MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 01/01/01 through 01/31/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 308 3,387 3,695
Davis 1,708 118 1,826
Irvine 1,229 0 1,229
Los Angeles 130 1,162 1,292
Riverside 190 338 528
San Diego 253 1,212 1,465
San Francisco 828 0 828
Santa Barbara 143 719 862
Santa Cruz 153 417 570
LBL 0 578 578
LLL 0 267 267
Los Alamos n/a 0 0
Other - UC 11 177 188
U.S. Forestry 0
Other-Network UC n/a 2,018 2,018
_______ ______ _____
4,953 10,393 15,346
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 253 831 6,550
2-4 a.m. 186 664 5,094
4-6 a.m. 236 925 9,955
6-8 a.m. 501 2,386 24,072
8-10 a.m. 1,674 4,999 45,945
10-12 a.m. 2,780 7,372 79,088
12-2 p.m. 2,710 7,895 74,583
2-4 p.m. 3,010 8,204 95,646
4-6 p.m. 2,145 5,747 76,247
6-8 p.m. 899 2,569 25,300
8-10 p.m. 598 2,142 19,966
10-12 p.m. 354 1,178 13,286
__________ __________ __________ _________________
Total: 15,346 44,912 475,732
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 779 9,265 10,044
Davis 4,720 358 5,078
Irvine 3,386 0 3,386
Los Angeles 366 3,301 3,667
Riverside 350 1,062 1,412
San Diego 656 3,261 3,917
San Francisco 2,153 0 2,153
Santa Barbara 359 2,340 2,699
Santa Cruz 301 1,374 1,675
LBL 0 1,563 1,563
LLL 0 3,116 3,116
Los Alamos n/a 0 0
Other - UC 25 774 799
U.S. Forestry 0
Other-Network UC n/a 5,403 5,403
_______ ______ _____
13,095 31,817 44,912
Number of FIND commands by database
CC database 43,935
CCT database 977
Total number of FIND commands 44,912
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 8,616 97,803 106,419
Davis 79,090 2,766 81,856
Irvine 26,562 0 26,562
Los Angeles 2,483 32,124 34,607
Riverside 3,005 10,272 13,277
San Diego 6,026 31,428 37,454
San Francisco 17,460 0 17,460
Santa Barbara 2,379 29,216 31,595
Santa Cruz 3,929 13,269 17,198
LBL 0 16,341 16,341
LLL 0 33,319 33,319
Los Alamos n/a 0 0
Other - UC 211 8,488 8,699
U.S. Forestry 0
Other-Network UC n/a 50,945 50,945
_______ ______ _____
149,761 325,971 475,732
Number of Records Displayed by database:
CC database 439,253
CCT database 36,479
Total number of Records Displayed 475,732
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 95.4%
Percent of CCT sessions 4.6%
Percent of searches done in the CC database 97.8%
Percent of searches done in the CCT database 2.2%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.0
Standard deviation in seconds 4.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.2
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 753:00
Average number of searches completed per session 3.0
Retrievals per search - median 10.0
Retrievals per search - average 422.7
Retrievals per search - standard deviation 3843.8
Percent of searches completed with 0 results 24.2%
Percent of searches entered that are long 0.4%
Percent of long searches completed
(includes partial results) 57.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 41,145 37.6%
DISPLAY (excluding automatic displays) 31,957 29.2%
HELP 878 0.8%
EXPLAIN 1,001 0.9%
SET/RESET 5,641 5.2%
SHOW 203 0.2%
ADD ON (AND, OR, AND NOT) 2,790 2.6%
LOGON or LOGOFF 19,098 17.5%
COMMENT 0 0.0%
SAVE 1,499 1.4%
USE 37 0.0%
OTHER 5,068 4.6%
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 21,004 44.5% 3,034 14.4% 31 213.0 1120.6
TITLE WORD 13,425 28.5% 4,014 29.9% 15 669.1 4543.9
EXACT TITLE 309 0.7% 155 50.2% 2 26.6 99.2
JOURNAL 1,896 4.0% 868 45.8% 191 3570.8 11700.2
EXACT JOURNAL 2,567 5.4% 1,637 63.8% 43 1664.8 6150.7
SUBJECT CAT 379 0.8% 54 14.2% 10 83.9 402.4
SUBFILE 69 0.1% 7 10.1% 29 568.1 1552.2
PUBLICATION TYPE 261 0.6% 60 23.0% 13 4179.4 27464.6
LANGUAGE 21 0.0% 1 4.8% 95 376.2 469.2
DATE 590 1.3% 99 16.8% 15 392.8 2014.6
ADDED 2,668 5.7% 1,870 70.1% 20 34.3 42.7
PERIODICAL 1,272 2.7% 205 16.1% 5 101.6 817.7
EXACT PE 339 0.7% 31 9.1% 3 19.3 91.1
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 2,376 5.0% 657 27.6% 20 1142.1 6797.7
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 6,103 14.9% 2,889 47.3% 10 102.4 843.5
Single 34,877 85.1% 6,876 19.7% 31 638.9 4766.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.4%
SHORT 79.3%
LONG 6.1%
FIELDS 2.1%
PERIODICALS 6.5%
COMMENTS 0.0%
Other 1.5%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 100:57
Average number of searches completed per session 1.4
Retrievals per search - median 46.0
Retrievals per search - average 327.5
Retrievals per search - standard deviation 1689.0
Percent of searches completed with 0 results 25.9%
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 964 21.3%
DISPLAY (excluding automatic displays) 1,676 37.1%
HELP 315 7.0%
EXPLAIN 153 3.4%
SET/RESET 420 9.3%
SHOW 54 1.2%
ADD ON (AND, OR, AND NOT) 13 0.3%
LOGON or LOGOFF 720 15.9%
COMMENT 0 0.0%
SAVE 11 0.2%
USE 1 0.0%
OTHER 188 4.2%
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 622 64.0% 174 28.0% 86 498.6 2268.8
EXACT JOURNAL 287 29.5% 65 22.6% 114 302.6 612.9
SUBJECT CAT 5 0.5% 0 0.0% 238 5078.8 7777.5
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 3 0.3% 0 0.0% 4 3.7 2.5
ADDED 5 0.5% 2 40.0% 113 138.7 89.3
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 50 5.1% 8 16.0% 4 94.6 230.8
By number of indexes:
Multiple 8 0.8% 2 25.0% 36 71.2 93.1
Single 956 99.2% 245 25.6% 83 449.4 1966.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.8%
ISSUES 44.2%
SHORT 17.5%
LONG 23.2%
PERIODICALS 4.5%
COMMENTS 0.0%
Other 1.8%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.0%
Ten most frequent errors:
1. NS command - no next screen 33.5%
2. First word of command is invalid 27.1%
3. FIND command with invalid index name 9.3%
4. Index invalid in current database 3.8%
5. DISPLAY command - no FIND results 2.3%
6. Search term missing from search command 2.1%
7. D ABS command in database w/o abstracts 2.0%
8. PS command - no previous screen 1.9%
9. DISPLAY command contains invalid word 1.9%
10. Valid command at an inappropriate time 1.8%
11. All others 14.1%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 13.5%
2. FIND (CC DB) 11.2%
3. CC INDEXES 10.0%
4. COMMANDS 7.2%
5. LOCATE (ARTICLE DBS) 5.4%
6. Unrecognized term 4.1%
7. CC DATABASE 3.7%
8. DISPLAY 3.4%
9. DATABASES 3.0%
10. MAIL 2.7%
11. All others 35.9%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.6%
2. First word of command is invalid 13.2%
3. FIND command with invalid index name 7.1%
4. Help requested from SET DB command 6.6%
5. F/BR with index invalid in current DB 6.5%
6. DISPLAY command - middle of >1 screen 5.4%
7. DISPLAY command-first of >1 screen 5.1%
8. FIND command with zero results 4.2%
9. NS command - no next screen 3.7%
10. FIND command retrieves >1 book 3.7%
11. All others 29.1%
Ten most frequent SHOW requests:
1. HISTORY 39.3%
2. SEARCH 13.5%
3. MAIL STATUS 10.2%
4. SYSTEM NEWS 6.1%
5. SC LIST (CC DBS) 6.1%
6. CC SETTINGS 4.9%
7. CC NEWS 4.1%
8. CC GLOSSARY 3.7%
9. LIBRARY NEWS 1.6%
10. UPDATE 1.2%
11. All others 9.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)