MELVYL IAC DATABASES TELNET STATISTICS
Time period: 02/01/01 through 02/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 706 1,533 2,239
Davis 1,001 14 1,015
Irvine 740 0 740
Los Angeles 29 521 550
Riverside 261 95 356
San Diego 107 167 274
San Francisco 233 0 233
Santa Barbara 322 207 529
Santa Cruz 439 290 729
LBL 0 56 56
LLL 0 15 15
Los Alamos n/a 2 2
Other - UC 6 190 196
Stanford 212
Other-Network UC n/a 661 661
_______ ______ _____
3,844 3,751 7,807
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 104 296 4,870
2-4 a.m. 42 128 2,994
4-6 a.m. 29 71 2,144
6-8 a.m. 99 227 3,160
8-10 a.m. 601 1,699 16,897
10-12 a.m. 1,187 3,142 37,955
12-2 p.m. 1,487 3,969 44,110
2-4 p.m. 1,700 4,305 57,573
4-6 p.m. 1,213 3,244 37,393
6-8 p.m. 585 1,699 22,722
8-10 p.m. 444 1,293 16,382
10-12 p.m. 316 885 11,544
__________ __________ __________ _________________
Total: 7,807 20,958 257,744
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,043 4,101 6,144
Davis 2,384 35 2,419
Irvine 2,230 0 2,230
Los Angeles 51 1,458 1,509
Riverside 686 217 903
San Diego 316 400 716
San Francisco 596 0 596
Santa Barbara 812 537 1,349
Santa Cruz 1,086 623 1,709
LBL 0 117 117
LLL 0 36 36
Los Alamos n/a 5 5
Other - UC 11 609 620
Stanford 737
Other-Network UC n/a 1,868 1,868
_______ ______ _____
10,215 10,006 20,958
Number of FIND commands by database
MAGS database 18,628
NEWS database 1,776
COMP database 554
Total number of FIND commands 20,958
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 24,860 54,040 78,900
Davis 23,552 478 24,030
Irvine 20,745 0 20,745
Los Angeles 1,180 23,601 24,781
Riverside 4,992 2,200 7,192
San Diego 1,675 11,802 13,477
San Francisco 9,477 0 9,477
Santa Barbara 7,526 8,578 16,104
Santa Cruz 7,827 6,135 13,962
LBL 0 1,733 1,733
LLL 0 513 513
Los Alamos n/a 43 43
Other - UC 111 7,697 7,808
Stanford 1,181
Other-Network UC n/a 31,567 31,567
_______ ______ _____
101,945 148,387 251,513
Number of Records Displayed by database:
MAGS database 227,407
NEWS database 14,263
COMP database 16,074
Total number of Records Displayed 251,513
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 87.2%
Percent of NEWS sessions 9.3%
Percent of COMP sessions 3.6%
Percent of searches done in the MAGS database 88.9%
Percent of searches done in the NEWS database 8.5%
Percent of searches done in the COMP database 2.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 4.8
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.8
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 5:43
Average session length (minutes:seconds) 11:17
Longest session recorded (minutes:seconds) 434:58
Average number of searches completed per session 2.7
Retrievals per search - median 5.0
Retrievals per search - average 494.5
Retrievals per search - standard deviation 4244.8
Percent of searches completed with 0 results 30.5%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 47.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 17,560 28.4%
DISPLAY (excluding automatic displays) 23,217 37.5%
HELP 2,090 3.4%
EXPLAIN 1,360 2.2%
SET/RESET 2,476 4.0%
SHOW 259 0.4%
ADD ON (AND, OR, AND NOT) 1,068 1.7%
LOGON or LOGOFF 9,128 14.7%
COMMENT 0 0.0%
SAVE 1,181 1.9%
USE 17 0.0%
OTHER 3,544 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 3,739 20.5% 1,063 28.4% 9 65.1 253.4
TITLE WORD 3,691 20.3% 1,151 31.2% 11 381.2 3748.1
EXACT TITLE 700 3.8% 398 56.9% 3 28.2 264.7
JOURNAL 781 4.3% 389 49.8% 1,198 6017.5 17779.3
EXACT JOURNAL 454 2.5% 189 41.6% 833 4793.8 9894.3
SUBJECT 3,728 20.5% 1,463 39.2% 29 318.6 995.8
EXACT SUBJECT 175 1.0% 69 39.4% 63 1200.0 2534.4
KEYWORD 4,047 22.2% 699 17.3% 24 747.4 5102.1
SUBFILE 2 0.0% 0 0.0% 36 36.0 49.5
PUBLICATION TYPE 73 0.4% 10 13.7% 8 19.6 36.8
DATE 201 1.1% 49 24.4% 21 379.6 2295.6
ADDED 9 0.0% 0 0.0% 63,002 49610.9 18996.5
PERIODICAL 301 1.7% 63 20.9% 9 357.8 4009.8
EXACT PE 108 0.6% 9 8.3% 2 9.6 20.6
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 188 1.0% 39 20.7% 547 3514.8 6561.4
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 776 4.5% 228 29.4% 14 786.1 2794.3
Single 16,608 95.5% 5,123 30.8% 17 729.8 5285.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 62.2%
LONG 1.6%
FIELDS 1.0%
PERIODICALS 1.6%
COMMENTS 0.0%
Other 31.3%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 6:09
Average session length (minutes:seconds) 13:50
Longest session recorded (minutes:seconds) 374:36
Average number of searches completed per session 2.0
Retrievals per search - median 4.0
Retrievals per search - average 490.2
Retrievals per search - standard deviation 2750.8
Percent of searches completed with 0 results 36.7%
Percent of searches entered that are long 2.2%
Percent of long searches completed
(includes partial results) 58.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 508 24.6%
DISPLAY (excluding automatic displays) 738 35.7%
HELP 60 2.9%
EXPLAIN 69 3.3%
SET/RESET 118 5.7%
SHOW 19 0.9%
ADD ON (AND, OR, AND NOT) 46 2.2%
LOGON or LOGOFF 347 16.8%
COMMENT 0 0.0%
SAVE 45 2.2%
USE 0 0.0%
OTHER 117 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 69 13.2% 42 60.9% 11 313.4 788.6
TITLE WORD 117 22.3% 62 53.0% 12 244.7 886.4
EXACT TITLE 3 0.6% 1 33.3% 2 1.5 0.7
JOURNAL 20 3.8% 17 85.0% 36,047 24128.3 20731.3
EXACT JOURNAL 5 1.0% 1 20.0% 1,377 5163.0 8258.0
SUBJECT 77 14.7% 26 33.8% 81 833.6 2685.8
EXACT SUBJECT 1 0.2% 0 0.0% 6,194 6194.0 0.0
KEYWORD 216 41.2% 58 26.9% 77 647.5 2228.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 1 0.2% 1 100% 0 0.0 0.0
DATE 6 1.1% 2 33.3% 292 311.5 317.1
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 6 1.1% 2 33.3% 12 12.8 3.8
EXACT PE 3 0.6% 0 0.0% 2 2.3 0.6
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 0 0.0% 0 0.0% 0 0.0 0.0
By number of indexes:
Multiple 21 4.2% 17 80.9% 292 311.5 317.1
Single 480 95.8% 176 36.7% 45 871.0 3647.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.0%
SHORT 65.6%
LONG 1.2%
FIELDS 0.6%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 26.5%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 4,584
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 290
displays or when any of these paging options is set.
TEXT included with MAIL commands 930
SET DISPLAY TEXT commands 0
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:31
Average session length (minutes:seconds) 10:49
Longest session recorded (minutes:seconds) 375:55
Average number of searches completed per session 2.4
Retrievals per search - median 2.0
Retrievals per search - average 2332.2
Retrievals per search - standard deviation 41428
Percent of searches completed with 0 results 35.6%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 47.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 1,692 34.6%
DISPLAY (excluding automatic displays) 1,169 23.9%
HELP 207 4.2%
EXPLAIN 151 3.1%
SET/RESET 298 6.1%
SHOW 38 0.8%
ADD ON (AND, OR, AND NOT) 84 1.7%
LOGON or LOGOFF 955 19.5%
COMMENT 0 0.0%
SAVE 66 1.3%
USE 1 0.0%
OTHER 229 4.7%
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 79 4.4% 39 49.4% 13 144.9 339.2
TITLE WORD 538 29.7% 170 31.6% 9 558.6 4051.1
EXACT TITLE 40 2.2% 20 50.0% 6 80.7 165.6
JOURNAL 31 1.7% 12 38.7% 881 185964 362193
EXACT JOURNAL 7 0.4% 1 14.3% 12 137.2 308.7
SUBJECT 544 30.1% 247 45.4% 29 597.2 2554.3
EXACT SUBJECT 16 0.9% 3 18.8% 26 188.3 457.5
KEYWORD 439 24.3% 118 26.9% 18 419.8 2035.4
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 91 5.0% 20 22.0% 13 222.3 910.3
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 6 0.3% 1 16.7% 145 1358.6 2322.1
EXACT PE 8 0.4% 1 12.5% 6 125.1 295.4
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 10 0.6% 0 0.0% 1,706 1184.5 916.1
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 128 7.6% 33 25.8% 16 250.5 859.2
Single 1,548 92.4% 566 36.6% 17 4122.8 55403.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.0%
SHORT 46.2%
LONG 2.7%
FIELDS 2.4%
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 13.2%
Ten most frequent errors:
1. First word of command is invalid 37.1%
2. NS command - no next screen 25.6%
3. FIND command with invalid index name 13.6%
4. PS command - no previous screen 4.5%
5. DISPLAY command contains invalid word 3.0%
6. Search term missing from search command 2.2%
7. Valid command at an inappropriate time 2.1%
8. DISPLAY command - no FIND results 0.9%
9. DISPLAY command-record numbers too large 0.7%
10. MAIL command issued w/o email address 0.6%
11. All others 9.7%
Ten most frequent EXPLAIN requests:
1. GUIDE 28.2%
2. LOCATE (ARTICLE DBS) 17.0%
3. COMMANDS 8.1%
4. FIND 7.8%
5. MAGS DATABASE 6.1%
6. INDEXES 5.8%
7. Unrecognized term 4.4%
8. DISPLAYS (IAC DBS) 3.2%
9. ADDON SEARCH 2.1%
10. DATABASES 2.0%
11. All others 15.4%
Ten most frequent HELP situations:
1. Help requested from SET DB command 26.2%
2. First word of command is invalid 20.2%
3. FIND command with invalid index name 11.9%
4. FIND command with zero results 6.8%
5. DISPLAY command-first of >1 screen 4.7%
6. DISPLAY command-complete in one screen 4.3%
7. DISPLAY command - middle of >1 screen 4.0%
8. NS command - no next screen 3.0%
9. FIND command retrieves >1 book 2.9%
10. PS command - no previous screen 2.0%
11. All others 14.1%
Ten most frequent SHOW requests:
1. HISTORY 39.3%
2. SEARCH 33.2%
3. MAIL STATUS 6.0%
4. GLOSSARY 4.0%
5. SYSTEM NEWS 4.0%
6. SETTINGS (IAC DBS) 3.7%
7. IAC NEWS 3.4%
8. MAIL SETTINGS 2.0%
9. LIBRARY NEWS 1.3%
10. DISPLAY 0.7%
11. All others 2.3%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)