MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 11/17/01 through 11/23/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 75 462 537
Davis 229 25 254
Irvine 117 0 117
Los Angeles 0 124 124
Riverside 15 34 49
San Diego 23 157 180
San Francisco 87 0 87
Santa Barbara 12 52 64
Santa Cruz 1 33 34
LBL 0 62 62
LLL 0 21 21
Los Alamos n/a 0 0
Other - UC 0 65 65
U.S. Forestry 0
Other-Network UC n/a 384 384
_______ ______ _____
559 1,419 1,978
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 40 153 1,392
2-4 a.m. 31 111 9,886
4-6 a.m. 21 74 400
6-8 a.m. 40 96 921
8-10 a.m. 212 589 5,333
10-12 a.m. 383 1,067 7,819
12-2 p.m. 322 715 7,271
2-4 p.m. 384 1,028 9,774
4-6 p.m. 276 774 7,982
6-8 p.m. 122 326 2,319
8-10 p.m. 72 202 1,357
10-12 p.m. 75 254 1,605
__________ __________ __________ _________________
Total: 1,978 5,389 56,059
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 218 1,185 1,403
Davis 581 60 641
Irvine 278 0 278
Los Angeles 0 304 304
Riverside 64 158 222
San Diego 68 460 528
San Francisco 223 0 223
Santa Barbara 10 158 168
Santa Cruz 1 96 97
LBL 0 156 156
LLL 0 52 52
Los Alamos n/a 0 0
Other - UC 0 135 135
U.S. Forestry 0
Other-Network UC n/a 1,182 1,182
_______ ______ _____
1,443 3,946 5,389
Number of FIND commands by database
CC database 5,309
CCT database 80
Total number of FIND commands 5,389
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,780 11,352 14,132
Davis 4,641 518 5,159
Irvine 9,317 0 9,317
Los Angeles 0 2,621 2,621
Riverside 280 1,274 1,554
San Diego 312 3,838 4,150
San Francisco 1,158 0 1,158
Santa Barbara 32 1,117 1,149
Santa Cruz 15 1,117 1,132
LBL 0 3,966 3,966
LLL 0 556 556
Los Alamos n/a 0 0
Other - UC 0 2,557 2,557
U.S. Forestry 0
Other-Network UC n/a 8,608 8,608
_______ ______ _____
18,535 37,524 56,059
Number of Records Displayed by database:
CC database 53,137
CCT database 2,922
Total number of Records Displayed 56,059
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 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 1.1
Standard deviation in seconds 4.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.7
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) 649:35
Average number of searches completed per session 2.8
Retrievals per search - median 8.0
Retrievals per search - average 420.6
Retrievals per search - standard deviation 3187.2
Percent of searches completed with 0 results 22.7%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 69.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,800 36.1%
DISPLAY (excluding automatic displays) 3,921 29.5%
HELP 125 0.9%
EXPLAIN 147 1.1%
SET/RESET 865 6.5%
SHOW 19 0.1%
ADD ON (AND, OR, AND NOT) 509 3.8%
LOGON or LOGOFF 2,197 16.5%
COMMENT 0 0.0%
SAVE 157 1.2%
USE 1 0.0%
OTHER 552 4.2%
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:
PERSONAL AUTHOR 2,081 40.1% 310 14.9% 30 243.6 1830.2
TITLE WORD 1,805 34.8% 520 28.8% 11 647.3 3464.2
EXACT TITLE 94 1.8% 37 39.4% 4 23.8 67.0
JOURNAL 205 4.0% 85 41.5% 422 4727.5 14331.1
EXACT JOURNAL 77 1.5% 37 48.1% 1,095 2387.8 3688.7
SUBJECT CAT 24 0.5% 2 8.3% 11 20.0 21.9
SUBFILE 25 0.5% 1 4.0% 28 149.7 372.8
PUBLICATION TYPE 8 0.2% 2 25.0% 50 50.7 35.1
LANGUAGE 3 0.1% 0 0.0% 168 112.3 96.4
DATE 121 2.3% 18 14.9% 9 100.4 266.5
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 388 7.5% 52 13.4% 5 168.6 1937.6
EXACT PE 117 2.3% 10 8.5% 5 93.5 295.1
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 240 4.6% 73 30.4% 21 1166.1 4294.2
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 403 8.5% 90 22.3% 6 55.6 192.1
Single 4,365 91.5% 962 22.0% 24 637.3 3948.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.7%
SHORT 73.4%
LONG 3.8%
FIELDS 1.1%
PERIODICALS 15.5%
COMMENTS 0.0%
Other 1.6%
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) 26:18
Average number of searches completed per session 1.0
Retrievals per search - median 44.0
Retrievals per search - average 473.8
Retrievals per search - standard deviation 2283.0
Percent of searches completed with 0 results 23.7%
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 80 20.9%
DISPLAY (excluding automatic displays) 130 33.9%
HELP 24 6.3%
EXPLAIN 11 2.9%
SET/RESET 60 15.7%
SHOW 8 2.1%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 58 15.1%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 12 3.1%
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:
JOURNAL 45 56.3% 15 33.3% 226 1037.0 3659.4
EXACT JOURNAL 17 21.2% 4 23.5% 150 503.2 695.0
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 18 22.5% 0 0.0% 3 14.2 32.4
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 80 100% 19 23.7% 94 621.4 2601.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.3%
ISSUES 41.1%
SHORT 18.5%
LONG 11.6%
PERIODICALS 17.8%
COMMENTS 0.0%
Other 0.7%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.5%
Ten most frequent errors:
1. First word of command is invalid 31.7%
2. NS command - no next screen 30.2%
3. FIND command with invalid index name 10.9%
4. Index invalid in current database 4.5%
5. DISPLAY command contains invalid word 2.9%
6. PS command - no previous screen 2.1%
7. Max. # of ports to a Z39 db are in use 2.0%
8. Search term missing from search command 2.0%
9. Valid command at an inappropriate time 1.7%
10. D ABS command in database w/o abstracts 1.3%
11. All others 10.7%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 12.0%
2. FIND (CC DB) 11.4%
3. LOCATE (ARTICLE DBS) 10.8%
4. CC INDEXES 9.5%
5. DATABASES 5.1%
6. Unrecognized term 3.8%
7. MAIL 3.2%
8. COMMANDS 3.2%
9. SUBJECT CATEGORY 3.2%
10. CC DATABASE 3.2%
11. All others 34.8%
Ten most frequent HELP situations:
1. First word of command is invalid 15.3%
2. Help requested from START CC command 12.4%
3. Help requested from SET DB command 8.1%
4. F/BR with index invalid in current DB 7.8%
5. FIND command with invalid index name 7.2%
6. FIND command retrieves >1 book 6.8%
7. DISPLAY command-complete in one screen 5.5%
8. FIND command with zero results 5.2%
9. DISPLAY command-first of >1 screen 4.6%
10. DISPLAY command - middle of >1 screen 4.6%
11. All others 22.5%
Ten most frequent SHOW requests:
1. HISTORY 51.9%
2. SYSTEM NEWS 18.5%
3. LIBRARY NEWS 7.4%
4. MAIL STATUS 7.4%
5. CC SETTINGS 3.7%
6. CC NEWS 3.7%
7. SEARCH 3.7%
8. DATABASES 3.7%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)