MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 06/02/01 through 06/08/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 53 536 589
Davis 358 24 382
Irvine 211 0 211
Los Angeles 2 277 279
Riverside 21 48 69
San Diego 70 283 353
San Francisco 168 0 168
Santa Barbara 3 142 145
Santa Cruz 21 64 85
LBL 0 117 117
LLL 0 36 36
Los Alamos n/a 0 0
Other - UC 0 44 44
U.S. Forestry 0
Other-Network UC n/a 553 553
_______ ______ _____
907 2,124 3,031
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 68 228 3,046
2-4 a.m. 34 145 1,297
4-6 a.m. 46 101 1,008
6-8 a.m. 85 620 6,189
8-10 a.m. 373 1,315 10,996
10-12 a.m. 503 1,567 11,849
12-2 p.m. 533 1,337 13,802
2-4 p.m. 620 1,583 15,529
4-6 p.m. 401 1,168 17,885
6-8 p.m. 144 398 8,520
8-10 p.m. 120 368 5,671
10-12 p.m. 104 382 3,419
__________ __________ __________ _________________
Total: 3,031 9,212 99,211
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 130 1,469 1,599
Davis 1,106 80 1,186
Irvine 596 0 596
Los Angeles 2 747 749
Riverside 35 168 203
San Diego 337 792 1,129
San Francisco 444 0 444
Santa Barbara 6 327 333
Santa Cruz 29 161 190
LBL 0 330 330
LLL 0 655 655
Los Alamos n/a 0 0
Other - UC 0 124 124
U.S. Forestry 0
Other-Network UC n/a 1,674 1,674
_______ ______ _____
2,685 6,527 9,212
Number of FIND commands by database
CC database 9,031
CCT database 181
Total number of FIND commands 9,212
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,582 15,347 16,929
Davis 9,041 286 9,327
Irvine 4,480 0 4,480
Los Angeles 4 5,888 5,892
Riverside 186 1,088 1,274
San Diego 1,764 6,720 8,484
San Francisco 23,487 0 23,487
Santa Barbara 126 4,536 4,662
Santa Cruz 1,648 1,343 2,991
LBL 0 3,904 3,904
LLL 0 6,988 6,988
Los Alamos n/a 0 0
Other - UC 0 682 682
U.S. Forestry 0
Other-Network UC n/a 10,111 10,111
_______ ______ _____
42,318 56,893 99,211
Number of Records Displayed by database:
CC database 73,635
CCT database 25,576
Total number of Records Displayed 99,211
1.4 Relative Use of Databases
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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 98.0%
Percent of searches done in the CCT database 2.0%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.4
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.4
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 323:07
Average number of searches completed per session 3.1
Retrievals per search - median 9.0
Retrievals per search - average 1066.7
Retrievals per search - standard deviation 8179.6
Percent of searches completed with 0 results 26.2%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 57.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,002 37.3%
DISPLAY (excluding automatic displays) 5,934 27.7%
HELP 157 0.7%
EXPLAIN 170 0.8%
SET/RESET 1,162 5.4%
SHOW 43 0.2%
ADD ON (AND, OR, AND NOT) 1,029 4.8%
LOGON or LOGOFF 3,641 17.0%
COMMENT 0 0.0%
SAVE 354 1.7%
USE 9 0.0%
OTHER 934 4.4%
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 3,835 40.9% 635 16.6% 29 272.4 1997.7
TITLE WORD 2,482 26.5% 818 33.0% 15 1162.4 6895.0
EXACT TITLE 170 1.8% 87 51.2% 2 88.9 475.9
JOURNAL 427 4.6% 213 49.9% 244 4965.0 18820.4
EXACT JOURNAL 627 6.7% 311 49.6% 65 1541.2 8928.0
SUBJECT CAT 55 0.6% 2 3.6% 17 151.7 460.9
SUBFILE 35 0.4% 4 11.4% 14 879.4 3777.0
PUBLICATION TYPE 27 0.3% 6 22.2% 23 132.3 249.7
LANGUAGE 3 0.0% 1 33.3% 6 6.0 7.1
DATE 201 2.1% 35 17.4% 5 72.1 317.2
ADDED 573 6.1% 395 68.9% 26 36.9 36.8
PERIODICAL 466 5.0% 88 18.9% 6 195.8 2100.4
EXACT PE 47 0.5% 7 14.9% 8 19.5 29.6
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 427 4.6% 125 29.3% 30 1036.2 5110.1
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 1,369 17.2% 636 46.5% 10 83.5 809.2
Single 6,609 82.8% 1,440 21.8% 32 906.2 6314.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.4%
SHORT 76.6%
LONG 3.6%
FIELDS 1.6%
PERIODICALS 10.3%
COMMENTS 0.0%
Other 1.4%
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) 192:19
Average number of searches completed per session 1.5
Retrievals per search - median 50.0
Retrievals per search - average 483.9
Retrievals per search - standard deviation 1717.7
Percent of searches completed with 0 results 27.1%
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 181 21.7%
DISPLAY (excluding automatic displays) 241 28.9%
HELP 56 6.7%
EXPLAIN 26 3.1%
SET/RESET 72 8.6%
SHOW 5 0.6%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 126 15.1%
COMMENT 0 0.0%
SAVE 102 12.2%
USE 1 0.1%
OTHER 24 2.9%
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:
JOURNAL 96 52.7% 33 34.4% 149 373.2 1253.1
EXACT JOURNAL 60 33.0% 12 20.0% 92 142.8 180.4
SUBJECT CAT 7 3.8% 0 0.0% 8,156 8148.7 9.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 1 0.5% 0 0.0% 1 1.0 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 18 9.9% 4 22.2% 8 12.8 18.9
By number of indexes:
Multiple 1 0.6% 0 0.0% 1 1.0 0.0
Single 180 99.4% 49 27.2% 112 668.6 1990.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.6%
ISSUES 55.2%
SHORT 7.7%
LONG 19.6%
PERIODICALS 10.8%
COMMENTS 0.0%
Other 3.1%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 32.4%
2. First word of command is invalid 26.9%
3. FIND command with invalid index name 8.8%
4. Max. # of ports to a Z39 db are in use 4.3%
5. Index invalid in current database 3.8%
6. DISPLAY command contains invalid word 2.6%
7. Search term missing from search command 2.0%
8. Add-on search, no index name after verb 1.7%
9. PS command - no previous screen 1.6%
10. D ABS command in database w/o abstracts 1.3%
11. All others 14.8%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 17.9%
2. FIND (CC DB) 13.8%
3. CC INDEXES 13.3%
4. COMMANDS 5.1%
5. LOCATE (ARTICLE DBS) 4.6%
6. DISPLAY 4.6%
7. Unrecognized term 3.6%
8. CCT DATABASE 3.6%
9. DATABASES 3.1%
10. ADD-ON SEARCH 2.6%
11. All others 28.1%
Ten most frequent HELP situations:
1. Help requested from START CC command 14.4%
2. First word of command is invalid 12.5%
3. Help requested from SET DB command 11.0%
4. F/BR with index invalid in current DB 10.8%
5. FIND command with invalid index name 7.3%
6. FIND command retrieves >1 book 5.9%
7. FIND command with zero results 5.4%
8. DISPLAY command-first of >1 screen 3.7%
9. DISPLAY command-complete in one screen 3.2%
10. DISPLAY command - last of >1 screen 2.9%
11. All others 23.0%
Ten most frequent SHOW requests:
1. HISTORY 54.8%
2. SEARCH 9.7%
3. CC NEWS 6.5%
4. MAIL STATUS 6.5%
5. GLOSSARY 3.2%
6. SYSTEM NEWS 3.2%
7. SYSTEM4 NEWS 3.2%
8. STATISTICS 3.2%
9. CC SETTINGS 3.2%
10. SC LIST (CC DBS) 3.2%
11. All others 3.2%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)