MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 04/14/01 through 04/20/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 106 723 829
Davis 304 31 335
Irvine 211 0 211
Los Angeles 2 260 262
Riverside 25 72 97
San Diego 57 235 292
San Francisco 152 0 152
Santa Barbara 11 136 147
Santa Cruz 43 68 111
LBL 0 116 116
LLL 0 38 38
Los Alamos n/a 0 0
Other - UC 1 68 69
U.S. Forestry 0
Other-Network UC n/a 472 472
_______ ______ _____
912 2,219 3,131
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 64 239 1,764
2-4 a.m. 23 119 1,167
4-6 a.m. 35 153 1,295
6-8 a.m. 91 544 5,663
8-10 a.m. 358 1,267 13,914
10-12 a.m. 557 1,374 13,200
12-2 p.m. 563 1,466 15,522
2-4 p.m. 623 1,643 15,701
4-6 p.m. 437 1,237 12,638
6-8 p.m. 205 656 7,763
8-10 p.m. 102 251 3,786
10-12 p.m. 73 222 1,879
__________ __________ __________ _________________
Total: 3,131 9,171 94,292
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 290 2,126 2,416
Davis 720 75 795
Irvine 652 0 652
Los Angeles 4 787 791
Riverside 39 220 259
San Diego 146 643 789
San Francisco 399 0 399
Santa Barbara 17 434 451
Santa Cruz 84 182 266
LBL 0 368 368
LLL 0 691 691
Los Alamos n/a 0 0
Other - UC 2 184 186
U.S. Forestry 0
Other-Network UC n/a 1,108 1,108
_______ ______ _____
2,353 6,818 9,171
Number of FIND commands by database
CC database 8,847
CCT database 324
Total number of FIND commands 9,171
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 4,059 23,952 28,011
Davis 6,695 389 7,084
Irvine 4,295 0 4,295
Los Angeles 53 7,491 7,544
Riverside 202 1,511 1,713
San Diego 862 5,303 6,165
San Francisco 2,471 0 2,471
Santa Barbara 102 7,459 7,561
Santa Cruz 1,186 2,430 3,616
LBL 0 4,469 4,469
LLL 0 7,050 7,050
Los Alamos n/a 0 0
Other - UC 0 2,226 2,226
U.S. Forestry 0
Other-Network UC n/a 12,087 12,087
_______ ______ _____
19,925 74,367 94,292
Number of Records Displayed by database:
CC database 83,104
CCT database 11,188
Total number of Records Displayed 94,292
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 94.3%
Percent of CCT sessions 5.7%
Percent of searches done in the CC database 96.5%
Percent of searches done in the CCT database 3.5%
1.5 Response time
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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
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 844:55
Average number of searches completed per session 3.0
Retrievals per search - median 9.0
Retrievals per search - average 659.7
Retrievals per search - standard deviation 7669.5
Percent of searches completed with 0 results 24.3%
Percent of searches entered that are long 0.1%
Percent of long searches completed
(includes partial results) 81.8%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,175 37.9%
DISPLAY (excluding automatic displays) 6,116 28.4%
HELP 221 1.0%
EXPLAIN 233 1.1%
SET/RESET 1,186 5.5%
SHOW 36 0.2%
ADD ON (AND, OR, AND NOT) 672 3.1%
LOGON or LOGOFF 3,740 17.3%
COMMENT 3 0.0%
SAVE 188 0.9%
USE 4 0.0%
OTHER 985 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 3,895 41.4% 590 15.1% 31 208.5 1172.3
TITLE WORD 2,792 29.7% 797 28.5% 15 1172.0 8896.8
EXACT TITLE 138 1.5% 63 45.6% 2 29.4 150.2
JOURNAL 408 4.3% 186 45.6% 540 8165.9 36196.8
EXACT JOURNAL 517 5.5% 312 60.3% 53 1344.7 5456.9
SUBJECT CAT 49 0.5% 4 8.2% 11 36.5 71.1
SUBFILE 7 0.1% 1 14.3% 123 1032.2 2290.4
PUBLICATION TYPE 36 0.4% 9 25.0% 11 8111.6 19669.9
LANGUAGE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 82 0.9% 18 21.9% 9 80.6 223.8
ADDED 608 6.5% 450 74.0% 25 41.0 46.3
PERIODICAL 325 3.5% 38 11.7% 5 105.7 869.7
EXACT PE 80 0.9% 10 12.5% 2 11.2 31.8
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 462 4.9% 139 30.1% 16 1232.3 10175.4
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 1,227 15.1% 635 51.8% 9 42.3 249.4
Single 6,924 84.9% 1,338 19.3% 29 1026.7 9612.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.7%
SHORT 79.7%
LONG 4.8%
FIELDS 1.8%
PERIODICALS 8.8%
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) 85:33
Average number of searches completed per session 1.8
Retrievals per search - median 48.0
Retrievals per search - average 343.1
Retrievals per search - standard deviation 1854.7
Percent of searches completed with 0 results 26.2%
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 323 25.5%
DISPLAY (excluding automatic displays) 483 38.1%
HELP 88 6.9%
EXPLAIN 32 2.5%
SET/RESET 108 8.5%
SHOW 14 1.1%
ADD ON (AND, OR, AND NOT) 1 0.1%
LOGON or LOGOFF 173 13.6%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 46 3.6%
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:
JOURNAL 195 60.4% 69 35.4% 112 205.8 287.1
EXACT JOURNAL 93 28.8% 16 17.2% 142 224.7 266.2
SUBJECT CAT 4 1.2% 0 0.0% 16,763 16763.0 0.0
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 31 9.6% 0 0.0% 2 20.4 82.7
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 323 100% 85 26.3% 112 466.0 2151.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
ISSUES 46.3%
SHORT 11.8%
LONG 31.6%
PERIODICALS 7.1%
COMMENTS 0.0%
Other 0.2%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 9.0%
Ten most frequent errors:
1. NS command - no next screen 31.9%
2. First word of command is invalid 28.2%
3. FIND command with invalid index name 10.0%
4. Index invalid in current database 4.5%
5. DISPLAY command - no FIND results 3.5%
6. PS command - no previous screen 2.5%
7. DISPLAY command contains invalid word 1.7%
8. Valid command at an inappropriate time 1.7%
9. Search term missing from search command 1.5%
10. D ABS command in database w/o abstracts 1.3%
11. All others 13.1%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 19.6%
2. FIND (CC DB) 15.1%
3. LOCATE (ARTICLE DBS) 10.2%
4. CC INDEXES 10.2%
5. COMMANDS 5.7%
6. Unrecognized term 3.8%
7. DATABASES 3.4%
8. CC DATABASE 3.0%
9. CCT INDEXES 3.0%
10. CCT DATABASE 2.6%
11. All others 23.4%
Ten most frequent HELP situations:
1. Help requested from START CC command 13.6%
2. First word of command is invalid 12.4%
3. F/BR with index invalid in current DB 11.3%
4. FIND command with invalid index name 9.8%
5. Help requested from SET DB command 6.4%
6. DISPLAY command-first of >1 screen 5.7%
7. DISPLAY command - middle of >1 screen 4.4%
8. FIND command with zero results 4.0%
9. FIND command retrieves >1 book 3.1%
10. DISPLAY command-complete in one screen 2.6%
11. All others 26.7%
Ten most frequent SHOW requests:
1. HISTORY 50.0%
2. SEARCH 10.0%
3. SYSTEM NEWS 8.0%
4. CCT SETTINGS 8.0%
5. MAIL STATUS 6.0%
6. SC LIST (CC DBS) 4.0%
7. DLA BULLETIN 4.0%
8. GLOSSARY 2.0%
9. SYSTEM4 NEWS 2.0%
10. LIBRARY NEWS 2.0%
11. All others 4.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)