
SHORT 49.6%
LONG 3.7%
FIELDS 1.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 35.6%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 11.3%
Ten most frequent errors:
1. NS command - no next screen 33.1%
2. First word of command is invalid 29.7%
3. FIND command with invalid index name 11.2%
4. DISPLAY command contains invalid word 3.6%
5. PS command - no previous screen 3.6%
6. Search term missing from search command 2.5%
7. Valid command at an inappropriate time 1.3%
8. DISPLAY command - no FIND results 1.1%
9. DISPLAY command with >1 format 1.1%
10. Add-on search, no index name after verb 1.1%
11. All others 11.8%
Ten most frequent EXPLAIN requests:
1. GUIDE 18.8%
2. FIND 18.8%
3. ADDON SEARCH 12.5%
4. COMMANDS 9.4%
5. DISPLAYS (IAC DBS) 7.8%
6. INDEXES 6.3%
7. MAIL 6.3%
8. LOCATE (ARTICLE DBS) 6.3%
9. Unrecognized term 4.7%
10. MAGS DATABASE 3.1%
11. All others 6.3%
Ten most frequent HELP situations:
1. Help requested from SET DB command 20.9%
2. FIND command with invalid index name 13.7%
3. First word of command is invalid 12.4%
4. FIND command with zero results 11.1%
5. DISPLAY command-first of >1 screen 10.5%
6. FIND command retrieves >1 book 9.8%
7. DISPLAY command - middle of >1 screen 3.3%
8. PS command - no previous screen 2.6%
9. 3 HELP commands issued from same code 2.6%
10. DISPLAY command-complete in one screen 2.0%
11. All others 11.1%
Ten most frequent SHOW requests:
1. IAC NEWS 50.0%
2. SEARCH 25.0%
3. HISTORY 25.0%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)