MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 07/14/01 through 07/20/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 59 595 654
Davis 262 27 289
Irvine 227 0 227
Los Angeles 2 185 187
Riverside 30 72 102
San Diego 27 186 213
San Francisco 174 0 174
Santa Barbara 3 95 98
Santa Cruz 10 87 97
LBL 0 81 81
LLL 0 51 51
Los Alamos n/a 0 0
Other - UC 0 35 35
U.S. Forestry 0
Other-Network UC n/a 617 617
_______ ______ _____
794 2,031 2,825
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 58 284 2,400
2-4 a.m. 34 150 13,634
4-6 a.m. 23 57 445
6-8 a.m. 126 623 6,460
8-10 a.m. 303 975 50,693
10-12 a.m. 536 1,573 32,599
12-2 p.m. 446 1,209 10,689
2-4 p.m. 549 1,503 15,145
4-6 p.m. 395 1,030 7,894
6-8 p.m. 159 597 3,117
8-10 p.m. 109 384 3,631
10-12 p.m. 87 319 1,720
__________ __________ __________ _________________
Total: 2,825 8,704 148,427
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 178 1,525 1,703
Davis 946 53 999
Irvine 681 0 681
Los Angeles 5 498 503
Riverside 77 192 269
San Diego 81 439 520
San Francisco 416 0 416
Santa Barbara 17 309 326
Santa Cruz 28 222 250
LBL 0 251 251
LLL 0 918 918
Los Alamos n/a 0 0
Other - UC 0 121 121
U.S. Forestry 0
Other-Network UC n/a 1,747 1,747
_______ ______ _____
2,429 6,275 8,704
Number of FIND commands by database
CC database 8,518
CCT database 186
Total number of FIND commands 8,704
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,433 25,607 27,040
Davis 63,972 291 64,263
Irvine 4,892 0 4,892
Los Angeles 9 4,985 4,994
Riverside 317 3,977 4,294
San Diego 716 3,331 4,047
San Francisco 3,491 0 3,491
Santa Barbara 131 4,069 4,200
Santa Cruz 283 2,585 2,868
LBL 0 1,720 1,720
LLL 0 13,591 13,591
Los Alamos n/a 0 0
Other - UC 0 1,149 1,149
U.S. Forestry 0
Other-Network UC n/a 11,878 11,878
_______ ______ _____
75,244 73,183 148,427
Number of Records Displayed by database:
CC database 141,801
CCT database 6,626
Total number of Records Displayed 148,427
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.1%
Percent of CCT sessions 3.9%
Percent of searches done in the CC database 97.9%
Percent of searches done in the CCT database 2.1%
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 4.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.0
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 1159
Average number of searches completed per session 3.1
Retrievals per search - median 8.0
Retrievals per search - average 561.9
Retrievals per search - standard deviation 6680.4
Percent of searches completed with 0 results 26.8%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 72.7%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,703 38.6%
DISPLAY (excluding automatic displays) 5,514 27.7%
HELP 102 0.5%
EXPLAIN 140 0.7%
SET/RESET 1,234 6.2%
SHOW 26 0.1%
ADD ON (AND, OR, AND NOT) 815 4.1%
LOGON or LOGOFF 3,194 16.0%
COMMENT 0 0.0%
SAVE 389 2.0%
USE 7 0.0%
OTHER 812 4.1%
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 3,612 39.3% 609 16.9% 33 310.5 2477.2
TITLE WORD 2,388 26.0% 723 30.3% 15 1064.2 6897.2
EXACT TITLE 131 1.4% 62 47.3% 12 341.2 890.1
JOURNAL 407 4.4% 170 41.8% 129 3984.3 32003.8
EXACT JOURNAL 676 7.4% 377 55.8% 49 1037.7 4396.8
SUBJECT CAT 32 0.3% 5 15.6% 13 37.6 94.4
SUBFILE 16 0.2% 0 0.0% 146 517.3 1392.9
PUBLICATION TYPE 33 0.4% 6 18.2% 70 6430.7 17947.0
LANGUAGE 5 0.1% 1 20.0% 246 263.5 275.4
DATE 166 1.8% 22 13.3% 14 361.0 1232.5
ADDED 857 9.3% 539 62.9% 21 37.2 48.1
PERIODICAL 428 4.7% 101 23.6% 6 133.8 1792.1
EXACT PE 89 1.0% 6 6.7% 3 24.8 137.0
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 351 3.8% 96 27.3% 24 1588.4 6756.4
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 1,485 19.3% 728 49.0% 16 118.1 613.6
Single 6,195 80.7% 1,251 20.2% 31 910.7 8648.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
SHORT 78.5%
LONG 3.8%
FIELDS 2.5%
PERIODICALS 9.5%
COMMENTS 0.0%
Other 1.3%
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) 77:25
Average number of searches completed per session 1.7
Retrievals per search - median 61.5
Retrievals per search - average 380.9
Retrievals per search - standard deviation 2085.6
Percent of searches completed with 0 results 28.5%
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 186 26.4%
DISPLAY (excluding automatic displays) 292 41.5%
HELP 26 3.7%
EXPLAIN 19 2.7%
SET/RESET 82 11.6%
SHOW 3 0.4%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 75 10.7%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 21 3.0%
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 114 61.3% 35 30.7% 141 722.8 3152.6
EXACT JOURNAL 62 33.3% 18 29.0% 145 307.3 505.5
SUBJECT CAT 0 0.0% 0 0.0% 0 0.0 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 10 5.4% 0 0.0% 11 21.4 21.9
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 186 100% 53 28.5% 125 532.6 2452.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.2%
ISSUES 54.9%
SHORT 23.6%
LONG 11.8%
PERIODICALS 5.4%
COMMENTS 0.0%
Other 1.9%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.7%
Ten most frequent errors:
1. NS command - no next screen 33.3%
2. First word of command is invalid 27.4%
3. FIND command with invalid index name 8.1%
4. Max. # of ports to a Z39 db are in use 3.5%
5. Index invalid in current database 2.9%
6. DISPLAY command contains invalid word 2.4%
7. DISPLAY command - no FIND results 2.3%
8. D ABS command in database w/o abstracts 2.1%
9. PS command - no previous screen 1.4%
10. Valid command at an inappropriate time 1.3%
11. All others 15.2%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 15.1%
2. FIND (CC DB) 11.3%
3. CC INDEXES 10.7%
4. LOCATE (ARTICLE DBS) 7.5%
5. COMMANDS 6.3%
6. CC DATABASE 4.4%
7. 5360 3.8%
8. MAIL 2.5%
9. CURRENT DATES 2.5%
10. ADD-ON SEARCH 2.5%
11. All others 33.3%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.7%
2. First word of command is invalid 12.2%
3. Help requested from SET DB command 7.7%
4. DISPLAY command-first of >1 screen 6.6%
5. F/BR with index invalid in current DB 6.6%
6. FIND command with invalid index name 6.3%
7. DISPLAY command - middle of >1 screen 6.3%
8. NS command - no next screen 3.5%
9. DISPLAY command - last of >1 screen 3.5%
10. Help requested from FIND PA command 3.5%
11. All others 28.2%
Ten most frequent SHOW requests:
1. HISTORY 70.0%
2. SYSTEM1 NEWS 10.0%
3. CC GLOSSARY 10.0%
4. SYSTEM NEWS 5.0%
5. SC LIST (CC DBS) 5.0%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)