MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 08/11/01 through 08/17/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 51 587 638
Davis 292 69 361
Irvine 119 0 119
Los Angeles 0 206 206
Riverside 24 49 73
San Diego 30 158 188
San Francisco 164 0 164
Santa Barbara 4 65 69
Santa Cruz 32 85 117
LBL 0 62 62
LLL 0 42 42
Los Alamos n/a 0 0
Other - UC 2 14 16
U.S. Forestry 0
Other-Network UC n/a 559 559
_______ ______ _____
718 1,896 2,614
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 42 324 2,361
2-4 a.m. 23 161 1,314
4-6 a.m. 28 101 675
6-8 a.m. 71 609 4,751
8-10 a.m. 327 1,046 8,002
10-12 a.m. 491 1,276 11,406
12-2 p.m. 476 1,191 9,879
2-4 p.m. 545 1,453 13,817
4-6 p.m. 357 972 8,836
6-8 p.m. 130 365 3,539
8-10 p.m. 76 191 2,176
10-12 p.m. 48 220 1,836
__________ __________ __________ _________________
Total: 2,614 7,909 68,592
1.2 FIND commands
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Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 75 1,506 1,581
Davis 1,133 203 1,336
Irvine 341 0 341
Los Angeles 0 568 568
Riverside 31 146 177
San Diego 109 400 509
San Francisco 380 0 380
Santa Barbara 4 156 160
Santa Cruz 56 248 304
LBL 0 145 145
LLL 0 646 646
Los Alamos n/a 0 0
Other - UC 3 67 70
U.S. Forestry 0
Other-Network UC n/a 1,692 1,692
_______ ______ _____
2,132 5,777 7,909
Number of FIND commands by database
CC database 7,811
CCT database 98
Total number of FIND commands 7,909
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 830 15,332 16,162
Davis 8,403 460 8,863
Irvine 1,818 0 1,818
Los Angeles 0 5,821 5,821
Riverside 460 2,439 2,899
San Diego 261 2,598 2,859
San Francisco 5,790 0 5,790
Santa Barbara 10 2,061 2,071
Santa Cruz 928 1,834 2,762
LBL 0 3,740 3,740
LLL 0 5,419 5,419
Los Alamos n/a 0 0
Other - UC 23 747 770
U.S. Forestry 0
Other-Network UC n/a 9,618 9,618
_______ ______ _____
18,523 50,069 68,592
Number of Records Displayed by database:
CC database 63,519
CCT database 5,073
Total number of Records Displayed 68,592
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.6%
Percent of CCT sessions 3.4%
Percent of searches done in the CC database 98.8%
Percent of searches done in the CCT database 1.2%
1.5 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.1
Standard deviation in seconds 6.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 6.7
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) 408:29
Average number of searches completed per session 3.1
Retrievals per search - median 7.0
Retrievals per search - average 449.7
Retrievals per search - standard deviation 6126.5
Percent of searches completed with 0 results 26.5%
Percent of searches entered that are long 0.5%
Percent of long searches completed
(includes partial results) 92.5%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 7,024 38.1%
DISPLAY (excluding automatic displays) 5,385 29.2%
HELP 96 0.5%
EXPLAIN 108 0.6%
SET/RESET 1,179 6.4%
SHOW 10 0.1%
ADD ON (AND, OR, AND NOT) 787 4.3%
LOGON or LOGOFF 2,797 15.2%
COMMENT 0 0.0%
SAVE 291 1.6%
USE 5 0.0%
OTHER 756 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 3,303 40.2% 471 14.3% 32 331.5 1787.4
TITLE WORD 2,125 25.9% 668 31.4% 12 604.1 3593.7
EXACT TITLE 96 1.2% 55 57.3% 4 50.8 196.1
JOURNAL 367 4.5% 164 44.7% 274 5991.4 35218.9
EXACT JOURNAL 632 7.7% 417 66.0% 54 1437.6 5093.8
SUBJECT CAT 54 0.7% 3 5.6% 14 436.4 1320.6
SUBFILE 2 0.0% 0 0.0% 2,957 2957.0 3886.3
PUBLICATION TYPE 12 0.1% 1 8.3% 3 6.2 8.8
LANGUAGE 1 0.0% 0 0.0% 14 14.0 0.0
DATE 155 1.9% 27 17.4% 13 120.3 324.9
ADDED 617 7.5% 422 68.4% 18 26.8 25.4
PERIODICAL 415 5.1% 65 15.7% 5 144.2 2056.0
EXACT PE 149 1.8% 24 16.1% 4 32.8 160.6
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 285 3.5% 93 32.6% 20 290.3 869.2
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 1,180 16.8% 581 49.2% 10 86.7 485.6
Single 5,832 83.2% 1,238 21.2% 29 740.5 7966.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.1%
SHORT 73.3%
LONG 7.8%
FIELDS 2.4%
PERIODICALS 10.4%
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) 29:15
Average number of searches completed per session 1.1
Retrievals per search - median 47.5
Retrievals per search - average 214.3
Retrievals per search - standard deviation 394.9
Percent of searches completed with 0 results 29.6%
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 97 20.5%
DISPLAY (excluding automatic displays) 176 37.2%
HELP 33 7.0%
EXPLAIN 20 4.2%
SET/RESET 70 14.8%
SHOW 5 1.1%
ADD ON (AND, OR, AND NOT) 1 0.2%
LOGON or LOGOFF 58 12.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 13 2.7%
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 72 74.2% 21 29.2% 191 331.6 474.0
EXACT JOURNAL 19 19.6% 6 31.6% 114 313.7 354.4
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 6 6.2% 2 33.3% 2 2.3 1.5
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 97 100% 29 29.9% 155 308.8 442.9
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.3%
ISSUES 50.5%
SHORT 21.5%
LONG 18.8%
PERIODICALS 4.3%
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 7.3%
Ten most frequent errors:
1. NS command - no next screen 35.0%
2. First word of command is invalid 27.5%
3. FIND command with invalid index name 8.6%
4. Max. # of ports to a Z39 db are in use 3.0%
5. Index invalid in current database 2.9%
6. Search term missing from search command 2.4%
7. DISPLAY command - no FIND results 2.1%
8. PS command - no previous screen 1.9%
9. DISPLAY command contains invalid word 1.7%
10. Add-on search, no index name after verb 1.5%
11. All others 13.2%
Ten most frequent EXPLAIN requests:
1. FIND (CC DB) 21.1%
2. CC INDEXES 10.9%
3. CC GUIDE 10.2%
4. COMMANDS 6.3%
5. CC DATABASE 6.3%
6. FIND (CCT DB) 4.7%
7. CCT INDEXES 4.7%
8. Unrecognized term 3.9%
9. 1752 3.9%
10. SUBJECT CATEGORY 3.9%
11. All others 24.2%
Ten most frequent HELP situations:
1. Help requested from START CC command 15.6%
2. First word of command is invalid 13.6%
3. FIND command with zero results 9.3%
4. Help requested from SET DB command 8.9%
5. F/BR with index invalid in current DB 6.6%
6. FIND command with invalid index name 5.1%
7. DISPLAY command - middle of >1 screen 3.1%
8. NS command - no next screen 2.7%
9. DISPLAY command-complete in one screen 2.7%
10. DISPLAY command-first of >1 screen 2.7%
11. All others 29.6%
Ten most frequent SHOW requests:
1. HISTORY 33.3%
2. CC SETTINGS 13.3%
3. CC GLOSSARY 13.3%
4. CC NEWS 13.3%
5. MAIL STATUS 13.3%
6. SYSTEM NEWS 6.7%
7. SYSTEM5 NEWS 6.7%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)