MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 08/01/00 through 08/31/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 379 2,797 3,176
Davis 1,572 178 1,750
Irvine 1,374 0 1,374
Los Angeles 415 1,406 1,821
Riverside 241 408 649
San Diego 316 1,166 1,482
San Francisco 1,364 0 1,364
Santa Barbara 128 736 864
Santa Cruz 141 423 564
LBL 0 593 593
LLL 0 385 385
Los Alamos n/a 0 0
Other - UC 34 159 193
U.S. Forestry 0
Other-Network UC n/a 1,497 1,497
_______ ______ _____
5,964 9,748 15,712
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 257 773 7,952
2-4 a.m. 181 739 7,898
4-6 a.m. 154 620 6,901
6-8 a.m. 377 2,243 20,184
8-10 a.m. 1,605 5,043 48,188
10-12 a.m. 2,813 8,396 71,141
12-2 p.m. 2,568 7,139 65,200
2-4 p.m. 3,253 8,987 82,657
4-6 p.m. 2,509 7,484 63,894
6-8 p.m. 933 2,864 27,185
8-10 p.m. 610 2,423 18,158
10-12 p.m. 452 1,992 15,235
__________ __________ __________ _________________
Total: 15,712 48,703 434,593
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,088 8,026 9,114
Davis 5,332 641 5,973
Irvine 4,882 0 4,882
Los Angeles 1,069 4,256 5,325
Riverside 598 1,387 1,985
San Diego 850 3,204 4,054
San Francisco 3,648 0 3,648
Santa Barbara 395 2,341 2,736
Santa Cruz 370 1,169 1,539
LBL 0 1,834 1,834
LLL 0 3,045 3,045
Los Alamos n/a 0 0
Other - UC 87 383 470
U.S. Forestry 0
Other-Network UC n/a 4,098 4,098
_______ ______ _____
18,319 30,384 48,703
Number of FIND commands by database
CC database 47,775
CCT database 928
Total number of FIND commands 48,703
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 11,806 88,451 100,257
Davis 46,809 4,009 50,818
Irvine 29,746 0 29,746
Los Angeles 7,862 40,737 48,599
Riverside 3,682 12,793 16,475
San Diego 6,554 28,833 35,387
San Francisco 26,991 0 26,991
Santa Barbara 3,936 25,545 29,481
Santa Cruz 2,435 10,287 12,722
LBL 0 18,573 18,573
LLL 0 31,563 31,563
Los Alamos n/a 0 0
Other - UC 836 4,888 5,724
U.S. Forestry 0
Other-Network UC n/a 28,257 28,257
_______ ______ _____
140,657 293,936 434,593
Number of Records Displayed by database:
CC database 401,093
CCT database 33,500
Total number of Records Displayed 434,593
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 96.0%
Percent of CCT sessions 4.0%
Percent of searches done in the CC database 98.1%
Percent of searches done in the CCT database 1.9%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 3.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.2
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) 821:47
Average number of searches completed per session 3.2
Retrievals per search - median 10.0
Retrievals per search - average 503.1
Retrievals per search - standard deviation 6171.0
Percent of searches completed with 0 results 23.3%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 50.4%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 43,694 37.9%
DISPLAY (excluding automatic displays) 32,828 28.5%
HELP 912 0.8%
EXPLAIN 1,046 0.9%
SET/RESET 5,731 5.0%
SHOW 147 0.1%
ADD ON (AND, OR, AND NOT) 4,081 3.5%
LOGON or LOGOFF 19,497 16.9%
COMMENT 0 0.0%
SAVE 1,750 1.5%
USE 31 0.0%
OTHER 5,432 4.7%
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 22,320 45.3% 3,047 13.7% 31 246.0 4620.4
TITLE WORD 14,123 28.7% 4,081 28.9% 15 923.6 7867.2
EXACT TITLE 396 0.8% 197 49.7% 2 240.5 1995.5
JOURNAL 2,185 4.4% 933 42.7% 435 4684.3 27557.5
EXACT JOURNAL 2,248 4.6% 1,394 62.0% 72 1860.6 6138.3
SUBJECT CAT 273 0.6% 45 16.5% 9 82.7 587.1
SUBFILE 123 0.2% 13 10.6% 23 332.5 1226.4
PUBLICATION TYPE 344 0.7% 51 14.8% 13 136.2 403.1
LANGUAGE 150 0.3% 23 15.3% 14 130.4 413.5
DATE 675 1.4% 96 14.2% 9 184.9 797.6
ADDED 1,989 4.0% 1,434 72.1% 23 36.8 41.0
PERIODICAL 1,391 2.8% 236 17.0% 6 152.7 1162.2
EXACT PE 439 0.9% 78 17.8% 3 33.0 165.8
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 2,620 5.3% 797 30.4% 21 1230.3 7529.1
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 5,535 12.7% 2,436 44.0% 8 284.7 11223.4
Single 38,019 87.3% 7,508 19.7% 32 734.5 6693.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.2%
SHORT 80.1%
LONG 5.4%
FIELDS 1.4%
PERIODICALS 6.8%
COMMENTS 0.0%
Other 2.1%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 554:19
Average number of searches completed per session 1.5
Retrievals per search - median 53.5
Retrievals per search - average 314.8
Retrievals per search - standard deviation 1449.2
Percent of searches completed with 0 results 27.4%
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 920 24.2%
DISPLAY (excluding automatic displays) 1,417 37.3%
HELP 193 5.1%
EXPLAIN 146 3.8%
SET/RESET 431 11.3%
SHOW 29 0.8%
ADD ON (AND, OR, AND NOT) 8 0.2%
LOGON or LOGOFF 529 13.9%
COMMENT 0 0.0%
SAVE 2 0.1%
USE 0 0.0%
OTHER 123 3.2%
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 562 60.8% 174 31.0% 110 544.8 2101.1
EXACT JOURNAL 309 33.4% 73 23.6% 133 273.7 406.9
SUBJECT CAT 1 0.1% 0 0.0% 1,468 1468.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 5 0.5% 0 0.0% 2 41.8 63.7
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 48 5.2% 4 8.3% 6 321.4 1878.1
By number of indexes:
Multiple 5 0.5% 0 0.0% 2 41.8 63.7
Single 915 99.5% 251 27.4% 113 438.8 1697.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.2%
ISSUES 48.9%
SHORT 15.8%
LONG 25.0%
PERIODICALS 3.9%
COMMENTS 0.0%
Other 1.2%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.2%
Ten most frequent errors:
1. NS command - no next screen 34.9%
2. First word of command is invalid 28.0%
3. FIND command with invalid index name 9.0%
4. Index invalid in current database 4.4%
5. DISPLAY command contains invalid word 2.1%
6. Search term missing from search command 2.0%
7. D ABS command in database w/o abstracts 1.9%
8. PS command - no previous screen 1.7%
9. Valid command at an inappropriate time 1.3%
10. Add-on search, no index name after verb 1.2%
11. All others 13.5%
Ten most frequent EXPLAIN requests:
1. FIND (CC DB) 14.1%
2. CC GUIDE 13.7%
3. CC INDEXES 9.6%
4. LOCATE (ARTICLE DBS) 6.6%
5. COMMANDS 6.4%
6. DATABASES 4.4%
7. Unrecognized term 4.4%
8. CC DATABASE 3.9%
9. CCT INDEXES 2.9%
10. MAIL 2.8%
11. All others 31.3%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.6%
2. First word of command is invalid 12.7%
3. F/BR with index invalid in current DB 8.2%
4. FIND command with invalid index name 6.7%
5. Help requested from SET DB command 6.5%
6. FIND command with zero results 6.2%
7. DISPLAY command - middle of >1 screen 5.6%
8. DISPLAY command-first of >1 screen 3.9%
9. FIND command retrieves >1 book 3.7%
10. DISPLAY command-complete in one screen 3.7%
11. All others 27.1%
Ten most frequent SHOW requests:
1. HISTORY 32.3%
2. SEARCH 15.0%
3. MAIL STATUS 11.4%
4. CC NEWS 7.8%
5. SYSTEM NEWS 6.0%
6. CC GLOSSARY 4.8%
7. SC LIST (CC DBS) 3.6%
8. STATISTICS 1.8%
9. CC SETTINGS 1.8%
10. Invalid term 1.2%
11. All others 14.4%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)