MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 05/26/01 through 06/01/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 23 403 426
Davis 453 27 480
Irvine 241 0 241
Los Angeles 0 227 227
Riverside 33 52 85
San Diego 42 215 257
San Francisco 111 0 111
Santa Barbara 6 107 113
Santa Cruz 17 67 84
LBL 0 75 75
LLL 0 78 78
Los Alamos n/a 0 0
Other - UC 2 26 28
U.S. Forestry 0
Other-Network UC n/a 512 512
_______ ______ _____
928 1,789 2,717
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 45 98 1,638
2-4 a.m. 47 272 1,302
4-6 a.m. 36 97 794
6-8 a.m. 72 698 14,584
8-10 a.m. 280 1,210 17,677
10-12 a.m. 469 1,290 12,499
12-2 p.m. 505 1,535 49,954
2-4 p.m. 523 1,602 16,003
4-6 p.m. 357 927 9,833
6-8 p.m. 172 485 3,818
8-10 p.m. 111 407 3,418
10-12 p.m. 100 381 2,598
__________ __________ __________ _________________
Total: 2,717 9,002 134,118
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 79 1,205 1,284
Davis 1,211 93 1,304
Irvine 1,033 0 1,033
Los Angeles 0 633 633
Riverside 61 186 247
San Diego 115 606 721
San Francisco 280 0 280
Santa Barbara 10 271 281
Santa Cruz 50 189 239
LBL 0 258 258
LLL 0 1,470 1,470
Los Alamos n/a 0 0
Other - UC 4 53 57
U.S. Forestry 0
Other-Network UC n/a 1,195 1,195
_______ ______ _____
2,843 6,159 9,002
Number of FIND commands by database
CC database 8,865
CCT database 137
Total number of FIND commands 9,002
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 478 13,524 14,002
Davis 45,736 286 46,022
Irvine 5,460 0 5,460
Los Angeles 0 7,074 7,074
Riverside 424 3,360 3,784
San Diego 859 5,430 6,289
San Francisco 2,762 0 2,762
Santa Barbara 2,336 3,052 5,388
Santa Cruz 328 1,322 1,650
LBL 0 2,911 2,911
LLL 0 29,650 29,650
Los Alamos n/a 0 0
Other - UC 9 411 420
U.S. Forestry 0
Other-Network UC n/a 8,706 8,706
_______ ______ _____
58,392 75,726 134,118
Number of Records Displayed by database:
CC database 127,010
CCT database 7,108
Total number of Records Displayed 134,118
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.4%
Percent of CCT sessions 3.6%
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 1.2
Standard deviation in seconds 5.2
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 5.2
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 411:23
Average number of searches completed per session 3.4
Retrievals per search - median 8.0
Retrievals per search - average 449.8
Retrievals per search - standard deviation 5776.0
Percent of searches completed with 0 results 27.4%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 53.6%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,199 40.4%
DISPLAY (excluding automatic displays) 5,835 28.7%
HELP 121 0.6%
EXPLAIN 159 0.8%
SET/RESET 1,072 5.3%
SHOW 23 0.1%
ADD ON (AND, OR, AND NOT) 666 3.3%
LOGON or LOGOFF 3,244 16.0%
COMMENT 0 0.0%
SAVE 181 0.9%
USE 12 0.1%
OTHER 793 3.9%
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 3,868 38.2% 746 19.3% 27 261.1 1665.8
TITLE WORD 2,380 23.5% 713 30.0% 15 1016.3 11256.0
EXACT TITLE 108 1.1% 51 47.2% 2 132.1 885.3
JOURNAL 511 5.0% 233 45.6% 36 1604.7 6279.7
EXACT JOURNAL 888 8.8% 420 47.3% 40 1063.9 5433.6
SUBJECT CAT 117 1.2% 14 12.0% 5 30.6 180.1
SUBFILE 19 0.2% 1 5.3% 37 1073.2 2159.7
PUBLICATION TYPE 18 0.2% 5 27.8% 6 49.2 96.3
LANGUAGE 3 0.0% 1 33.3% 73 73.0 24.0
DATE 135 1.3% 20 14.8% 10 184.7 1069.4
ADDED 1,357 13.4% 718 52.9% 24 48.2 60.5
PERIODICAL 268 2.6% 42 15.7% 4 340.5 3853.8
EXACT PE 28 0.3% 2 7.1% 4 15.7 29.6
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 434 4.3% 139 32.0% 27 1392.0 12358.7
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 1,937 23.7% 883 45.6% 16 74.4 475.5
Single 6,236 76.3% 1,333 21.4% 29 788.7 7734.2
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.2%
SHORT 80.3%
LONG 3.6%
FIELDS 3.3%
PERIODICALS 6.2%
COMMENTS 0.0%
Other 1.5%
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) 39:50
Average number of searches completed per session 1.4
Retrievals per search - median 67.0
Retrievals per search - average 473.7
Retrievals per search - standard deviation 1525.5
Percent of searches completed with 0 results 19.0%
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 137 22.1%
DISPLAY (excluding automatic displays) 264 42.5%
HELP 23 3.7%
EXPLAIN 15 2.4%
SET/RESET 63 10.1%
SHOW 3 0.5%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 93 15.0%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 1 0.2%
OTHER 22 3.5%
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 69 49.6% 16 23.2% 108 250.8 763.8
EXACT JOURNAL 56 40.3% 10 17.9% 143 246.4 380.1
SUBJECT CAT 6 4.3% 0 0.0% 6,239 6707.2 2621.1
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 2 1.4% 0 0.0% 5 5.0 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 4.3% 0 0.0% 4 4.5 4.8
By number of indexes:
Multiple 2 1.5% 0 0.0% 5 5.0 0.0
Single 135 98.5% 26 19.3% 130 595.3 1690.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 12.2%
ISSUES 47.2%
SHORT 11.8%
LONG 25.3%
PERIODICALS 3.5%
COMMENTS 0.0%
Other 0.0%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 7.9%
Ten most frequent errors:
1. NS command - no next screen 36.3%
2. First word of command is invalid 28.0%
3. FIND command with invalid index name 8.5%
4. Index invalid in current database 4.1%
5. Max. # of ports to a Z39 db are in use 3.6%
6. Search term missing from search command 2.2%
7. DISPLAY command contains invalid word 1.7%
8. D ABS command in database w/o abstracts 1.7%
9. DISPLAY command - no FIND results 1.5%
10. Add-on search, no index name after verb 1.3%
11. All others 11.0%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 16.1%
2. FIND (CC DB) 9.2%
3. CC INDEXES 7.5%
4. COMMANDS 6.3%
5. Unrecognized term 5.7%
6. CC DATABASE 5.7%
7. SUBJECT CATEGORY 5.2%
8. LOCATE (ARTICLE DBS) 4.0%
9. DISPLAY 4.0%
10. ADD-ON SEARCH 2.9%
11. All others 33.3%
Ten most frequent HELP situations:
1. Help requested from START CC command 16.0%
2. First word of command is invalid 11.6%
3. DISPLAY command - middle of >1 screen 9.1%
4. F/BR with index invalid in current DB 8.2%
5. FIND command with invalid index name 6.3%
6. Help requested from SET DB command 6.3%
7. DISPLAY command-first of >1 screen 5.7%
8. DISPLAY command-complete in one screen 4.4%
9. NS command - no next screen 3.5%
10. FIND command retrieves >1 book 3.1%
11. All others 25.8%
Ten most frequent SHOW requests:
1. HISTORY 50.0%
2. SC LIST (CC DBS) 18.2%
3. SEARCH 13.6%
4. SYSTEM NEWS 4.5%
5. CC GLOSSARY 4.5%
6. CC STATISTICS 4.5%
7. MAIL STATUS 4.5%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)