MELVYL IAC DATABASES TELNET STATISTICS
Time period: 08/04/01 through 08/10/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 74 204 278
Davis 74 0 74
Irvine 76 0 76
Los Angeles 0 40 40
Riverside 29 17 46
San Diego 17 27 44
San Francisco 25 0 25
Santa Barbara 9 9 18
Santa Cruz 10 26 36
LBL 0 26 26
LLL 0 1 1
Los Alamos n/a 1 1
Other - UC 1 18 19
Stanford 37
Other-Network UC n/a 99 99
_______ ______ _____
315 468 820
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 18 37 629
2-4 a.m. 2 11 91
4-6 a.m. 2 8 371
6-8 a.m. 23 57 551
8-10 a.m. 85 227 2,564
10-12 a.m. 148 357 3,869
12-2 p.m. 141 408 4,611
2-4 p.m. 220 579 40,032
4-6 p.m. 121 275 36,975
6-8 p.m. 21 82 976
8-10 p.m. 27 65 1,105
10-12 p.m. 12 35 794
__________ __________ __________ _________________
Total: 820 2,141 92,568
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 209 467 676
Davis 213 0 213
Irvine 197 0 197
Los Angeles 0 79 79
Riverside 68 35 103
San Diego 31 90 121
San Francisco 60 0 60
Santa Barbara 24 22 46
Santa Cruz 21 58 79
LBL 0 104 104
LLL 0 6 6
Los Alamos n/a 20 20
Other - UC 3 37 40
Stanford 141
Other-Network UC n/a 256 256
_______ ______ _____
826 1,174 2,141
Number of FIND commands by database
MAGS database 1,820
NEWS database 239
COMP database 82
Total number of FIND commands 2,141
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,503 4,360 5,863
Davis 2,673 0 2,673
Irvine 1,854 0 1,854
Los Angeles 0 1,508 1,508
Riverside 556 103 659
San Diego 201 68,065 68,266
San Francisco 905 0 905
Santa Barbara 288 154 442
Santa Cruz 447 1,489 1,936
LBL 0 1,600 1,600
LLL 0 32 32
Los Alamos n/a 207 207
Other - UC 170 1,760 1,930
Stanford 321
Other-Network UC n/a 2,748 2,748
_______ ______ _____
8,597 82,026 90,944
Number of Records Displayed by database:
MAGS database 86,945
NEWS database 2,155
COMP database 3,468
Total number of Records Displayed 90,944
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 84.5%
Percent of NEWS sessions 12.3%
Percent of COMP sessions 3.2%
Percent of searches done in the MAGS database 85.0%
Percent of searches done in the NEWS database 11.2%
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 0.6
Standard deviation in seconds 2.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 2.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:37
Average session length (minutes:seconds) 12:02
Longest session recorded (minutes:seconds) 210:45
Average number of searches completed per session 2.6
Retrievals per search - median 6.0
Retrievals per search - average 832.7
Retrievals per search - standard deviation 8816.5
Percent of searches completed with 0 results 29.5%
Percent of searches entered that are long 1.6%
Percent of long searches completed
(includes partial results) 55.2%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,689 25.3%
DISPLAY (excluding automatic displays) 2,951 44.2%
HELP 127 1.9%
EXPLAIN 127 1.9%
SET/RESET 293 4.4%
SHOW 12 0.2%
ADD ON (AND, OR, AND NOT) 131 2.0%
LOGON or LOGOFF 860 12.9%
COMMENT 0 0.0%
SAVE 97 1.5%
USE 2 0.0%
OTHER 382 5.7%
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 298 17.2% 70 23.5% 10 92.0 316.8
TITLE WORD 487 28.1% 146 30.0% 24 428.3 2659.6
EXACT TITLE 42 2.4% 18 42.9% 6 57.5 172.0
JOURNAL 83 4.8% 44 53.0% 3,344 17077.1 48218.9
EXACT JOURNAL 41 2.4% 20 48.8% 990 2688.6 5338.5
SUBJECT 259 15.0% 96 37.1% 26 309.2 887.2
EXACT SUBJECT 15 0.9% 3 20.0% 16 206.5 605.3
KEYWORD 440 25.4% 92 20.9% 28 990.4 6242.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 10 0.6% 1 10.0% 139 734.0 965.6
DATE 15 0.9% 3 20.0% 73 876.1 1321.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 22 1.3% 4 18.2% 17 1018.6 3069.7
EXACT PE 11 0.6% 1 9.1% 4 6.5 8.7
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 9 0.5% 0 0.0% 298 3279.7 5399.5
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 55 3.3% 12 21.8% 52 1089.3 2759.0
Single 1,619 96.7% 473 29.2% 20 1099.0 10038.1
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.9%
SHORT 62.9%
LONG 6.1%
FIELDS 1.3%
PERIODICALS 0.9%
COMMENTS 0.0%
Other 26.9%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:12
Average session length (minutes:seconds) 9:07
Longest session recorded (minutes:seconds) 34:24
Average number of searches completed per session 3.2
Retrievals per search - median 10.0
Retrievals per search - average 339.9
Retrievals per search - standard deviation 1333.7
Percent of searches completed with 0 results 18.3%
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 66 26.2%
DISPLAY (excluding automatic displays) 83 32.9%
HELP 9 3.6%
EXPLAIN 5 2.0%
SET/RESET 18 7.1%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 16 6.3%
LOGON or LOGOFF 33 13.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 22 8.7%
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 6 9.1% 2 33.3% 3 49.5 95.0
TITLE WORD 16 24.2% 4 25.0% 6 13.6 20.1
EXACT TITLE 1 1.5% 0 0.0% 2 2.0 0.0
JOURNAL 4 6.1% 2 50.0% 8,231 8231.0 0.0
EXACT JOURNAL 2 3.0% 2 100% 0 0.0 0.0
SUBJECT 9 13.6% 3 33.3% 25 306.8 706.6
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 25 37.9% 0 0.0% 89 327.5 708.7
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 1 1.5% 0 0.0% 33 33.0 0.0
EXACT PE 2 3.0% 1 50.0% 54 54.0 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 0 0.0% 0 0.0% 0 0.0 0.0
Single 66 100% 14 21.2% 30 518.1 1653.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
SHORT 58.6%
LONG 0.7%
FIELDS 0.7%
PERIODICALS 2.8%
COMMENTS 0.0%
Other 35.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 628
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 49
displays or when any of these paging options is set.
TEXT included with MAIL commands 118
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:05
Average session length (minutes:seconds) 9:02
Longest session recorded (minutes:seconds) 99:08
Average number of searches completed per session 2.3
Retrievals per search - median 4.0
Retrievals per search - average 595.1
Retrievals per search - standard deviation 4769.0
Percent of searches completed with 0 results 32.1%
Percent of searches entered that are long 0.8%
Percent of long searches completed
(includes partial results) 50.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 212 30.9%
DISPLAY (excluding automatic displays) 195 28.4%
HELP 18 2.6%
EXPLAIN 28 4.1%
SET/RESET 38 5.5%
SHOW 0 0.0%
ADD ON (AND, OR, AND NOT) 27 3.9%
LOGON or LOGOFF 131 19.1%
COMMENT 0 0.0%
SAVE 7 1.0%
USE 1 0.1%
OTHER 30 4.4%
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 32 14.3% 16 50.0% 478 807.8 761.1
TITLE WORD 65 29.0% 25 38.5% 24 588.4 2639.0
EXACT TITLE 2 0.9% 1 50.0% 18 18.0 0.0
JOURNAL 2 0.9% 0 0.0% 6,072 6072.0 8558.8
EXACT JOURNAL 1 0.4% 1 100% 0 0.0 0.0
SUBJECT 44 19.6% 11 25.0% 20 133.0 282.8
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 66 29.5% 16 24.2% 22 1748.2 9942.4
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 2 0.9% 0 0.0% 20 20.0 22.6
DATE 7 3.1% 0 0.0% 67 100.0 107.2
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 2 0.9% 1 50.0% 17 17.0 0.0
EXACT PE 1 0.4% 0 0.0% 48 48.0 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 5.7% 1 8.3% 43 85.9 96.8
Single 199 94.3% 69 34.7% 24 1071.8 6410.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.6%
SHORT 50.7%
LONG 1.8%
FIELDS 3.7%
PERIODICALS 1.0%
COMMENTS 0.0%
Other 40.2%
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 32.8%
2. NS command - no next screen 29.2%
3. FIND command with invalid index name 10.7%
4. DISPLAY command contains invalid word 4.2%
5. Valid command at an inappropriate time 3.6%
6. PS command - no previous screen 3.5%
7. Search term missing from search command 2.1%
8. DISPLAY command - no FIND results 1.3%
9. Add-on search, no index name after verb 1.3%
10. MAIL command issued w/o email address 1.1%
11. All others 10.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 24.4%
2. LOCATE (ARTICLE DBS) 15.0%
3. FIND 10.6%
4. INDEXES 8.1%
5. COMMANDS 6.3%
6. MAGS DATABASE 5.6%
7. Unrecognized term 5.6%
8. DATABASES 3.8%
9. MAIL 3.1%
10. DISPLAYS (IAC DBS) 2.5%
11. All others 15.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 25.8%
2. First word of command is invalid 20.1%
3. FIND command with invalid index name 8.9%
4. FIND command with zero results 8.3%
5. DISPLAY command-complete in one screen 6.7%
6. DISPLAY command-first of >1 screen 5.1%
7. DISPLAY command - middle of >1 screen 5.1%
8. FIND command retrieves >1 book 3.2%
9. NS command - no next screen 2.2%
10. MAIL command entered w/o email address 1.9%
11. All others 12.7%
Ten most frequent SHOW requests:
1. HISTORY 66.7%
2. SEARCH 25.0%
3. GLOSSARY 8.3%
11. All others 0.0%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)