MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 02/10/01 through 02/16/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 96 838 934
Davis 375 32 407
Irvine 257 0 257
Los Angeles 60 348 408
Riverside 36 77 113
San Diego 59 298 357
San Francisco 172 0 172
Santa Barbara 47 129 176
Santa Cruz 41 116 157
LBL 0 121 121
LLL 0 64 64
Los Alamos n/a 0 0
Other - UC 1 32 33
U.S. Forestry 0
Other-Network UC n/a 595 595
_______ ______ _____
1,144 2,650 3,794
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 61 244 1,936
2-4 a.m. 41 155 5,812
4-6 a.m. 54 210 1,532
6-8 a.m. 106 637 7,185
8-10 a.m. 405 1,310 12,095
10-12 a.m. 614 1,797 32,214
12-2 p.m. 666 1,695 15,262
2-4 p.m. 741 1,787 16,593
4-6 p.m. 589 1,627 13,334
6-8 p.m. 249 735 7,331
8-10 p.m. 159 530 5,582
10-12 p.m. 109 402 6,554
__________ __________ __________ _________________
Total: 3,794 11,129 125,430
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 209 2,456 2,665
Davis 1,085 75 1,160
Irvine 770 0 770
Los Angeles 124 1,233 1,357
Riverside 58 283 341
San Diego 148 778 926
San Francisco 510 0 510
Santa Barbara 65 417 482
Santa Cruz 56 399 455
LBL 0 328 328
LLL 0 776 776
Los Alamos n/a 0 0
Other - UC 5 76 81
U.S. Forestry 0
Other-Network UC n/a 1,278 1,278
_______ ______ _____
3,030 8,099 11,129
Number of FIND commands by database
CC database 10,911
CCT database 218
Total number of FIND commands 11,129
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 2,970 45,721 48,691
Davis 10,053 786 10,839
Irvine 4,905 0 4,905
Los Angeles 1,049 11,309 12,358
Riverside 465 3,003 3,468
San Diego 845 6,948 7,793
San Francisco 4,208 0 4,208
Santa Barbara 832 2,985 3,817
Santa Cruz 604 3,808 4,412
LBL 0 5,617 5,617
LLL 0 8,164 8,164
Los Alamos n/a 0 0
Other - UC 580 1,071 1,651
U.S. Forestry 0
Other-Network UC n/a 9,507 9,507
_______ ______ _____
26,511 98,919 125,430
Number of Records Displayed by database:
CC database 92,841
CCT database 32,589
Total number of Records Displayed 125,430
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 95.4%
Percent of CCT sessions 4.6%
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 0.9
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) 254:50
Average number of searches completed per session 3.0
Retrievals per search - median 9.0
Retrievals per search - average 335.6
Retrievals per search - standard deviation 3234.0
Percent of searches completed with 0 results 25.3%
Percent of searches entered that are long 0.4%
Percent of long searches completed
(includes partial results) 47.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 10,211 37.3%
DISPLAY (excluding automatic displays) 8,204 30.0%
HELP 271 1.0%
EXPLAIN 271 1.0%
SET/RESET 1,420 5.2%
SHOW 52 0.2%
ADD ON (AND, OR, AND NOT) 700 2.6%
LOGON or LOGOFF 4,625 16.9%
COMMENT 1 0.0%
SAVE 410 1.5%
USE 7 0.0%
OTHER 1,205 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 5,031 43.2% 774 15.4% 29 208.5 1374.6
TITLE WORD 3,403 29.2% 1,082 31.8% 14 462.9 2690.7
EXACT TITLE 169 1.5% 81 47.9% 4 168.4 871.6
JOURNAL 528 4.5% 266 50.4% 339 3392.5 10116.7
EXACT JOURNAL 521 4.5% 320 61.4% 36 1112.4 4625.4
SUBJECT CAT 75 0.6% 17 22.7% 24 42.0 44.2
SUBFILE 21 0.2% 0 0.0% 55 446.7 1313.5
PUBLICATION TYPE 36 0.3% 5 13.9% 9 7312.3 40462.4
LANGUAGE 27 0.2% 5 18.5% 4 13.9 37.6
DATE 159 1.4% 29 18.2% 10 172.2 731.2
ADDED 614 5.3% 424 69.1% 18 28.4 33.7
PERIODICAL 357 3.1% 45 12.6% 4 73.8 736.5
EXACT PE 103 0.9% 10 9.7% 3 8.5 17.0
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 602 5.2% 172 28.6% 17 621.0 2911.5
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 1,435 14.1% 688 47.9% 9 62.5 386.8
Single 8,740 85.9% 1,847 21.1% 28 515.5 4042.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.1%
SHORT 77.9%
LONG 6.9%
FIELDS 2.2%
PERIODICALS 7.4%
COMMENTS 0.0%
Other 1.6%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 62:36
Average number of searches completed per session 1.2
Retrievals per search - median 82.5
Retrievals per search - average 2070.7
Retrievals per search - standard deviation 8607.7
Percent of searches completed with 0 results 25.7%
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 209 21.0%
DISPLAY (excluding automatic displays) 286 28.7%
HELP 90 9.0%
EXPLAIN 47 4.7%
SET/RESET 116 11.6%
SHOW 19 1.9%
ADD ON (AND, OR, AND NOT) 9 0.9%
LOGON or LOGOFF 172 17.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 1 0.1%
OTHER 47 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:
JOURNAL 131 61.2% 36 27.5% 172 852.1 2308.2
EXACT JOURNAL 50 23.4% 19 38.0% 86 192.0 272.6
SUBJECT CAT 15 7.0% 1 6.7% 11,754 24269.7 24950.8
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 5 2.3% 1 20.0% 10 23.0 30.2
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 13 6.1% 0 0.0% 1 38.5 123.3
By number of indexes:
Multiple 5 2.4% 1 20.0% 10 23.0 30.2
Single 204 97.6% 55 27.0% 147 2866.4 10295.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
ISSUES 53.4%
SHORT 12.2%
LONG 25.6%
PERIODICALS 4.3%
COMMENTS 0.0%
Other 1.4%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.3%
Ten most frequent errors:
1. NS command - no next screen 32.0%
2. First word of command is invalid 28.0%
3. FIND command with invalid index name 9.4%
4. Index invalid in current database 5.1%
5. DISPLAY command contains invalid word 2.3%
6. DISPLAY command - no FIND results 2.1%
7. Max. # of ports to a Z39 db are in use 2.1%
8. PS command - no previous screen 2.0%
9. Search term missing from search command 1.8%
10. D ABS command in database w/o abstracts 1.6%
11. All others 13.6%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 16.7%
2. FIND (CC DB) 12.6%
3. CC INDEXES 11.0%
4. LOCATE (ARTICLE DBS) 8.8%
5. COMMANDS 6.9%
6. Unrecognized term 4.7%
7. CC DATABASE 4.7%
8. SUBJECT CATEGORY 3.8%
9. DATABASES 3.5%
10. CCT INDEXES 3.1%
11. All others 24.2%
Ten most frequent HELP situations:
1. Help requested from START CC command 14.1%
2. First word of command is invalid 12.5%
3. F/BR with index invalid in current DB 10.3%
4. Help requested from SET DB command 8.2%
5. FIND command with invalid index name 7.8%
6. DISPLAY command-first of >1 screen 5.3%
7. FIND command with zero results 5.0%
8. DISPLAY command - middle of >1 screen 4.6%
9. DISPLAY command-complete in one screen 3.5%
10. FIND command retrieves >1 book 3.2%
11. All others 25.3%
Ten most frequent SHOW requests:
1. HISTORY 45.7%
2. SYSTEM NEWS 12.9%
3. CC GLOSSARY 7.1%
4. CC NEWS 5.7%
5. SC LIST (CC DBS) 5.7%
6. SEARCH 5.7%
7. MAIL STATUS 2.9%
8. UPDATE 2.9%
9. GLOSSARY 1.4%
10. SYSTEM1 NEWS 1.4%
11. All others 8.6%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)