MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 07/01/00 through 07/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 474 3,156 3,630
Davis 1,544 110 1,654
Irvine 1,342 0 1,342
Los Angeles 325 1,404 1,729
Riverside 252 370 622
San Diego 213 1,096 1,309
San Francisco 1,216 0 1,216
Santa Barbara 183 1,019 1,202
Santa Cruz 138 421 559
LBL 0 559 559
LLL 0 308 308
Los Alamos n/a 0 0
Other - UC 6 151 157
U.S. Forestry 0
Other-Network UC n/a 1,753 1,753
_______ ______ _____
5,693 10,347 16,040
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 306 1,407 15,788
2-4 a.m. 179 915 7,670
4-6 a.m. 203 795 6,902
6-8 a.m. 464 2,910 26,726
8-10 a.m. 1,623 5,316 46,688
10-12 a.m. 2,981 8,071 82,978
12-2 p.m. 2,702 7,956 72,642
2-4 p.m. 3,381 9,662 89,727
4-6 p.m. 2,443 6,694 64,861
6-8 p.m. 861 2,726 33,031
8-10 p.m. 472 1,526 15,979
10-12 p.m. 425 1,556 12,768
__________ __________ __________ _________________
Total: 16,040 49,534 475,760
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,366 9,244 10,610
Davis 4,832 297 5,129
Irvine 4,028 0 4,028
Los Angeles 899 4,425 5,324
Riverside 680 1,079 1,759
San Diego 528 2,858 3,386
San Francisco 3,057 0 3,057
Santa Barbara 826 3,190 4,016
Santa Cruz 344 1,227 1,571
LBL 0 1,722 1,722
LLL 0 3,357 3,357
Los Alamos n/a 0 0
Other - UC 11 468 479
U.S. Forestry 0
Other-Network UC n/a 5,096 5,096
_______ ______ _____
16,571 32,963 49,534
Number of FIND commands by database
CC database 48,634
CCT database 900
Total number of FIND commands 49,534
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 13,946 99,307 113,253
Davis 46,724 2,601 49,325
Irvine 32,645 0 32,645
Los Angeles 4,530 41,625 46,155
Riverside 4,686 10,645 15,331
San Diego 3,152 24,703 27,855
San Francisco 29,678 0 29,678
Santa Barbara 5,791 44,005 49,796
Santa Cruz 3,015 13,818 16,833
LBL 0 18,111 18,111
LLL 0 30,480 30,480
Los Alamos n/a 0 0
Other - UC 170 4,682 4,852
U.S. Forestry 0
Other-Network UC n/a 41,446 41,446
_______ ______ _____
144,337 331,423 475,760
Number of Records Displayed by database:
CC database 442,895
CCT database 32,865
Total number of Records Displayed 475,760
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 95.7%
Percent of CCT sessions 4.3%
Percent of searches done in the CC database 98.2%
Percent of searches done in the CCT database 1.8%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.3
Standard deviation in seconds 6.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 6.3
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 449:03
Average number of searches completed per session 3.2
Retrievals per search - median 10.0
Retrievals per search - average 467.7
Retrievals per search - standard deviation 4779.0
Percent of searches completed with 0 results 23.8%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 42.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 45,180 38.0%
DISPLAY (excluding automatic displays) 33,929 28.5%
HELP 1,075 0.9%
EXPLAIN 1,241 1.0%
SET/RESET 5,690 4.8%
SHOW 197 0.2%
ADD ON (AND, OR, AND NOT) 3,454 2.9%
LOGON or LOGOFF 20,262 17.0%
COMMENT 0 0.0%
SAVE 2,098 1.8%
USE 51 0.0%
OTHER 5,739 4.8%
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 22,734 44.1% 3,171 13.9% 32 207.4 1195.7
TITLE WORD 14,768 28.6% 4,134 28.0% 16 729.5 4713.0
EXACT TITLE 326 0.6% 163 50.0% 2 21.9 89.3
JOURNAL 2,542 4.9% 1,101 43.3% 331 4804.5 21925.0
EXACT JOURNAL 2,581 5.0% 1,685 65.3% 46 1931.4 6736.7
SUBJECT CAT 346 0.7% 46 13.3% 10 380.1 2829.7
SUBFILE 187 0.4% 27 14.4% 36 285.4 1002.5
PUBLICATION TYPE 228 0.4% 41 18.0% 14 2166.9 9905.1
LANGUAGE 29 0.1% 8 27.6% 17 193.7 550.4
DATE 818 1.6% 107 13.1% 7 195.1 2331.3
ADDED 2,588 5.0% 1,919 74.1% 21 34.6 39.3
PERIODICAL 1,433 2.8% 279 19.5% 4 145.0 920.5
EXACT PE 362 0.7% 46 12.7% 3 23.0 102.0
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 2,644 5.1% 792 30.0% 22 613.9 4701.1
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 6,491 14.4% 2,950 45.4% 8 137.5 1841.4
Single 38,480 85.6% 7,574 19.7% 33 696.9 5881.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.4%
SHORT 81.9%
LONG 4.9%
FIELDS 1.5%
PERIODICALS 6.3%
COMMENTS 0.0%
Other 1.9%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 166:24
Average number of searches completed per session 1.3
Retrievals per search - median 52.0
Retrievals per search - average 267.3
Retrievals per search - standard deviation 1056.4
Percent of searches completed with 0 results 27.9%
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 896 21.6%
DISPLAY (excluding automatic displays) 1,634 39.3%
HELP 263 6.3%
EXPLAIN 132 3.2%
SET/RESET 445 10.7%
SHOW 40 1.0%
ADD ON (AND, OR, AND NOT) 4 0.1%
LOGON or LOGOFF 590 14.2%
COMMENT 0 0.0%
SAVE 13 0.3%
USE 0 0.0%
OTHER 136 3.3%
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:
JOURNAL 625 68.5% 185 29.6% 125 426.1 1418.4
EXACT JOURNAL 214 23.5% 58 27.1% 80 210.1 295.0
SUBJECT CAT 5 0.5% 0 0.0% 278 1634.6 2053.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 13 1.4% 7 53.8% 2 1.7 0.8
ADDED 3 0.3% 0 0.0% 141 165.3 102.7
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 52 5.7% 7 13.5% 9 267.7 1072.5
By number of indexes:
Multiple 16 1.8% 7 43.8% 2 56.2 96.6
Single 880 98.2% 243 27.6% 114 376.8 1239.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.6%
ISSUES 43.4%
SHORT 21.9%
LONG 21.7%
PERIODICALS 4.1%
COMMENTS 0.0%
Other 1.4%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. NS command - no next screen 33.4%
2. First word of command is invalid 28.8%
3. FIND command with invalid index name 10.1%
4. Index invalid in current database 4.2%
5. Search term missing from search command 2.0%
6. DISPLAY command contains invalid word 2.0%
7. D ABS command in database w/o abstracts 1.9%
8. DISPLAY command - no FIND results 1.8%
9. PS command - no previous screen 1.7%
10. Valid command at an inappropriate time 1.2%
11. All others 12.8%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 14.9%
2. FIND (CC DB) 13.2%
3. CC INDEXES 11.4%
4. LOCATE (ARTICLE DBS) 5.8%
5. COMMANDS 5.8%
6. Unrecognized term 4.1%
7. MAIL 3.6%
8. CC DATABASE 3.5%
9. ADD-ON SEARCH 3.0%
10. DISPLAY 2.9%
11. All others 32.0%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.5%
2. First word of command is invalid 13.1%
3. F/BR with index invalid in current DB 7.9%
4. FIND command with invalid index name 7.2%
5. Help requested from SET DB command 6.7%
6. DISPLAY command - middle of >1 screen 6.0%
7. DISPLAY command-first of >1 screen 5.3%
8. FIND command with zero results 4.4%
9. FIND command retrieves >1 book 3.6%
10. DISPLAY command-complete in one screen 2.5%
11. All others 27.7%
Ten most frequent SHOW requests:
1. HISTORY 48.1%
2. MAIL STATUS 8.2%
3. SYSTEM NEWS 7.3%
4. SEARCH 6.0%
5. CC GLOSSARY 5.2%
6. SC LIST (CC DBS) 5.2%
7. MAIL SETTINGS 3.4%
8. LIBRARY NEWS 2.1%
9. CC NEWS 2.1%
10. CCT SETTINGS 1.3%
11. All others 11.2%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)