MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 06/16/01 through 06/22/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 38 548 586
Davis 271 18 289
Irvine 183 0 183
Los Angeles 0 253 253
Riverside 18 49 67
San Diego 30 213 243
San Francisco 185 0 185
Santa Barbara 7 108 115
Santa Cruz 19 64 83
LBL 0 75 75
LLL 0 39 39
Los Alamos n/a 0 0
Other - UC 1 29 30
U.S. Forestry 0
Other-Network UC n/a 562 562
_______ ______ _____
752 1,958 2,710
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 56 407 3,320
2-4 a.m. 33 249 1,904
4-6 a.m. 28 186 1,277
6-8 a.m. 98 709 7,235
8-10 a.m. 307 1,046 9,989
10-12 a.m. 553 1,533 15,089
12-2 p.m. 408 1,166 8,904
2-4 p.m. 533 1,441 14,913
4-6 p.m. 326 1,050 8,886
6-8 p.m. 143 441 3,846
8-10 p.m. 103 450 3,300
10-12 p.m. 122 474 3,331
__________ __________ __________ _________________
Total: 2,710 9,152 81,994
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 115 1,615 1,730
Davis 959 41 1,000
Irvine 676 0 676
Los Angeles 0 737 737
Riverside 47 233 280
San Diego 135 579 714
San Francisco 539 0 539
Santa Barbara 24 315 339
Santa Cruz 31 272 303
LBL 0 243 243
LLL 0 647 647
Los Alamos n/a 0 0
Other - UC 1 73 74
U.S. Forestry 0
Other-Network UC n/a 1,870 1,870
_______ ______ _____
2,527 6,625 9,152
Number of FIND commands by database
CC database 9,040
CCT database 112
Total number of FIND commands 9,152
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 774 18,277 19,051
Davis 7,976 129 8,105
Irvine 5,023 0 5,023
Los Angeles 0 8,394 8,394
Riverside 627 1,270 1,897
San Diego 1,401 4,131 5,532
San Francisco 5,651 0 5,651
Santa Barbara 110 3,801 3,911
Santa Cruz 481 2,372 2,853
LBL 0 1,942 1,942
LLL 0 6,615 6,615
Los Alamos n/a 0 0
Other - UC 3 652 655
U.S. Forestry 0
Other-Network UC n/a 12,365 12,365
_______ ______ _____
22,046 59,948 81,994
Number of Records Displayed by database:
CC database 76,126
CCT database 5,868
Total number of Records Displayed 81,994
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.6%
Percent of CCT sessions 3.4%
Percent of searches done in the CC database 98.8%
Percent of searches done in the CCT database 1.2%
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 4.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.4
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 497:42
Average number of searches completed per session 3.4
Retrievals per search - median 8.0
Retrievals per search - average 606.9
Retrievals per search - standard deviation 7752.8
Percent of searches completed with 0 results 25.3%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 70.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,108 38.4%
DISPLAY (excluding automatic displays) 6,328 29.9%
HELP 130 0.6%
EXPLAIN 124 0.6%
SET/RESET 1,062 5.0%
SHOW 21 0.1%
ADD ON (AND, OR, AND NOT) 932 4.4%
LOGON or LOGOFF 3,240 15.3%
COMMENT 0 0.0%
SAVE 357 1.7%
USE 7 0.0%
OTHER 828 3.9%
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 3,865 41.8% 575 14.9% 34 319.4 2048.9
TITLE WORD 2,357 25.5% 707 30.0% 14 1366.7 15508.4
EXACT TITLE 114 1.2% 54 47.4% 3 303.1 1308.1
JOURNAL 417 4.5% 195 46.8% 405 4170.9 10178.8
EXACT JOURNAL 463 5.0% 296 63.9% 40 1048.0 4736.1
SUBJECT CAT 46 0.5% 7 15.2% 7 42.3 110.2
SUBFILE 4 0.0% 0 0.0% 5,794 8389.3 9451.1
PUBLICATION TYPE 30 0.3% 2 6.7% 10 8731.6 44539.0
LANGUAGE 2 0.0% 0 0.0% 652 651.5 163.3
DATE 113 1.2% 20 17.7% 15 134.1 420.1
ADDED 629 6.8% 430 68.4% 17 28.9 32.8
PERIODICAL 608 6.6% 96 15.8% 4 55.9 392.4
EXACT PE 171 1.8% 19 11.1% 4 34.0 197.0
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 425 4.6% 119 28.0% 20 2040.5 11369.7
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 1,155 14.3% 581 50.3% 10 117.3 1030.6
Single 6,923 85.7% 1,351 19.5% 29 941.8 9804.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.0%
SHORT 71.0%
LONG 5.5%
FIELDS 2.7%
PERIODICALS 13.6%
COMMENTS 0.0%
Other 1.2%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 89:11
Average number of searches completed per session 1.2
Retrievals per search - median 100.5
Retrievals per search - average 569.4
Retrievals per search - standard deviation 2140.3
Percent of searches completed with 0 results 24.1%
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 112 20.5%
DISPLAY (excluding automatic displays) 222 40.7%
HELP 23 4.2%
EXPLAIN 9 1.7%
SET/RESET 64 11.7%
SHOW 6 1.1%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 74 13.6%
COMMENT 0 0.0%
SAVE 21 3.9%
USE 2 0.4%
OTHER 12 2.2%
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 80 71.4% 26 32.5% 146 292.2 378.2
EXACT JOURNAL 16 14.3% 1 6.3% 125 212.7 168.6
SUBJECT CAT 6 5.4% 0 0.0% 5,691 7443.3 6310.3
SUBFILE 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 10 8.9% 0 0.0% 10 14.6 15.2
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 112 100% 27 24.1% 140 750.3 2432.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 7.2%
ISSUES 47.2%
SHORT 17.0%
LONG 17.0%
PERIODICALS 7.5%
COMMENTS 0.0%
Other 4.2%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.5%
Ten most frequent errors:
1. NS command - no next screen 31.7%
2. First word of command is invalid 26.0%
3. FIND command with invalid index name 9.1%
4. Max. # of ports to a Z39 db are in use 3.8%
5. Index invalid in current database 3.3%
6. DISPLAY command contains invalid word 3.0%
7. PS command - no previous screen 2.5%
8. Search term missing from search command 2.0%
9. DISPLAY command - no FIND results 1.7%
10. Valid command at an inappropriate time 1.5%
11. All others 15.5%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 17.3%
2. FIND (CC DB) 15.0%
3. CC INDEXES 9.0%
4. LOCATE (ARTICLE DBS) 6.8%
5. DATABASES 6.0%
6. DISPLAY 5.3%
7. COMMANDS 4.5%
8. Unrecognized term 3.8%
9. CC DATABASE 3.8%
10. CCT INDEXES 3.0%
11. All others 25.6%
Ten most frequent HELP situations:
1. Help requested from START CC command 16.4%
2. First word of command is invalid 10.8%
3. FIND command with invalid index name 9.8%
4. Help requested from SET DB command 8.7%
5. DISPLAY command-first of >1 screen 4.9%
6. F/BR with index invalid in current DB 4.5%
7. FIND command retrieves >1 book 4.2%
8. DISPLAY command - last of >1 screen 3.5%
9. FIND command with zero results 3.1%
10. DISPLAY command contains invalid word 2.4%
11. All others 31.5%
Ten most frequent SHOW requests:
1. HISTORY 42.3%
2. CC GLOSSARY 15.4%
3. MAIL SETTINGS 11.5%
4. SC LIST (CC DBS) 7.7%
5. SYSTEM NEWS 3.8%
6. PE LOADING STATISTICS 3.8%
7. DISPLAY (CC DB) 3.8%
8. CC NEWS 3.8%
9. SEARCH 3.8%
10. DATABASES 3.8%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)