MELVYL IAC DATABASES TELNET STATISTICS
Time period: 06/01/00 through 06/30/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 603 1,541 2,144
Davis 1,000 42 1,042
Irvine 1,027 0 1,027
Los Angeles 99 629 728
Riverside 523 114 637
San Diego 233 192 425
San Francisco 422 0 422
Santa Barbara 375 402 777
Santa Cruz 365 134 499
LBL 0 63 63
LLL 0 26 26
Los Alamos n/a 5 5
Other - UC 18 149 167
Stanford 226
Other-Network UC n/a 627 627
_______ ______ _____
4,665 3,924 8,815
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 159 581 8,817
2-4 a.m. 52 148 1,443
4-6 a.m. 33 134 2,633
6-8 a.m. 110 312 3,548
8-10 a.m. 746 1,983 20,077
10-12 a.m. 1,432 4,138 47,581
12-2 p.m. 1,703 5,089 65,020
2-4 p.m. 1,937 5,859 59,251
4-6 p.m. 1,316 4,195 48,206
6-8 p.m. 577 1,955 25,974
8-10 p.m. 461 1,652 18,043
10-12 p.m. 289 1,018 13,748
__________ __________ __________ _________________
Total: 8,815 27,064 314,341
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,591 3,925 5,516
Davis 2,984 127 3,111
Irvine 3,318 0 3,318
Los Angeles 363 1,885 2,248
Riverside 1,773 368 2,141
San Diego 835 604 1,439
San Francisco 1,195 0 1,195
Santa Barbara 1,295 1,247 2,542
Santa Cruz 1,224 446 1,670
LBL 0 118 118
LLL 0 57 57
Los Alamos n/a 11 11
Other - UC 36 471 507
Stanford 703
Other-Network UC n/a 2,488 2,488
_______ ______ _____
14,614 11,747 27,064
Number of FIND commands by database
MAGS database 23,780
NEWS database 2,302
COMP database 982
Total number of FIND commands 27,064
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 14,375 46,129 60,504
Davis 32,904 1,057 33,961
Irvine 29,284 0 29,284
Los Angeles 4,830 22,639 27,469
Riverside 19,610 4,623 24,233
San Diego 9,091 7,021 16,112
San Francisco 20,951 0 20,951
Santa Barbara 15,485 13,139 28,624
Santa Cruz 10,676 4,888 15,564
LBL 0 1,524 1,524
LLL 0 1,006 1,006
Los Alamos n/a 127 127
Other - UC 531 5,941 6,472
Stanford 1,223
Other-Network UC n/a 36,779 36,779
_______ ______ _____
157,737 144,873 303,833
Number of Records Displayed by database:
MAGS database 284,156
NEWS database 17,500
COMP database 12,685
Total number of Records Displayed 303,833
1.4 Relative Use of Databases
______________________________
Relative use of MAGS, NEWS, & COMP databases:
Percent of MAGS sessions 85.0%
Percent of NEWS sessions 10.7%
Percent of COMP sessions 4.3%
Percent of searches done in the MAGS database 87.9%
Percent of searches done in the NEWS database 8.5%
Percent of searches done in the COMP database 3.6%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
Standard deviation in seconds 6.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 6.7
2.0 Magazines & Journals Database Statistics
_____________________________________________
Median session length (minutes:seconds) 6:43
Average session length (minutes:seconds) 12:17
Longest session recorded (minutes:seconds) 335:27
Average number of searches completed per session 3.1
Retrievals per search - median 6.0
Retrievals per search - average 581.8
Retrievals per search - standard deviation 6736.5
Percent of searches completed with 0 results 28.8%
Percent of searches entered that are long 1.3%
Percent of long searches completed
(includes partial results) 53.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 22,164 26.9%
DISPLAY (excluding automatic displays) 35,012 42.6%
HELP 2,157 2.6%
EXPLAIN 1,447 1.8%
SET/RESET 2,503 3.0%
SHOW 400 0.5%
ADD ON (AND, OR, AND NOT) 1,616 2.0%
LOGON or LOGOFF 10,454 12.7%
COMMENT 0 0.0%
SAVE 1,614 2.0%
USE 10 0.0%
OTHER 4,902 6.0%
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 4,147 17.9% 1,231 29.7% 9 66.2 282.5
TITLE WORD 4,646 20.1% 1,344 28.9% 11 416.3 2510.4
EXACT TITLE 614 2.7% 273 44.5% 3 61.4 319.0
JOURNAL 1,297 5.6% 648 50.0% 623 3692.6 9273.3
EXACT JOURNAL 639 2.8% 245 38.3% 1,037 5580.9 10796.6
SUBJECT 4,406 19.0% 1,601 36.3% 33 577.7 14521.2
EXACT SUBJECT 194 0.8% 86 44.3% 111 370.3 765.9
KEYWORD 5,977 25.8% 1,128 18.9% 31 930.8 7904.0
SUBFILE 12 0.1% 1 8.3% 88 80.2 71.4
PUBLICATION TYPE 49 0.2% 9 18.4% 6 367.2 1582.5
DATE 280 1.2% 61 21.8% 20 221.0 803.9
ADDED 17 0.1% 2 11.8% 38,957 28173.7 19438.2
PERIODICAL 493 2.1% 79 16.0% 9 127.5 737.3
EXACT PE 202 0.9% 38 18.8% 4 113.4 1215.4
RPE 1 0.0% 0 0.0% 195 195.0 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 194 0.8% 32 16.5% 960 3894.4 7320.9
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 1,120 5.1% 355 31.7% 15 533.9 2091.0
Single 20,871 94.9% 6,048 29.0% 20 858.1 8434.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.3%
SHORT 64.1%
LONG 2.1%
FIELDS 0.9%
PERIODICALS 1.7%
COMMENTS 0.0%
Other 28.8%
2.1 Computer Articles Database Statistics
__________________________________________
Median session length (minutes:seconds) 4:16
Average session length (minutes:seconds) 9:42
Longest session recorded (minutes:seconds) 92:04
Average number of searches completed per session 2.6
Retrievals per search - median 5.0
Retrievals per search - average 907.0
Retrievals per search - standard deviation 6673.7
Percent of searches completed with 0 results 34.7%
Percent of searches entered that are long 3.4%
Percent of long searches completed
(includes partial results) 78.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 883 24.8%
DISPLAY (excluding automatic displays) 1,352 37.9%
HELP 116 3.3%
EXPLAIN 109 3.1%
SET/RESET 124 3.5%
SHOW 15 0.4%
ADD ON (AND, OR, AND NOT) 99 2.8%
LOGON or LOGOFF 537 15.1%
COMMENT 0 0.0%
SAVE 136 3.8%
USE 0 0.0%
OTHER 195 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 113 12.1% 70 61.9% 4 18.4 38.4
TITLE WORD 210 22.4% 70 33.3% 23 929.4 4632.2
EXACT TITLE 9 1.0% 6 66.7% 2 1.7 0.6
JOURNAL 82 8.8% 59 71.9% 1,881 11973.3 33683.0
EXACT JOURNAL 16 1.7% 10 62.5% 3,222 7884.3 13548.6
SUBJECT 158 16.9% 48 30.4% 43 606.7 1570.1
EXACT SUBJECT 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 304 32.4% 58 19.1% 61 1480.0 6659.7
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 6 0.6% 1 16.7% 3 5.4 3.3
DATE 28 3.0% 4 14.3% 9 31.6 42.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 9 1.0% 1 11.1% 32 95.6 192.4
EXACT PE 1 0.1% 0 0.0% 1 1.0 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 0.1% 0 0.0% 2,933 2933.0 0.0
By number of indexes:
Multiple 55 6.3% 18 32.7% 9 516.6 2390.0
Single 822 93.7% 290 35.3% 46 1599.0 8955.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.3%
SHORT 63.6%
LONG 0.4%
FIELDS 2.5%
PERIODICALS 0.5%
COMMENTS 0.0%
Other 27.9%
2.1.1 Article Text
___________________
DISPLAY TEXT commands 7,437
TEXT included with CONTINUOUS, PRINT, CAPTURE, or SLOW 236
displays or when any of these paging options is set.
TEXT included with MAIL commands 1,723
SET DISPLAY TEXT commands 1
2.2 Newspaper Articles Database Statistics
___________________________________________
Median session length (minutes:seconds) 4:22
Average session length (minutes:seconds) 9:07
Longest session recorded (minutes:seconds) 410:42
Average number of searches completed per session 2.4
Retrievals per search - median 2.5
Retrievals per search - average 5980.0
Retrievals per search - standard deviation 79781
Percent of searches completed with 0 results 38.0%
Percent of searches entered that are long 1.5%
Percent of long searches completed
(includes partial results) 58.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 2,140 34.2%
DISPLAY (excluding automatic displays) 1,497 24.0%
HELP 252 4.0%
EXPLAIN 180 2.9%
SET/RESET 382 6.1%
SHOW 37 0.6%
ADD ON (AND, OR, AND NOT) 162 2.6%
LOGON or LOGOFF 1,223 19.6%
COMMENT 0 0.0%
SAVE 46 0.7%
USE 0 0.0%
OTHER 330 5.3%
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 146 6.5% 67 45.9% 13 316.3 642.1
TITLE WORD 555 24.8% 181 32.6% 21 390.0 1785.7
EXACT TITLE 60 2.7% 25 41.7% 1 11.0 44.1
JOURNAL 31 1.4% 12 38.7% 817304 674295 574416
EXACT JOURNAL 17 0.8% 9 52.9% 825 3086.4 4570.6
SUBJECT 687 30.7% 312 45.4% 40 772.8 2389.1
EXACT SUBJECT 19 0.8% 10 52.6% 23 165.4 313.0
KEYWORD 625 27.9% 200 32.0% 18 676.3 3327.6
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
PUBLICATION TYPE 8 0.4% 4 50.0% 21 24.8 27.6
DATE 50 2.2% 16 32.0% 28 89.2 158.7
ADDED 3 0.1% 1 33.3% 5 5.0 0.0
PERIODICAL 18 0.8% 3 16.7% 33 127.3 215.7
EXACT PE 9 0.4% 3 33.3% 13 28.5 33.0
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 9 0.4% 0 0.0% 85 74.4 44.7
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 112 5.3% 38 33.9% 28 390.0 1705.7
Single 2,006 94.7% 765 38.1% 22 10905.9 107908
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.8%
SHORT 45.0%
LONG 3.6%
FIELDS 1.1%
PERIODICALS 1.1%
COMMENTS 0.0%
Other 43.4%
2.3 Error, EXPLAIN and HELP statistics (MAGS, COMP, & NEWS)
_______________________________________ ____________________
Percent of commands that contained errors 12.2%
Ten most frequent errors:
1. First word of command is invalid 34.2%
2. NS command - no next screen 26.7%
3. FIND command with invalid index name 12.0%
4. PS command - no previous screen 4.1%
5. DISPLAY command contains invalid word 3.9%
6. Search term missing from search command 2.3%
7. Valid command at an inappropriate time 1.9%
8. MAIL command issued w/o email address 1.2%
9. DISPLAY command - no FIND results 1.1%
10. DISPLAY command-record numbers too large 1.0%
11. All others 11.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 25.4%
2. LOCATE (ARTICLE DBS) 13.0%
3. FIND 10.1%
4. COMMANDS 8.1%
5. INDEXES 8.1%
6. Unrecognized term 5.8%
7. MAGS DATABASE 4.4%
8. DISPLAYS (IAC DBS) 3.1%
9. ADDON SEARCH 2.7%
10. MAIL 2.2%
11. All others 17.0%
Ten most frequent HELP situations:
1. Help requested from SET DB command 24.1%
2. First word of command is invalid 18.7%
3. FIND command with invalid index name 11.7%
4. FIND command with zero results 7.1%
5. DISPLAY command - middle of >1 screen 5.6%
6. DISPLAY command-complete in one screen 4.3%
7. DISPLAY command-first of >1 screen 4.0%
8. FIND command retrieves >1 book 3.4%
9. NS command - no next screen 2.8%
10. PS command - no previous screen 1.7%
11. All others 16.7%
Ten most frequent SHOW requests:
1. SEARCH 37.9%
2. HISTORY 27.6%
3. MAIL STATUS 15.0%
4. GLOSSARY 4.7%
5. MAIL SETTINGS 3.0%
6. IAC NEWS 2.3%
7. SYSTEM NEWS 2.3%
8. SETTINGS (IAC DBS) 1.6%
9. IAC LOADING STATISTICS 0.7%
10. LIBRARY NEWS 0.5%
11. All others 4.2%
IACmm/dd iac MELVYL IAC DATABASES TELNET STATISTICS (weekly)