MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/30/01 through 07/06/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 56 156 212
Davis 72 1 73
Irvine 60 0 60
Los Angeles 6 50 56
Riverside 25 15 40
San Diego 26 43 69
San Francisco 22 0 22
Santa Barbara 7 22 29
Santa Cruz 31 16 47
LBL 0 7 7
LLL 0 5 5
Los Alamos n/a 3 3
Other - UC 2 12 14
Stanford 40
Other-Network UC n/a 98 98
_______ ______ _____
307 428 775
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 18 48 620
2-4 a.m. 9 41 371
4-6 a.m. 4 5 7
6-8 a.m. 20 36 282
8-10 a.m. 76 209 2,011
10-12 a.m. 141 428 7,083
12-2 p.m. 168 507 16,327
2-4 p.m. 153 462 6,028
4-6 p.m. 104 291 11,046
6-8 p.m. 29 102 957
8-10 p.m. 25 73 655
10-12 p.m. 28 88 614
__________ __________ __________ _________________
Total: 775 2,290 46,001
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 151 367 518
Davis 240 2 242
Irvine 193 0 193
Los Angeles 16 104 120
Riverside 113 52 165
San Diego 127 135 262
San Francisco 70 0 70
Santa Barbara 10 58 68
Santa Cruz 115 80 195
LBL 0 25 25
LLL 0 8 8
Los Alamos n/a 3 3
Other - UC 11 9 20
Stanford 107
Other-Network UC n/a 294 294
_______ ______ _____
1,046 1,137 2,290
Number of FIND commands by database
MAGS database 2,018
NEWS database 107
COMP database 165
Total number of FIND commands 2,290
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,674 4,169 5,843
Davis 1,720 13 1,733
Irvine 957 0 957
Los Angeles 459 1,045 1,504
Riverside 770 562 1,332
San Diego 408 27,316 27,724
San Francisco 876 0 876
Santa Barbara 54 458 512
Santa Cruz 878 408 1,286
LBL 0 378 378
LLL 0 200 200
Los Alamos n/a 54 54
Other - UC 90 220 310
Stanford 159
Other-Network UC n/a 2,506 2,506
_______ ______ _____
7,886 37,329 45,374
Number of Records Displayed by database:
MAGS database 17,292
NEWS database 418
COMP database 28,291
Total number of Records Displayed 45,374
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.1%
Percent of NEWS sessions 9.2%
Percent of COMP sessions 6.7%
Percent of searches done in the MAGS database 88.1%
Percent of searches done in the NEWS database 4.7%
Percent of searches done in the COMP database 7.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.6
Standard deviation in seconds 2.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.3
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:57
Average session length (minutes:seconds) 10:34
Longest session recorded (minutes:seconds) 171:23
Average number of searches completed per session 3.1
Retrievals per search - median 5.0
Retrievals per search - average 664.7
Retrievals per search - standard deviation 4744.2
Percent of searches completed with 0 results 26.3%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 58.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,816 30.0%
DISPLAY (excluding automatic displays) 2,178 36.0%
HELP 108 1.8%
EXPLAIN 112 1.9%
SET/RESET 265 4.4%
SHOW 22 0.4%
ADD ON (AND, OR, AND NOT) 202 3.3%
LOGON or LOGOFF 847 14.0%
COMMENT 0 0.0%
SAVE 88 1.5%
USE 3 0.0%
OTHER 407 6.7%
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 484 25.1% 98 20.2% 8 58.5 274.7
TITLE WORD 443 23.0% 154 34.8% 9 374.6 2295.7
EXACT TITLE 40 2.1% 14 35.0% 3 51.6 184.8
JOURNAL 114 5.9% 54 47.4% 682 5525.6 15442.5
EXACT JOURNAL 52 2.7% 24 46.2% 559 3623.2 9013.9
SUBJECT 188 9.8% 62 33.0% 20 227.5 609.9
EXACT SUBJECT 10 0.5% 3 30.0% 47 80.0 87.3
KEYWORD 387 20.1% 84 21.7% 21 962.0 7035.9
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 11 0.6% 3 27.3% 16 17.1 17.1
DATE 50 2.6% 9 18.0% 7 42.5 135.8
ADDED 5 0.3% 0 0.0% 37,971 35046.8 14049.9
PERIODICAL 42 2.2% 6 14.3% 10 342.1 1343.8
EXACT PE 17 0.9% 2 11.8% 3 4.0 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 84 4.4% 5 6.0% 1,089 2814.5 5210.0
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 118 6.5% 31 26.3% 9 723.1 1898.6
Single 1,690 93.5% 455 26.9% 15 948.9 5920.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.6%
SHORT 59.4%
LONG 1.0%
FIELDS 0.7%
PERIODICALS 2.2%
COMMENTS 0.0%
Other 35.0%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 11:01
Average session length (minutes:seconds) 12:25
Longest session recorded (minutes:seconds) 49:06
Average number of searches completed per session 3.2
Retrievals per search - median 42.0
Retrievals per search - average 849.5
Retrievals per search - standard deviation 2522.9
Percent of searches completed with 0 results 14.5%
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 132 21.3%
DISPLAY (excluding automatic displays) 271 43.7%
HELP 6 1.0%
EXPLAIN 14 2.3%
SET/RESET 29 4.7%
SHOW 2 0.3%
ADD ON (AND, OR, AND NOT) 33 5.3%
LOGON or LOGOFF 88 14.2%
COMMENT 0 0.0%
SAVE 5 0.8%
USE 0 0.0%
OTHER 40 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 3 2.2% 1 33.3% 308 307.5 429.2
TITLE WORD 11 8.1% 5 45.5% 3 5.7 6.6
EXACT TITLE 0 0.0% 0 0.0% 0 0.0 0.0
JOURNAL 4 3.0% 3 75.0% 2,143 2143.0 0.0
EXACT JOURNAL 8 5.9% 5 62.5% 2,364 1592.7 1336.0
SUBJECT 2 1.5% 0 0.0% 458 457.5 644.2
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 104 77.0% 7 6.7% 141 1301.6 3188.2
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 2.2% 0 0.0% 125 217.0 271.9
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 3 2.3% 0 0.0% 125 217.0 271.9
Single 129 97.7% 21 16.3% 138 1241.6 3042.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.2%
SHORT 65.1%
LONG 0.5%
FIELDS 0.8%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 30.4%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 445
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 56
displays or when any of these paging options is set.
TEXT included with MAIL commands 79
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 2:02
Average session length (minutes:seconds) 4:49
Longest session recorded (minutes:seconds) 44:36
Average number of searches completed per session 1.5
Retrievals per search - median 2.0
Retrievals per search - average 8202.8
Retrievals per search - standard deviation 83372
Percent of searches completed with 0 results 31.4%
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 98 27.7%
DISPLAY (excluding automatic displays) 71 20.1%
HELP 15 4.2%
EXPLAIN 3 0.8%
SET/RESET 30 8.5%
SHOW 4 1.1%
ADD ON (AND, OR, AND NOT) 9 2.5%
LOGON or LOGOFF 97 27.4%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 27 7.6%
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 11 11.1% 6 54.5% 3 165.2 352.8
TITLE WORD 35 35.4% 15 42.9% 4 46.2 130.6
EXACT TITLE 2 2.0% 0 0.0% 3 2.5 2.1
JOURNAL 2 2.0% 1 50.0% 854376 854376 0.0
EXACT JOURNAL 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 11 11.1% 1 9.1% 49 156.9 239.7
EXACT SUBJECT 2 2.0% 1 50.0% 2 2.0 0.0
KEYWORD 35 35.4% 8 22.9% 5 102.0 273.8
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 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 1 1.0% 0 0.0% 399 399.0 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 2 2.1% 2 100% 0 0.0 0.0
Single 95 97.9% 28 29.5% 5 12848.6 104367
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.2%
SHORT 44.3%
LONG 2.5%
FIELDS 2.5%
PERIODICALS 0.0%
COMMENTS 0.0%
Other 42.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 10.2%
Ten most frequent errors:
1. First word of command is invalid 30.2%
2. NS command - no next screen 27.3%
3. FIND command with invalid index name 16.2%
4. Search term missing from search command 4.6%
5. DISPLAY command contains invalid word 4.5%
6. Valid command at an inappropriate time 2.3%
7. PS command - no previous screen 1.8%
8. Add-on search, no index name after verb 1.3%
9. DISPLAY command - no FIND results 0.9%
10. Invalid Publication Type entered 0.9%
11. All others 10.2%
Ten most frequent EXPLAIN requests:
1. GUIDE 19.4%
2. LOCATE (ARTICLE DBS) 14.0%
3. INDEXES 11.6%
4. Unrecognized term 9.3%
5. FIND 7.8%
6. COMMANDS 7.0%
7. DISPLAYS (IAC DBS) 5.4%
8. DATABASES 3.1%
9. ADDON SEARCH 3.1%
10. MAGS DATABASE 2.3%
11. All others 17.1%
Ten most frequent HELP situations:
1. Help requested from SET DB command 27.9%
2. First word of command is invalid 15.9%
3. FIND command with invalid index name 10.5%
4. FIND command with zero results 5.8%
5. DISPLAY command-complete in one screen 3.9%
6. F/BR command with invalid search term 3.5%
7. DISPLAY command-first of >1 screen 3.5%
8. DISPLAY command - middle of >1 screen 3.5%
9. FIND command retrieves >1 book 2.7%
10. NS command - no next screen 2.3%
11. All others 20.5%
Ten most frequent SHOW requests:
1. HISTORY 43.5%
2. SEARCH 30.4%
3. GLOSSARY 8.7%
4. IAC NEWS 4.3%
5. MAIL SETTINGS 4.3%
6. DISPLAY 4.3%
7. MAIL STATUS 4.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)