MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 09/22/01 through 09/28/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 78 607 685
Davis 290 19 309
Irvine 157 0 157
Los Angeles 1 174 175
Riverside 22 54 76
San Diego 32 170 202
San Francisco 142 0 142
Santa Barbara 14 96 110
Santa Cruz 13 34 47
LBL 0 88 88
LLL 0 31 31
Los Alamos n/a 0 0
Other - UC 0 26 26
U.S. Forestry 0
Other-Network UC n/a 541 541
_______ ______ _____
749 1,840 2,589
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 71 314 4,281
2-4 a.m. 37 203 2,093
4-6 a.m. 36 119 1,027
6-8 a.m. 73 204 1,862
8-10 a.m. 330 792 5,168
10-12 a.m. 509 1,374 12,056
12-2 p.m. 405 1,100 10,356
2-4 p.m. 502 1,229 10,609
4-6 p.m. 345 911 13,490
6-8 p.m. 131 373 3,205
8-10 p.m. 76 261 3,308
10-12 p.m. 74 202 1,174
__________ __________ __________ _________________
Total: 2,589 7,082 68,629
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 147 1,476 1,623
Davis 1,112 40 1,152
Irvine 374 0 374
Los Angeles 2 561 563
Riverside 35 187 222
San Diego 82 477 559
San Francisco 409 0 409
Santa Barbara 19 297 316
Santa Cruz 24 60 84
LBL 0 220 220
LLL 0 97 97
Los Alamos n/a 0 0
Other - UC 0 89 89
U.S. Forestry 0
Other-Network UC n/a 1,374 1,374
_______ ______ _____
2,204 4,878 7,082
Number of FIND commands by database
CC database 6,965
CCT database 117
Total number of FIND commands 7,082
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,347 12,886 14,233
Davis 7,041 315 7,356
Irvine 2,779 0 2,779
Los Angeles 6 3,887 3,893
Riverside 315 1,827 2,142
San Diego 459 10,452 10,911
San Francisco 8,438 0 8,438
Santa Barbara 412 3,099 3,511
Santa Cruz 333 796 1,129
LBL 0 1,806 1,806
LLL 0 622 622
Los Alamos n/a 0 0
Other - UC 0 587 587
U.S. Forestry 0
Other-Network UC n/a 11,222 11,222
_______ ______ _____
21,130 47,499 68,629
Number of Records Displayed by database:
CC database 64,727
CCT database 3,902
Total number of Records Displayed 68,629
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 95.6%
Percent of CCT sessions 4.4%
Percent of searches done in the CC database 98.3%
Percent of searches done in the CCT database 1.7%
1.5 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.5
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 3.5
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 547:18
Average number of searches completed per session 2.8
Retrievals per search - median 8.0
Retrievals per search - average 407.4
Retrievals per search - standard deviation 3310.2
Percent of searches completed with 0 results 22.3%
Percent of searches entered that are long 0.4%
Percent of long searches completed
(includes partial results) 73.3%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 6,315 36.5%
DISPLAY (excluding automatic displays) 4,907 28.4%
HELP 142 0.8%
EXPLAIN 149 0.9%
SET/RESET 1,101 6.4%
SHOW 34 0.2%
ADD ON (AND, OR, AND NOT) 650 3.8%
LOGON or LOGOFF 2,956 17.1%
COMMENT 0 0.0%
SAVE 277 1.6%
USE 2 0.0%
OTHER 761 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 3,003 43.4% 451 15.0% 30 258.8 1837.0
TITLE WORD 2,089 30.2% 657 31.4% 13 538.7 3871.8
EXACT TITLE 130 1.9% 49 37.7% 5 124.5 750.5
JOURNAL 319 4.6% 76 23.8% 476 3102.7 9817.1
EXACT JOURNAL 132 1.9% 57 43.2% 455 4703.1 13288.6
SUBJECT CAT 24 0.3% 9 37.5% 4 10.9 20.2
SUBFILE 5 0.1% 1 20.0% 45 73.8 86.6
PUBLICATION TYPE 28 0.4% 13 46.4% 13 30.1 45.2
LANGUAGE 1 0.0% 0 0.0% 1,035 1035.0 0.0
DATE 145 2.1% 23 15.9% 7 85.3 213.2
ADDED 15 0.2% 2 13.3% 5 45.3 143.9
PERIODICAL 515 7.4% 68 13.2% 4 71.3 643.5
EXACT PE 145 2.1% 21 14.5% 4 28.0 138.1
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 376 5.4% 142 37.8% 15 726.1 4818.3
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 618 9.8% 212 34.3% 5 40.3 137.9
Single 5,669 90.2% 1,142 20.1% 26 603.9 4074.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.3%
SHORT 75.3%
LONG 3.5%
FIELDS 0.9%
PERIODICALS 13.4%
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) 52:24
Average number of searches completed per session 1.0
Retrievals per search - median 48.0
Retrievals per search - average 449.6
Retrievals per search - standard deviation 1839.0
Percent of searches completed with 0 results 23.9%
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 117 20.6%
DISPLAY (excluding automatic displays) 208 36.7%
HELP 38 6.7%
EXPLAIN 12 2.1%
SET/RESET 77 13.6%
SHOW 3 0.5%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 91 16.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 21 3.7%
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 82 70.1% 21 25.6% 130 340.9 977.1
EXACT JOURNAL 27 23.1% 7 25.9% 62 275.6 524.4
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 8 6.8% 0 0.0% 4 3288.0 6075.2
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 117 100% 28 23.9% 98 591.1 2091.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 6.1%
ISSUES 52.6%
SHORT 18.0%
LONG 16.7%
PERIODICALS 4.8%
COMMENTS 0.0%
Other 1.8%
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 31.9%
2. First word of command is invalid 30.4%
3. FIND command with invalid index name 10.0%
4. Index invalid in current database 4.3%
5. Max. # of ports to a Z39 db are in use 2.7%
6. D ABS command in database w/o abstracts 2.4%
7. Valid command at an inappropriate time 1.8%
8. Search term missing from search command 1.7%
9. PS command - no previous screen 1.6%
10. DISPLAY command - no FIND results 1.4%
11. All others 11.7%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 18.0%
2. FIND (CC DB) 14.3%
3. LOCATE (ARTICLE DBS) 9.9%
4. COMMANDS 8.7%
5. CC INDEXES 6.8%
6. Unrecognized term 3.7%
7. MAIL 3.1%
8. DATABASES 3.1%
9. ADD-ON SEARCH 3.1%
10. CC DATABASE 3.1%
11. All others 26.1%
Ten most frequent HELP situations:
1. Help requested from START CC command 16.4%
2. First word of command is invalid 16.1%
3. FIND command with invalid index name 6.7%
4. DISPLAY command - middle of >1 screen 6.2%
5. F/BR with index invalid in current DB 5.9%
6. Help requested from SET DB command 5.0%
7. FIND command retrieves >1 book 4.4%
8. FIND command with zero results 3.8%
9. DISPLAY command-first of >1 screen 3.8%
10. Help requested from FIND PA command 3.8%
11. All others 27.9%
Ten most frequent SHOW requests:
1. HISTORY 45.9%
2. TIME 16.2%
3. CC SETTINGS 8.1%
4. SYSTEM NEWS 5.4%
5. SEARCH 5.4%
6. MAIL SETTINGS 2.7%
7. CC NEWS 2.7%
8. SC LIST (CC DBS) 2.7%
9. DLA BULLETIN 2.7%
10. MAIL STATUS 2.7%
11. All others 5.4%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)