MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 07/28/01 through 08/03/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 81 590 671
Davis 258 31 289
Irvine 171 0 171
Los Angeles 3 232 235
Riverside 26 53 79
San Diego 20 224 244
San Francisco 158 0 158
Santa Barbara 3 83 86
Santa Cruz 7 47 54
LBL 0 56 56
LLL 0 32 32
Los Alamos n/a 0 0
Other - UC 2 32 34
U.S. Forestry 0
Other-Network UC n/a 526 526
_______ ______ _____
729 1,906 2,635
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 43 456 2,964
2-4 a.m. 27 108 619
4-6 a.m. 28 99 800
6-8 a.m. 95 591 7,577
8-10 a.m. 286 942 9,255
10-12 a.m. 488 1,270 10,068
12-2 p.m. 406 1,372 12,660
2-4 p.m. 560 1,625 12,681
4-6 p.m. 388 960 8,372
6-8 p.m. 150 414 2,769
8-10 p.m. 90 301 2,676
10-12 p.m. 74 258 1,411
__________ __________ __________ _________________
Total: 2,635 8,396 71,852
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 182 1,733 1,915
Davis 933 69 1,002
Irvine 600 0 600
Los Angeles 11 645 656
Riverside 55 155 210
San Diego 90 591 681
San Francisco 504 0 504
Santa Barbara 2 267 269
Santa Cruz 38 115 153
LBL 0 138 138
LLL 0 671 671
Los Alamos n/a 0 0
Other - UC 9 61 70
U.S. Forestry 0
Other-Network UC n/a 1,527 1,527
_______ ______ _____
2,424 5,972 8,396
Number of FIND commands by database
CC database 8,269
CCT database 127
Total number of FIND commands 8,396
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,521 15,488 17,009
Davis 7,108 503 7,611
Irvine 4,659 0 4,659
Los Angeles 281 6,565 6,846
Riverside 398 1,328 1,726
San Diego 405 5,205 5,610
San Francisco 3,213 0 3,213
Santa Barbara 94 2,707 2,801
Santa Cruz 156 842 998
LBL 0 1,335 1,335
LLL 0 8,666 8,666
Los Alamos n/a 0 0
Other - UC 14 496 510
U.S. Forestry 0
Other-Network UC n/a 10,868 10,868
_______ ______ _____
17,849 54,003 71,852
Number of Records Displayed by database:
CC database 66,362
CCT database 5,490
Total number of Records Displayed 71,852
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.4%
Percent of CCT sessions 3.6%
Percent of searches done in the CC database 98.5%
Percent of searches done in the CCT database 1.5%
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 5.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.0
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 468:14
Average number of searches completed per session 3.2
Retrievals per search - median 7.0
Retrievals per search - average 477.6
Retrievals per search - standard deviation 4479.3
Percent of searches completed with 0 results 26.0%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 47.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,467 38.4%
DISPLAY (excluding automatic displays) 5,640 29.0%
HELP 119 0.6%
EXPLAIN 146 0.8%
SET/RESET 1,111 5.7%
SHOW 24 0.1%
ADD ON (AND, OR, AND NOT) 802 4.1%
LOGON or LOGOFF 3,023 15.5%
COMMENT 0 0.0%
SAVE 282 1.4%
USE 10 0.1%
OTHER 828 4.3%
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 3,414 39.2% 568 16.6% 30 265.0 1362.1
TITLE WORD 2,319 26.6% 717 30.9% 16 872.3 6811.7
EXACT TITLE 151 1.7% 70 46.4% 1 286.4 2369.5
JOURNAL 356 4.1% 157 44.1% 217 3737.1 8928.3
EXACT JOURNAL 534 6.1% 295 55.2% 60 2241.9 7804.0
SUBJECT CAT 56 0.6% 7 12.5% 9 51.3 87.1
SUBFILE 25 0.3% 3 12.0% 15 278.6 1212.2
PUBLICATION TYPE 57 0.7% 11 19.3% 13 55.3 97.9
LANGUAGE 3 0.0% 1 33.3% 61 61.0 11.3
DATE 185 2.1% 40 21.6% 9 73.4 270.7
ADDED 628 7.2% 381 60.7% 17 32.5 38.6
PERIODICAL 513 5.9% 84 16.4% 4 48.2 279.5
EXACT PE 127 1.5% 18 14.2% 3 11.8 32.4
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 351 4.0% 110 31.3% 13 1746.4 14523.2
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 1,265 17.0% 573 45.3% 11 47.1 253.9
Single 6,171 83.0% 1,310 21.2% 27 794.4 5808.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.4%
SHORT 73.8%
LONG 6.3%
FIELDS 1.7%
PERIODICALS 11.8%
COMMENTS 0.0%
Other 1.0%
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) 42:34
Average number of searches completed per session 1.3
Retrievals per search - median 65.0
Retrievals per search - average 458.0
Retrievals per search - standard deviation 2473.7
Percent of searches completed with 0 results 28.3%
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 124 23.9%
DISPLAY (excluding automatic displays) 195 37.6%
HELP 22 4.2%
EXPLAIN 21 4.0%
SET/RESET 71 13.7%
SHOW 3 0.6%
ADD ON (AND, OR, AND NOT) 3 0.6%
LOGON or LOGOFF 68 13.1%
COMMENT 0 0.0%
SAVE 2 0.4%
USE 0 0.0%
OTHER 10 1.9%
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 76 60.3% 27 35.5% 211 858.2 3805.2
EXACT JOURNAL 42 33.3% 7 16.7% 125 229.8 315.3
SUBJECT CAT 2 1.6% 0 0.0% 4,021 4020.5 5383.2
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 2 1.6% 0 0.0% 110 109.5 147.8
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 4 3.2% 0 0.0% 5 4.8 1.0
By number of indexes:
Multiple 2 1.6% 0 0.0% 110 109.5 147.8
Single 122 98.4% 34 27.9% 146 658.4 2954.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 1.4%
ISSUES 58.7%
SHORT 15.9%
LONG 18.8%
PERIODICALS 4.8%
COMMENTS 0.0%
Other 0.5%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
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Percent of commands that contained errors 7.6%
Ten most frequent errors:
1. NS command - no next screen 34.2%
2. First word of command is invalid 26.2%
3. FIND command with invalid index name 10.0%
4. Index invalid in current database 3.8%
5. DISPLAY command contains invalid word 3.0%
6. Max. # of ports to a Z39 db are in use 2.3%
7. DISPLAY command - no FIND results 1.8%
8. Search term missing from search command 1.7%
9. PS command - no previous screen 1.3%
10. D ABS command in database w/o abstracts 1.3%
11. All others 14.3%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 12.0%
2. CC INDEXES 12.0%
3. Unrecognized term 7.2%
4. CC DATABASE 7.2%
5. DATABASES 6.6%
6. FIND (CC DB) 6.6%
7. LOCATE (ARTICLE DBS) 4.8%
8. COMMANDS 4.8%
9. DISPLAY 3.0%
10. CCT INDEXES 2.4%
11. All others 33.5%
Ten most frequent HELP situations:
1. Help requested from START CC command 16.2%
2. First word of command is invalid 10.4%
3. Help requested from SET DB command 10.1%
4. F/BR with index invalid in current DB 8.4%
5. FIND command retrieves >1 book 6.5%
6. FIND command with invalid index name 5.5%
7. DISPLAY command - middle of >1 screen 4.2%
8. DISPLAY command-first of >1 screen 3.9%
9. DISPLAY command - last of >1 screen 3.9%
10. DISPLAY command-complete in one screen 3.6%
11. All others 27.3%
Ten most frequent SHOW requests:
1. HISTORY 48.1%
2. CC GLOSSARY 11.1%
3. SYSTEM NEWS 7.4%
4. LOCATION 3.7%
5. BIBLIOGRAPHIC SOFTWARE 3.7%
6. SUBFILE 3.7%
7. SC LIST (CC DBS) 3.7%
8. CC STATISTICS 3.7%
9. DLA BULLETIN 3.7%
10. SEARCH 3.7%
11. All others 7.4%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)