MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 06/01/02 through 06/07/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 14 348 362
Davis 222 9 231
Irvine 94 0 94
Los Angeles 0 134 134
Riverside 10 40 50
San Diego 28 113 141
San Francisco 108 0 108
Santa Barbara 1 65 66
Santa Cruz 1 21 22
LBL 0 100 100
LLL 0 32 32
Los Alamos n/a 0 0
Other - UC 0 40 40
U.S. Forestry 0
Other-Network UC n/a 241 241
_______ ______ _____
478 1,143 1,621
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 28 115 868
2-4 a.m. 11 96 574
4-6 a.m. 14 49 472
6-8 a.m. 37 97 679
8-10 a.m. 183 564 3,816
10-12 a.m. 322 949 9,292
12-2 p.m. 295 888 7,513
2-4 p.m. 355 892 9,659
4-6 p.m. 198 555 6,643
6-8 p.m. 100 298 2,891
8-10 p.m. 47 187 1,503
10-12 p.m. 31 112 1,716
__________ __________ __________ _________________
Total: 1,621 4,802 45,626
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 50 951 1,001
Davis 747 31 778
Irvine 308 0 308
Los Angeles 0 369 369
Riverside 15 111 126
San Diego 97 299 396
San Francisco 475 0 475
Santa Barbara 1 224 225
Santa Cruz 4 54 58
LBL 0 248 248
LLL 0 89 89
Los Alamos n/a 0 0
Other - UC 3 134 137
U.S. Forestry 0
Other-Network UC n/a 592 592
_______ ______ _____
1,700 3,102 4,802
Number of FIND commands by database
CC database 4,728
CCT database 74
Total number of FIND commands 4,802
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 535 9,694 10,229
Davis 7,115 176 7,291
Irvine 2,576 0 2,576
Los Angeles 0 4,625 4,625
Riverside 317 900 1,217
San Diego 576 3,178 3,754
San Francisco 3,726 0 3,726
Santa Barbara 32 2,007 2,039
Santa Cruz 9 359 368
LBL 0 2,770 2,770
LLL 0 1,184 1,184
Los Alamos n/a 0 0
Other - UC 4 1,533 1,537
U.S. Forestry 0
Other-Network UC n/a 4,310 4,310
_______ ______ _____
14,890 30,736 45,626
Number of Records Displayed by database:
CC database 41,599
CCT database 4,027
Total number of Records Displayed 45,626
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.2%
Percent of CCT sessions 3.8%
Percent of searches done in the CC database 98.5%
Percent of searches done in the CCT database 1.5%
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
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 544:24
Average number of searches completed per session 3.0
Retrievals per search - median 10.0
Retrievals per search - average 418.6
Retrievals per search - standard deviation 2746.6
Percent of searches completed with 0 results 20.0%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 75.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,381 37.0%
DISPLAY (excluding automatic displays) 3,548 29.9%
HELP 90 0.8%
EXPLAIN 94 0.8%
SET/RESET 586 4.9%
SHOW 22 0.2%
ADD ON (AND, OR, AND NOT) 347 2.9%
LOGON or LOGOFF 2,053 17.3%
COMMENT 0 0.0%
SAVE 222 1.9%
USE 0 0.0%
OTHER 509 4.3%
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 1,998 41.3% 282 14.1% 30 181.8 1325.6
TITLE WORD 1,556 32.2% 452 29.0% 13 561.7 3527.1
EXACT TITLE 58 1.2% 19 32.8% 4 20.6 42.8
JOURNAL 270 5.6% 76 28.1% 973 2909.8 5736.5
EXACT JOURNAL 116 2.4% 26 22.4% 1,416 3148.0 6324.5
SUBJECT CAT 21 0.4% 2 9.5% 12 26.4 37.5
SUBFILE 14 0.3% 0 0.0% 10 18.6 20.9
PUBLICATION TYPE 14 0.3% 2 14.3% 17 27.5 36.1
LANGUAGE 19 0.4% 2 10.5% 3 5.5 8.6
DATE 115 2.4% 20 17.4% 5 162.8 521.9
ADDED 51 1.1% 14 27.4% 4 8.9 10.9
PERIODICAL 326 6.7% 39 12.0% 4 27.8 102.5
EXACT PE 83 1.7% 5 6.0% 3 10.6 33.5
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 192 4.0% 57 29.7% 22 1037.6 6744.4
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 435 10.0% 108 24.8% 5 115.8 509.8
Single 3,928 90.0% 776 19.8% 28 593.5 3312.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.1%
SHORT 75.1%
LONG 4.4%
FIELDS 1.9%
PERIODICALS 13.8%
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) 75:33
Average number of searches completed per session 1.2
Retrievals per search - median 54.0
Retrievals per search - average 226.0
Retrievals per search - standard deviation 935.4
Percent of searches completed with 0 results 32.4%
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 74 22.8%
DISPLAY (excluding automatic displays) 110 33.9%
HELP 16 4.9%
EXPLAIN 10 3.1%
SET/RESET 44 13.6%
SHOW 2 0.6%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 56 17.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 12 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 57 73.1% 19 33.3% 170 389.8 1286.0
EXACT JOURNAL 10 12.8% 5 50.0% 202 254.4 223.1
SUBJECT CAT 3 3.8% 0 0.0% 181 204.7 133.1
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 3 3.8% 0 0.0% 181 204.7 133.1
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 5 6.4% 0 0.0% 6 5.4 1.5
By number of indexes:
Multiple 4 5.4% 0 0.0% 133 155.0 147.2
Single 70 94.6% 24 34.3% 160 350.0 1172.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 4.9%
ISSUES 51.2%
SHORT 23.6%
LONG 17.1%
PERIODICALS 3.3%
COMMENTS 0.0%
Other 0.0%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
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Percent of commands that contained errors 8.7%
Ten most frequent errors:
1. First word of command is invalid 30.8%
2. NS command - no next screen 29.3%
3. FIND command with invalid index name 9.7%
4. PS command - no previous screen 4.3%
5. DISPLAY command contains invalid word 3.0%
6. DISPLAY command - no FIND results 2.4%
7. Index invalid in current database 2.3%
8. Search term missing from search command 2.0%
9. Valid command at an inappropriate time 1.8%
10. 167 1.4%
11. All others 13.0%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 17.3%
2. FIND (CC DB) 12.5%
3. LOCATE (ARTICLE DBS) 8.7%
4. Unrecognized term 6.7%
5. DISPLAY 6.7%
6. CC DATABASE 5.8%
7. CC INDEXES 4.8%
8. MAIL 3.8%
9. COMMANDS 2.9%
10. ADD-ON SEARCH 2.9%
11. All others 27.9%
Ten most frequent HELP situations:
1. Help requested from START CC command 17.6%
2. First word of command is invalid 15.7%
3. FIND command with invalid index name 8.1%
4. DISPLAY command-first of >1 screen 6.2%
5. Help requested from SET DB command 5.7%
6. F/BR with index invalid in current DB 5.2%
7. FIND command with zero results 4.3%
8. PS command - no previous screen 3.3%
9. 352 3.3%
10. DISPLAY command-complete in one screen 2.9%
11. All others 27.6%
Ten most frequent SHOW requests:
1. HISTORY 69.6%
2. CC NEWS 13.0%
3. SYSTEM NEWS 8.7%
4. IAC STATISTICS 4.3%
5. SEARCH 4.3%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)